Async performance problems.

Discussion in 'Cisco' started by Erik Tamminga, Apr 13, 2004.

  1. Hi,

    We've setup a C2621 (not the XM, the older) with a NM-8AM module to allow
    for analog dial-in for our mechanics. Setup went smooth but communications
    didn't. The dial-in succeeds but the connection is terribly slow. Any tips
    on what I can do to pinpoint the problem?

    Could this have anything to do with mismatched (AT-commands\registers) and
    line setup? I noticed a "Serial flow OFF AT\Q0" and a "line- flowcontrol
    hardware" do these match? All modem settings are factory-defaults.

    Please advise,

    Erik

    Here is our related config / show ... output:

    -- Relevant async configuration sections

    interface Loopback0
    ip address 10.240.222.113 255.255.255.240
    no ip directed-broadcast
    !
    ip local pool DIALIN 10.240.222.114 10.240.222.124
    !
    interface Group-Async1
    ip unnumbered Loopback0
    no ip directed-broadcast
    encapsulation ppp
    ip tcp header-compression passive
    dialer in-band
    dialer idle-timeout 600
    dialer-group 1
    async mode dedicated
    peer default ip address pool DIALIN
    no cdp enable
    ppp callback accept
    ppp authentication ms-chap chap
    group-range 33 36
    !

    line 33 36
    autoselect ppp
    modem InOut
    modem autoconfigure type mica
    rotary 1
    transport input all
    escape-character NONE
    flowcontrol hardware
    !

    -- Show version

    Cisco Internetwork Operating System Software
    IOS (tm) C2600 Software (C2600-D-M), Version 12.0(7)T, RELEASE SOFTWARE
    (fc2)
    Copyright (c) 1986-1999 by cisco Systems, Inc.
    Compiled Tue 07-Dec-99 01:20 by phanguye
    Image text-base: 0x80008088, data-base: 0x808D24CC

    ROM: System Bootstrap, Version 11.3(2)XA4, RELEASE SOFTWARE (fc1)

    StarrenVegDRTR2 uptime is 3 days, 23 hours, 57 minutes
    System returned to ROM by reload at 18:05:47 UTC Tue Feb 27 2001
    System image file is "flash:c2600-d-mz.120-7.T.bin"

    cisco 2621 (MPC860) processor (revision 0x102) with 26624K/6144K bytes of
    memory
    ..
    Processor board ID JAD045005XI (3965570801)
    M860 processor: part number 0, mask 49
    Bridging software.
    X.25 software, Version 3.0.0.
    Basic Rate ISDN software, Version 1.1.
    2 FastEthernet/IEEE 802.3 interface(s)
    1 Serial network interface(s)
    1 ISDN Basic Rate interface(s)
    8 terminal line(s) ! (This is the NM-8AM module)
    32K bytes of non-volatile configuration memory.
    8192K bytes of processor board System flash (Read/Write)

    Configuration register is 0x2102

    -- Show modem

    Avg Hold Inc calls Out calls Busied Failed No
    Succ
    Mdm Time Succ Fail Succ Fail Out Dial Answer
    Pct.
    1/0 00:04:03 7 0 0 0 0 0 0
    100%
    1/1 00:08:37 7 1 0 0 0 0 0
    88%
    1/2 00:07:25 7 0 0 0 0 0 0
    100%
    1/3 00:06:04 8 0 0 0 0 0 0
    100%
    ....
    -- Show modem configuration 1/0 (all others show the same output)

    IDLE 000:01:48
    LAST DIAL
    MODEM HW: PC 2W United States
    - RTS 5 CTS 6 DSR - CD 20 DTR - RI
    MODULATION IDLE
    MODEM BPS 33600 AT%G0
    MODEM FLOW OFF AT\G0
    MODEM MODE AUT AT\N3
    BASE MODE V34 AT%M2
    V.23 OPR. OFF AT%F0
    AUTO ANS. ON ATS0=1
    SERIAL BPS 38400 AT
    BPS ADJUST OFF AT\J0
    SPT BPS ADJ. 0 AT\W0
    ANSWER MESSGS OFF ATQ2
    SERIAL FLOW OFF AT\Q0
    PASS XON/XOFF OFF AT\X0
    PARITY 8N AT
    BREAK 5 AT\K5
    EXIT CHAR 043 ATS2=43
    ANS DUMB MODE OFF AT#E0
    CMD ECHO ON ATE1
    RESULTS ON ATQ0
    RESULT TYPE MNPX ATV1\V2
    CONNECT MSG MDM ATW2
    CONN MNP- 0 AT-M0
    SPEED MATCH 1 AT%L1
    EQUALIZER 1 AT:E1
    FALLBACK 2 AT-Q2
    DATA ECHO OFF AT\E0
    INACT TIMER 00 AT\T0
    AUTO RETRAIN ON AT%E1
    COMPRESSION ALL AT%C3
    MAX BLK SIZE 256 AT\A3
    AUTO BUFF 0 AT\C0
    AUTO CHAR 000 AT%A0
    PAUSE TIME 002 ATS8=2
    DTR 2 AT&D2
    CARR DET 1 AT&C1
    DSR 0 AT\D0
    RING IND 1 AT\R1
    LEASE LINE 0 AT&L0
    LNG SPC DISC OFF ATY0
    BUSIED OUT IDLE AT*Y0
    DISC DELAY 000 AT%D0
    RDLB ENABLE OFF AT&T5
    DIAL MODE 4 ATX4
    PULSE DIAL 60% AT&P0
    PULSE MODE N AT%W0
    V23 HD EQU ON AT%O1
    GUARD TONE 0 AT&G0
    DATA CALL TONE OFF AT-C0
    2ND FC OFF AT-F0
    NM BIT VALUE 0 AT-E0
    PAR CHK 0 AT-P0
    MANUAL DIAL 0 AT:D0
    UPSHIFT BPS OFF AT*H0
    CELLULAR OFF AT)M0
    LINETYPE 000 AT@M0
    DETECT PHASE ON AT-J1
    MNP EXT SVC 2 AT-K2
    UNIV V.23 1 AT-V1
    CONNECT MSG 1ST AT@C0
    DUMB MODE OFF AT-H0
    BELL ON ATB1
    CALL ABT DISAB OFF AT-Y0
    REVERSE ANS OFF AT-W0
    MIN CONN SPD 300 AT@U
    MU-LAW/A_LAW MU-L AT"A0
    REM CHAR 042 AT*S42

    -- SHow modem version

    Slot 1:MCOM Analog Integrated Modem Firmware Version 1.2.0
    Source: IOS
    Boot firmware: 1.1.5
    MIMIC firmware: 1.3.3
    Modem firmware: 2.3.8
    DSP firmware: 0.0.2

    -- Show modem operational-status

    MNP Class 10 V.34 Modem
    MODEM HW: PC 2W United States
    Firmware Rev 2.3.9/85
    DSP C36 Part/Rev 3635 4241
    DSP C58 Part/Rev 3635 2041
    DSP Controller Rev 0.0
    DSP Data Pump Rev 0.0
    Connect Time 000:01:48
    - RTS 5 CTS 6 DSR - CD 20 DTR - RI
    Disconnect Remote - Local - 14,9

    Mod Type IDLE
    TX/RX Spd ***** ***** BPS
    TX/RX Spd Mask NA BFFF Hex
    Symbol Rate 2400 Hz
    TX/RX Carrier Freq 1600 1600 Hz
    TX/RX States 16 16
    TX/RX NLE OFF OFF
    TX/RX Precoding OFF OFF
    TX/RX Shaping OFF OFF
    TX Preemphasis Index 0
    TX Lvl REG - 13 dBm
    TX Lvl RAM - 0 dB
    TX Lvl Reduct 0 dB
    TX Lvl - 13 dBm
    RX Lvl - 33 dBm
    S/NR 0
    S/DR 0
    EQM 0000 Hex
    AVG EQM 0000 Hex
    Lower/Upper Edge 0 0 Hz
    Phase Jitter Freq 0 Hz
    Phase Jitter Amp 0.0 deg
    Far Echo Lvl 0 N
    Round Trip Delay 0 msec
    Dropouts > 5dB 0
    RTRNs Init/Accept 0 0
    RRENs Init/Accept 0 0
    BLER 0000 Hex
    RBS Counter 0000 Hex
    Digital Pad Detected NA
    Max SECRXB 85
    Max SECTXB 87

    -- show modem connect-speeds 36600

    connect speeds

    Mdm 26400 28000 28800 29333 30667 31200 32000 33333 33600 TotCnt
    1/0 0 0 0 0 0 1 0 0 6 7
    1/1 2 0 0 0 0 1 0 0 4 7
    1/2 1 0 0 0 0 1 0 0 5 7
    1/3 1 0 0 0 0 1 0 0 6 8

    -- show modem log

    Modem 1/0 Events Log:
    2d23h DTR set low
    2d23h Modem disabled
    2d23h PPP escape maps set: TX map=00000000 RX map=FFFFFFFF
    2d23h DTR set high
    2d23h Modem enabled
    2d23h Modem disabled
    2d19h Modem State: Dialing/Answering
    2d19h CSM: event-MODEM_STARTING_CONNECT New
    State-CSM_CONNECT_INITIATED_STATE
    2d19h Modem State: Incoming ring
    2d19h CSM: event-MODEM_ANALOG_CALL_IN New State-CSM_CONNECT_INITIATED_STATE
    2d19h Hook state: Off hook
    2d19h Modem State: Waiting for Carrier
    2d19h Modem State: Connected
    2d19h Connection: TX/RX Speed = 31200/24000, Modulation = V34
    Direction = Answer, Protocol = LAPM, Compression = V42bis
    2d19h CSM: event-MODEM_CONNECTED New State-CONNECTED_STATE
    2d19h PPP mode active
    2d19h Modem enabled
    2d19h PPP escape maps set: TX map=00000000 RX map=FFFFFFFF
    2d19h PPP escape maps set: TX map=00000000 RX map=00000000
    2d19h Modem Analog Report: TX = -13, RX = -37, Signal to noise = 33
    2d19h Modem State: Retrain Accepted
    2d19h Connection update: TX/RX Speed = 28800/26400, Modulation = V34
    2d19h Modem State: Connected
    2d19h Modem State: Disconnecting
    2d19h CSM: event-MODEM_DISCONNECTED New State-IDLE_STATE
    2d19h End connection: Retransmits for MNP block (TX/RX) = 0/0
    Duration = 0:00:32, Number of TX/RX char = 5039/2887
    Local Disc Reason = Remote Link Disc
    Remote Disc Reason = Unknown
    2d19h Hook state: On hook
    2d19h Modem State: Idle
    2d19h DTR set low
    2d19h DTR set low
    2d19h Modem disabled
    2d19h Character mode active
    2d19h DTR set high
    2d19h Modem enabled
    2d19h Modem disabled
    2d04h Modem State: Dialing/Answering
    2d04h CSM: event-MODEM_STARTING_CONNECT New
    State-CSM_CONNECT_INITIATED_STATE
    2d04h Modem State: Incoming ring
    2d04h CSM: event-MODEM_ANALOG_CALL_IN New State-CSM_CONNECT_INITIATED_STATE
    Erik Tamminga, Apr 13, 2004
    #1
    1. Advertising

  2. Everything you show below looks fine. Can you quantify
    what "terribly slow" means to you?

    The one call you show shows that the call trained at
    31.2kbps transmit / 24kbps receive which is in the range
    of normalcy for V.34. It does show one retrain during
    the (short) call. If you stay connected longer (like, for
    minutes or hours), do you continue to retrain repetitively?
    What does the modem log show for a call that stays connected
    for a long time and moves much data?

    Aaron

    ---

    ~ Hi,
    ~
    ~ We've setup a C2621 (not the XM, the older) with a NM-8AM module to allow
    ~ for analog dial-in for our mechanics. Setup went smooth but communications
    ~ didn't. The dial-in succeeds but the connection is terribly slow. Any tips
    ~ on what I can do to pinpoint the problem?
    ~
    ~ Could this have anything to do with mismatched (AT-commands\registers) and
    ~ line setup? I noticed a "Serial flow OFF AT\Q0" and a "line- flowcontrol
    ~ hardware" do these match? All modem settings are factory-defaults.
    ~
    ~ Please advise,
    ~
    ~ Erik
    ~
    ~ Here is our related config / show ... output:
    ~
    ~ -- Relevant async configuration sections
    ~
    ~ interface Loopback0
    ~ ip address 10.240.222.113 255.255.255.240
    ~ no ip directed-broadcast
    ~ !
    ~ ip local pool DIALIN 10.240.222.114 10.240.222.124
    ~ !
    ~ interface Group-Async1
    ~ ip unnumbered Loopback0
    ~ no ip directed-broadcast
    ~ encapsulation ppp
    ~ ip tcp header-compression passive
    ~ dialer in-band
    ~ dialer idle-timeout 600
    ~ dialer-group 1
    ~ async mode dedicated
    ~ peer default ip address pool DIALIN
    ~ no cdp enable
    ~ ppp callback accept
    ~ ppp authentication ms-chap chap
    ~ group-range 33 36
    ~ !
    ~
    ~ line 33 36
    ~ autoselect ppp
    ~ modem InOut
    ~ modem autoconfigure type mica
    ~ rotary 1
    ~ transport input all
    ~ escape-character NONE
    ~ flowcontrol hardware
    ~ !
    ~
    ~ -- Show version
    ~
    ~ Cisco Internetwork Operating System Software
    ~ IOS (tm) C2600 Software (C2600-D-M), Version 12.0(7)T, RELEASE SOFTWARE
    ~ (fc2)
    ~ Copyright (c) 1986-1999 by cisco Systems, Inc.
    ~ Compiled Tue 07-Dec-99 01:20 by phanguye
    ~ Image text-base: 0x80008088, data-base: 0x808D24CC
    ~
    ~ ROM: System Bootstrap, Version 11.3(2)XA4, RELEASE SOFTWARE (fc1)
    ~
    ~ StarrenVegDRTR2 uptime is 3 days, 23 hours, 57 minutes
    ~ System returned to ROM by reload at 18:05:47 UTC Tue Feb 27 2001
    ~ System image file is "flash:c2600-d-mz.120-7.T.bin"
    ~
    ~ cisco 2621 (MPC860) processor (revision 0x102) with 26624K/6144K bytes of
    ~ memory
    ~ .
    ~ Processor board ID JAD045005XI (3965570801)
    ~ M860 processor: part number 0, mask 49
    ~ Bridging software.
    ~ X.25 software, Version 3.0.0.
    ~ Basic Rate ISDN software, Version 1.1.
    ~ 2 FastEthernet/IEEE 802.3 interface(s)
    ~ 1 Serial network interface(s)
    ~ 1 ISDN Basic Rate interface(s)
    ~ 8 terminal line(s) ! (This is the NM-8AM module)
    ~ 32K bytes of non-volatile configuration memory.
    ~ 8192K bytes of processor board System flash (Read/Write)
    ~
    ~ Configuration register is 0x2102
    ~
    ~ -- Show modem
    ~
    ~ Avg Hold Inc calls Out calls Busied Failed No
    ~ Succ
    ~ Mdm Time Succ Fail Succ Fail Out Dial Answer
    ~ Pct.
    ~ 1/0 00:04:03 7 0 0 0 0 0 0
    ~ 100%
    ~ 1/1 00:08:37 7 1 0 0 0 0 0
    ~ 88%
    ~ 1/2 00:07:25 7 0 0 0 0 0 0
    ~ 100%
    ~ 1/3 00:06:04 8 0 0 0 0 0 0
    ~ 100%
    ~ ...
    ~ -- Show modem configuration 1/0 (all others show the same output)
    ~
    ~ IDLE 000:01:48
    ~ LAST DIAL
    ~ MODEM HW: PC 2W United States
    ~ - RTS 5 CTS 6 DSR - CD 20 DTR - RI
    ~ MODULATION IDLE
    ~ MODEM BPS 33600 AT%G0
    ~ MODEM FLOW OFF AT\G0
    ~ MODEM MODE AUT AT\N3
    ~ BASE MODE V34 AT%M2
    ~ V.23 OPR. OFF AT%F0
    ~ AUTO ANS. ON ATS0=1
    ~ SERIAL BPS 38400 AT
    ~ BPS ADJUST OFF AT\J0
    ~ SPT BPS ADJ. 0 AT\W0
    ~ ANSWER MESSGS OFF ATQ2
    ~ SERIAL FLOW OFF AT\Q0
    ~ PASS XON/XOFF OFF AT\X0
    ~ PARITY 8N AT
    ~ BREAK 5 AT\K5
    ~ EXIT CHAR 043 ATS2=43
    ~ ANS DUMB MODE OFF AT#E0
    ~ CMD ECHO ON ATE1
    ~ RESULTS ON ATQ0
    ~ RESULT TYPE MNPX ATV1\V2
    ~ CONNECT MSG MDM ATW2
    ~ CONN MNP- 0 AT-M0
    ~ SPEED MATCH 1 AT%L1
    ~ EQUALIZER 1 AT:E1
    ~ FALLBACK 2 AT-Q2
    ~ DATA ECHO OFF AT\E0
    ~ INACT TIMER 00 AT\T0
    ~ AUTO RETRAIN ON AT%E1
    ~ COMPRESSION ALL AT%C3
    ~ MAX BLK SIZE 256 AT\A3
    ~ AUTO BUFF 0 AT\C0
    ~ AUTO CHAR 000 AT%A0
    ~ PAUSE TIME 002 ATS8=2
    ~ DTR 2 AT&D2
    ~ CARR DET 1 AT&C1
    ~ DSR 0 AT\D0
    ~ RING IND 1 AT\R1
    ~ LEASE LINE 0 AT&L0
    ~ LNG SPC DISC OFF ATY0
    ~ BUSIED OUT IDLE AT*Y0
    ~ DISC DELAY 000 AT%D0
    ~ RDLB ENABLE OFF AT&T5
    ~ DIAL MODE 4 ATX4
    ~ PULSE DIAL 60% AT&P0
    ~ PULSE MODE N AT%W0
    ~ V23 HD EQU ON AT%O1
    ~ GUARD TONE 0 AT&G0
    ~ DATA CALL TONE OFF AT-C0
    ~ 2ND FC OFF AT-F0
    ~ NM BIT VALUE 0 AT-E0
    ~ PAR CHK 0 AT-P0
    ~ MANUAL DIAL 0 AT:D0
    ~ UPSHIFT BPS OFF AT*H0
    ~ CELLULAR OFF AT)M0
    ~ LINETYPE 000 AT@M0
    ~ DETECT PHASE ON AT-J1
    ~ MNP EXT SVC 2 AT-K2
    ~ UNIV V.23 1 AT-V1
    ~ CONNECT MSG 1ST AT@C0
    ~ DUMB MODE OFF AT-H0
    ~ BELL ON ATB1
    ~ CALL ABT DISAB OFF AT-Y0
    ~ REVERSE ANS OFF AT-W0
    ~ MIN CONN SPD 300 AT@U
    ~ MU-LAW/A_LAW MU-L AT"A0
    ~ REM CHAR 042 AT*S42
    ~
    ~ -- SHow modem version
    ~
    ~ Slot 1:MCOM Analog Integrated Modem Firmware Version 1.2.0
    ~ Source: IOS
    ~ Boot firmware: 1.1.5
    ~ MIMIC firmware: 1.3.3
    ~ Modem firmware: 2.3.8
    ~ DSP firmware: 0.0.2
    ~
    ~ -- Show modem operational-status
    ~
    ~ MNP Class 10 V.34 Modem
    ~ MODEM HW: PC 2W United States
    ~ Firmware Rev 2.3.9/85
    ~ DSP C36 Part/Rev 3635 4241
    ~ DSP C58 Part/Rev 3635 2041
    ~ DSP Controller Rev 0.0
    ~ DSP Data Pump Rev 0.0
    ~ Connect Time 000:01:48
    ~ - RTS 5 CTS 6 DSR - CD 20 DTR - RI
    ~ Disconnect Remote - Local - 14,9
    ~
    ~ Mod Type IDLE
    ~ TX/RX Spd ***** ***** BPS
    ~ TX/RX Spd Mask NA BFFF Hex
    ~ Symbol Rate 2400 Hz
    ~ TX/RX Carrier Freq 1600 1600 Hz
    ~ TX/RX States 16 16
    ~ TX/RX NLE OFF OFF
    ~ TX/RX Precoding OFF OFF
    ~ TX/RX Shaping OFF OFF
    ~ TX Preemphasis Index 0
    ~ TX Lvl REG - 13 dBm
    ~ TX Lvl RAM - 0 dB
    ~ TX Lvl Reduct 0 dB
    ~ TX Lvl - 13 dBm
    ~ RX Lvl - 33 dBm
    ~ S/NR 0
    ~ S/DR 0
    ~ EQM 0000 Hex
    ~ AVG EQM 0000 Hex
    ~ Lower/Upper Edge 0 0 Hz
    ~ Phase Jitter Freq 0 Hz
    ~ Phase Jitter Amp 0.0 deg
    ~ Far Echo Lvl 0 N
    ~ Round Trip Delay 0 msec
    ~ Dropouts > 5dB 0
    ~ RTRNs Init/Accept 0 0
    ~ RRENs Init/Accept 0 0
    ~ BLER 0000 Hex
    ~ RBS Counter 0000 Hex
    ~ Digital Pad Detected NA
    ~ Max SECRXB 85
    ~ Max SECTXB 87
    ~
    ~ -- show modem connect-speeds 36600
    ~
    ~ connect speeds
    ~
    ~ Mdm 26400 28000 28800 29333 30667 31200 32000 33333 33600 TotCnt
    ~ 1/0 0 0 0 0 0 1 0 0 6 7
    ~ 1/1 2 0 0 0 0 1 0 0 4 7
    ~ 1/2 1 0 0 0 0 1 0 0 5 7
    ~ 1/3 1 0 0 0 0 1 0 0 6 8
    ~
    ~ -- show modem log
    ~
    ~ Modem 1/0 Events Log:
    ~ 2d23h DTR set low
    ~ 2d23h Modem disabled
    ~ 2d23h PPP escape maps set: TX map=00000000 RX map=FFFFFFFF
    ~ 2d23h DTR set high
    ~ 2d23h Modem enabled
    ~ 2d23h Modem disabled
    ~ 2d19h Modem State: Dialing/Answering
    ~ 2d19h CSM: event-MODEM_STARTING_CONNECT New
    ~ State-CSM_CONNECT_INITIATED_STATE
    ~ 2d19h Modem State: Incoming ring
    ~ 2d19h CSM: event-MODEM_ANALOG_CALL_IN New State-CSM_CONNECT_INITIATED_STATE
    ~ 2d19h Hook state: Off hook
    ~ 2d19h Modem State: Waiting for Carrier
    ~ 2d19h Modem State: Connected
    ~ 2d19h Connection: TX/RX Speed = 31200/24000, Modulation = V34
    ~ Direction = Answer, Protocol = LAPM, Compression = V42bis
    ~ 2d19h CSM: event-MODEM_CONNECTED New State-CONNECTED_STATE
    ~ 2d19h PPP mode active
    ~ 2d19h Modem enabled
    ~ 2d19h PPP escape maps set: TX map=00000000 RX map=FFFFFFFF
    ~ 2d19h PPP escape maps set: TX map=00000000 RX map=00000000
    ~ 2d19h Modem Analog Report: TX = -13, RX = -37, Signal to noise = 33
    ~ 2d19h Modem State: Retrain Accepted
    ~ 2d19h Connection update: TX/RX Speed = 28800/26400, Modulation = V34
    ~ 2d19h Modem State: Connected
    ~ 2d19h Modem State: Disconnecting
    ~ 2d19h CSM: event-MODEM_DISCONNECTED New State-IDLE_STATE
    ~ 2d19h End connection: Retransmits for MNP block (TX/RX) = 0/0
    ~ Duration = 0:00:32, Number of TX/RX char = 5039/2887
    ~ Local Disc Reason = Remote Link Disc
    ~ Remote Disc Reason = Unknown
    ~ 2d19h Hook state: On hook
    ~ 2d19h Modem State: Idle
    ~ 2d19h DTR set low
    ~ 2d19h DTR set low
    ~ 2d19h Modem disabled
    ~ 2d19h Character mode active
    ~ 2d19h DTR set high
    ~ 2d19h Modem enabled
    ~ 2d19h Modem disabled
    ~ 2d04h Modem State: Dialing/Answering
    ~ 2d04h CSM: event-MODEM_STARTING_CONNECT New
    ~ State-CSM_CONNECT_INITIATED_STATE
    ~ 2d04h Modem State: Incoming ring
    ~ 2d04h CSM: event-MODEM_ANALOG_CALL_IN New State-CSM_CONNECT_INITIATED_STATE
    ~
    ~
    ~
    ~
    ~
    Aaron Leonard, Apr 14, 2004
    #2
    1. Advertising

  3. Hi Aaron,

    "Terribly slow" means you can't even work in a telnet session to the router
    dialed in to and websites (local to the router, few pictures) take ages to
    load. I know modem connections don't go much faster than 2-4kBps, but this
    doesn't match experienced throughput. All modems that connect connect at
    their expected speeds (28800, 33600, etc). Send/receive leds on the client
    modems don't indicate full line usage.
    I checked to make sure this is not an external problem like slow or failing
    dns or bad/instable routing tables. Bad "telnet performance" to the router
    dailed-in to confirms this.

    For example:
    dial in to router A (connected at 33k6)
    telnet to router A (ip address loopback, or any other address of the router)
    login and do a "show start" takes ~10 seconds to fill the screen (so do
    additional pages).
    when typing commands (I can actually type them quite fast), I have to wait
    for the characters to get echod back for ages.

    I can easily reproduce this behaviour because it happens ~100% of all
    connects. Some people indicated a change of their local modem
    errordetection/compression settings (windows 2000 dialup properties)
    resulted in some better performance, but I haven't been able to confirm
    this.

    Currently I'm thinking this is some kind of router-line <->
    modem-serial-port configuration mismatch. The reason I think this is that
    the output of a show modem configuration 1/0 shows "SERIAL FLOW OFF AT\Q0"
    while router-line configuration has "flowcontrol hardware" configured. Could
    this impact performance?

    Please advise,

    Erik


    "Aaron Leonard" <> wrote in message
    news:...
    > Everything you show below looks fine. Can you quantify
    > what "terribly slow" means to you?
    >
    > The one call you show shows that the call trained at
    > 31.2kbps transmit / 24kbps receive which is in the range
    > of normalcy for V.34. It does show one retrain during
    > the (short) call. If you stay connected longer (like, for
    > minutes or hours), do you continue to retrain repetitively?
    > What does the modem log show for a call that stays connected
    > for a long time and moves much data?
    >
    > Aaron
    >
    > ---
    >
    > ~ Hi,
    > ~
    > ~ We've setup a C2621 (not the XM, the older) with a NM-8AM module to

    allow
    > ~ for analog dial-in for our mechanics. Setup went smooth but

    communications
    > ~ didn't. The dial-in succeeds but the connection is terribly slow. Any

    tips
    > ~ on what I can do to pinpoint the problem?
    > ~
    > ~ Could this have anything to do with mismatched (AT-commands\registers)

    and
    > ~ line setup? I noticed a "Serial flow OFF AT\Q0" and a "line- flowcontrol
    > ~ hardware" do these match? All modem settings are factory-defaults.
    > ~
    > ~ Please advise,
    > ~
    > ~ Erik
    > ~
    > ~ Here is our related config / show ... output:
    > ~
    > ~ -- Relevant async configuration sections
    > ~
    > ~ interface Loopback0
    > ~ ip address 10.240.222.113 255.255.255.240
    > ~ no ip directed-broadcast
    > ~ !
    > ~ ip local pool DIALIN 10.240.222.114 10.240.222.124
    > ~ !
    > ~ interface Group-Async1
    > ~ ip unnumbered Loopback0
    > ~ no ip directed-broadcast
    > ~ encapsulation ppp
    > ~ ip tcp header-compression passive
    > ~ dialer in-band
    > ~ dialer idle-timeout 600
    > ~ dialer-group 1
    > ~ async mode dedicated
    > ~ peer default ip address pool DIALIN
    > ~ no cdp enable
    > ~ ppp callback accept
    > ~ ppp authentication ms-chap chap
    > ~ group-range 33 36
    > ~ !
    > ~
    > ~ line 33 36
    > ~ autoselect ppp
    > ~ modem InOut
    > ~ modem autoconfigure type mica
    > ~ rotary 1
    > ~ transport input all
    > ~ escape-character NONE
    > ~ flowcontrol hardware
    > ~ !
    > ~
    > ~ -- Show version
    > ~
    > ~ Cisco Internetwork Operating System Software
    > ~ IOS (tm) C2600 Software (C2600-D-M), Version 12.0(7)T, RELEASE SOFTWARE
    > ~ (fc2)
    > ~ Copyright (c) 1986-1999 by cisco Systems, Inc.
    > ~ Compiled Tue 07-Dec-99 01:20 by phanguye
    > ~ Image text-base: 0x80008088, data-base: 0x808D24CC
    > ~
    > ~ ROM: System Bootstrap, Version 11.3(2)XA4, RELEASE SOFTWARE (fc1)
    > ~
    > ~ StarrenVegDRTR2 uptime is 3 days, 23 hours, 57 minutes
    > ~ System returned to ROM by reload at 18:05:47 UTC Tue Feb 27 2001
    > ~ System image file is "flash:c2600-d-mz.120-7.T.bin"
    > ~
    > ~ cisco 2621 (MPC860) processor (revision 0x102) with 26624K/6144K bytes

    of
    > ~ memory
    > ~ .
    > ~ Processor board ID JAD045005XI (3965570801)
    > ~ M860 processor: part number 0, mask 49
    > ~ Bridging software.
    > ~ X.25 software, Version 3.0.0.
    > ~ Basic Rate ISDN software, Version 1.1.
    > ~ 2 FastEthernet/IEEE 802.3 interface(s)
    > ~ 1 Serial network interface(s)
    > ~ 1 ISDN Basic Rate interface(s)
    > ~ 8 terminal line(s) ! (This is the NM-8AM module)
    > ~ 32K bytes of non-volatile configuration memory.
    > ~ 8192K bytes of processor board System flash (Read/Write)
    > ~
    > ~ Configuration register is 0x2102
    > ~
    > ~ -- Show modem
    > ~
    > ~ Avg Hold Inc calls Out calls Busied Failed No
    > ~ Succ
    > ~ Mdm Time Succ Fail Succ Fail Out Dial Answer
    > ~ Pct.
    > ~ 1/0 00:04:03 7 0 0 0 0 0 0
    > ~ 100%
    > ~ 1/1 00:08:37 7 1 0 0 0 0 0
    > ~ 88%
    > ~ 1/2 00:07:25 7 0 0 0 0 0 0
    > ~ 100%
    > ~ 1/3 00:06:04 8 0 0 0 0 0 0
    > ~ 100%
    > ~ ...
    > ~ -- Show modem configuration 1/0 (all others show the same output)
    > ~
    > ~ IDLE 000:01:48
    > ~ LAST DIAL
    > ~ MODEM HW: PC 2W United States
    > ~ - RTS 5 CTS 6 DSR - CD 20 DTR - RI
    > ~ MODULATION IDLE
    > ~ MODEM BPS 33600 AT%G0
    > ~ MODEM FLOW OFF AT\G0
    > ~ MODEM MODE AUT AT\N3
    > ~ BASE MODE V34 AT%M2
    > ~ V.23 OPR. OFF AT%F0
    > ~ AUTO ANS. ON ATS0=1
    > ~ SERIAL BPS 38400 AT
    > ~ BPS ADJUST OFF AT\J0
    > ~ SPT BPS ADJ. 0 AT\W0
    > ~ ANSWER MESSGS OFF ATQ2
    > ~ SERIAL FLOW OFF AT\Q0
    > ~ PASS XON/XOFF OFF AT\X0
    > ~ PARITY 8N AT
    > ~ BREAK 5 AT\K5
    > ~ EXIT CHAR 043 ATS2=43
    > ~ ANS DUMB MODE OFF AT#E0
    > ~ CMD ECHO ON ATE1
    > ~ RESULTS ON ATQ0
    > ~ RESULT TYPE MNPX ATV1\V2
    > ~ CONNECT MSG MDM ATW2
    > ~ CONN MNP- 0 AT-M0
    > ~ SPEED MATCH 1 AT%L1
    > ~ EQUALIZER 1 AT:E1
    > ~ FALLBACK 2 AT-Q2
    > ~ DATA ECHO OFF AT\E0
    > ~ INACT TIMER 00 AT\T0
    > ~ AUTO RETRAIN ON AT%E1
    > ~ COMPRESSION ALL AT%C3
    > ~ MAX BLK SIZE 256 AT\A3
    > ~ AUTO BUFF 0 AT\C0
    > ~ AUTO CHAR 000 AT%A0
    > ~ PAUSE TIME 002 ATS8=2
    > ~ DTR 2 AT&D2
    > ~ CARR DET 1 AT&C1
    > ~ DSR 0 AT\D0
    > ~ RING IND 1 AT\R1
    > ~ LEASE LINE 0 AT&L0
    > ~ LNG SPC DISC OFF ATY0
    > ~ BUSIED OUT IDLE AT*Y0
    > ~ DISC DELAY 000 AT%D0
    > ~ RDLB ENABLE OFF AT&T5
    > ~ DIAL MODE 4 ATX4
    > ~ PULSE DIAL 60% AT&P0
    > ~ PULSE MODE N AT%W0
    > ~ V23 HD EQU ON AT%O1
    > ~ GUARD TONE 0 AT&G0
    > ~ DATA CALL TONE OFF AT-C0
    > ~ 2ND FC OFF AT-F0
    > ~ NM BIT VALUE 0 AT-E0
    > ~ PAR CHK 0 AT-P0
    > ~ MANUAL DIAL 0 AT:D0
    > ~ UPSHIFT BPS OFF AT*H0
    > ~ CELLULAR OFF AT)M0
    > ~ LINETYPE 000 AT@M0
    > ~ DETECT PHASE ON AT-J1
    > ~ MNP EXT SVC 2 AT-K2
    > ~ UNIV V.23 1 AT-V1
    > ~ CONNECT MSG 1ST AT@C0
    > ~ DUMB MODE OFF AT-H0
    > ~ BELL ON ATB1
    > ~ CALL ABT DISAB OFF AT-Y0
    > ~ REVERSE ANS OFF AT-W0
    > ~ MIN CONN SPD 300 AT@U
    > ~ MU-LAW/A_LAW MU-L AT"A0
    > ~ REM CHAR 042 AT*S42
    > ~
    > ~ -- SHow modem version
    > ~
    > ~ Slot 1:MCOM Analog Integrated Modem Firmware Version 1.2.0
    > ~ Source: IOS
    > ~ Boot firmware: 1.1.5
    > ~ MIMIC firmware: 1.3.3
    > ~ Modem firmware: 2.3.8
    > ~ DSP firmware: 0.0.2
    > ~
    > ~ -- Show modem operational-status
    > ~
    > ~ MNP Class 10 V.34 Modem
    > ~ MODEM HW: PC 2W United States
    > ~ Firmware Rev 2.3.9/85
    > ~ DSP C36 Part/Rev 3635 4241
    > ~ DSP C58 Part/Rev 3635 2041
    > ~ DSP Controller Rev 0.0
    > ~ DSP Data Pump Rev 0.0
    > ~ Connect Time 000:01:48
    > ~ - RTS 5 CTS 6 DSR - CD 20 DTR - RI
    > ~ Disconnect Remote - Local - 14,9
    > ~
    > ~ Mod Type IDLE
    > ~ TX/RX Spd ***** ***** BPS
    > ~ TX/RX Spd Mask NA BFFF Hex
    > ~ Symbol Rate 2400 Hz
    > ~ TX/RX Carrier Freq 1600 1600 Hz
    > ~ TX/RX States 16 16
    > ~ TX/RX NLE OFF OFF
    > ~ TX/RX Precoding OFF OFF
    > ~ TX/RX Shaping OFF OFF
    > ~ TX Preemphasis Index 0
    > ~ TX Lvl REG - 13 dBm
    > ~ TX Lvl RAM - 0 dB
    > ~ TX Lvl Reduct 0 dB
    > ~ TX Lvl - 13 dBm
    > ~ RX Lvl - 33 dBm
    > ~ S/NR 0
    > ~ S/DR 0
    > ~ EQM 0000 Hex
    > ~ AVG EQM 0000 Hex
    > ~ Lower/Upper Edge 0 0 Hz
    > ~ Phase Jitter Freq 0 Hz
    > ~ Phase Jitter Amp 0.0 deg
    > ~ Far Echo Lvl 0 N
    > ~ Round Trip Delay 0 msec
    > ~ Dropouts > 5dB 0
    > ~ RTRNs Init/Accept 0 0
    > ~ RRENs Init/Accept 0 0
    > ~ BLER 0000 Hex
    > ~ RBS Counter 0000 Hex
    > ~ Digital Pad Detected NA
    > ~ Max SECRXB 85
    > ~ Max SECTXB 87
    > ~
    > ~ -- show modem connect-speeds 36600
    > ~
    > ~ connect speeds
    > ~
    > ~ Mdm 26400 28000 28800 29333 30667 31200 32000 33333 33600

    TotCnt
    > ~ 1/0 0 0 0 0 0 1 0 0 6

    7
    > ~ 1/1 2 0 0 0 0 1 0 0 4

    7
    > ~ 1/2 1 0 0 0 0 1 0 0 5

    7
    > ~ 1/3 1 0 0 0 0 1 0 0 6

    8
    > ~
    > ~ -- show modem log
    > ~
    > ~ Modem 1/0 Events Log:
    > ~ 2d23h DTR set low
    > ~ 2d23h Modem disabled
    > ~ 2d23h PPP escape maps set: TX map=00000000 RX map=FFFFFFFF
    > ~ 2d23h DTR set high
    > ~ 2d23h Modem enabled
    > ~ 2d23h Modem disabled
    > ~ 2d19h Modem State: Dialing/Answering
    > ~ 2d19h CSM: event-MODEM_STARTING_CONNECT New
    > ~ State-CSM_CONNECT_INITIATED_STATE
    > ~ 2d19h Modem State: Incoming ring
    > ~ 2d19h CSM: event-MODEM_ANALOG_CALL_IN New

    State-CSM_CONNECT_INITIATED_STATE
    > ~ 2d19h Hook state: Off hook
    > ~ 2d19h Modem State: Waiting for Carrier
    > ~ 2d19h Modem State: Connected
    > ~ 2d19h Connection: TX/RX Speed = 31200/24000, Modulation = V34
    > ~ Direction = Answer, Protocol = LAPM, Compression = V42bis
    > ~ 2d19h CSM: event-MODEM_CONNECTED New State-CONNECTED_STATE
    > ~ 2d19h PPP mode active
    > ~ 2d19h Modem enabled
    > ~ 2d19h PPP escape maps set: TX map=00000000 RX map=FFFFFFFF
    > ~ 2d19h PPP escape maps set: TX map=00000000 RX map=00000000
    > ~ 2d19h Modem Analog Report: TX = -13, RX = -37, Signal to noise = 33
    > ~ 2d19h Modem State: Retrain Accepted
    > ~ 2d19h Connection update: TX/RX Speed = 28800/26400, Modulation = V34
    > ~ 2d19h Modem State: Connected
    > ~ 2d19h Modem State: Disconnecting
    > ~ 2d19h CSM: event-MODEM_DISCONNECTED New State-IDLE_STATE
    > ~ 2d19h End connection: Retransmits for MNP block (TX/RX) = 0/0
    > ~ Duration = 0:00:32, Number of TX/RX char = 5039/2887
    > ~ Local Disc Reason = Remote Link Disc
    > ~ Remote Disc Reason = Unknown
    > ~ 2d19h Hook state: On hook
    > ~ 2d19h Modem State: Idle
    > ~ 2d19h DTR set low
    > ~ 2d19h DTR set low
    > ~ 2d19h Modem disabled
    > ~ 2d19h Character mode active
    > ~ 2d19h DTR set high
    > ~ 2d19h Modem enabled
    > ~ 2d19h Modem disabled
    > ~ 2d04h Modem State: Dialing/Answering
    > ~ 2d04h CSM: event-MODEM_STARTING_CONNECT New
    > ~ State-CSM_CONNECT_INITIATED_STATE
    > ~ 2d04h Modem State: Incoming ring
    > ~ 2d04h CSM: event-MODEM_ANALOG_CALL_IN New

    State-CSM_CONNECT_INITIATED_STATE
    > ~
    > ~
    > ~
    > ~
    > ~
    >
    Erik Tamminga, Apr 15, 2004
    #3
  4. On Thu, 15 Apr 2004 08:32:10 +0200, "Erik Tamminga" <> wrote:

    ~ Hi Aaron,
    ~
    ~ "Terribly slow" means you can't even work in a telnet session to the router
    ~ dialed in to and websites (local to the router, few pictures) take ages to
    ~ load. I know modem connections don't go much faster than 2-4kBps, but this
    ~ doesn't match experienced throughput. All modems that connect connect at
    ~ their expected speeds (28800, 33600, etc). Send/receive leds on the client
    ~ modems don't indicate full line usage.
    ~ I checked to make sure this is not an external problem like slow or failing
    ~ dns or bad/instable routing tables. Bad "telnet performance" to the router
    ~ dailed-in to confirms this.

    OK. Still, it would be good to collect the modem details for several
    calls to see EXACTLY what they look like - to confirm that they are
    fine at the modulation and error control layers.

    ~ For example:
    ~ dial in to router A (connected at 33k6)

    In PPP?

    ~ telnet to router A (ip address loopback, or any other address of the router)
    ~ login and do a "show start" takes ~10 seconds to fill the screen (so do
    ~ additional pages).
    ~ when typing commands (I can actually type them quite fast), I have to wait
    ~ for the characters to get echod back for ages.

    Sounds to me that you must be getting TCP retransmits and/or errored
    PPP packets and/or EC layer retransmits and/or modulation layer
    speedshifts/retrains. Look at a call like this at the TCP, PPP,
    EC and modulation layers and see where the problem is.

    ~ I can easily reproduce this behaviour because it happens ~100% of all
    ~ connects. Some people indicated a change of their local modem
    ~ errordetection/compression settings (windows 2000 dialup properties)
    ~ resulted in some better performance, but I haven't been able to confirm
    ~ this.
    ~
    ~ Currently I'm thinking this is some kind of router-line <->
    ~ modem-serial-port configuration mismatch.

    I'm skeptical, since NM-AM does not HAVE a serial port.
    The DTE link between the router and the modem blade is
    thru the PCI bus.

    ~ The reason I think this is that
    ~ the output of a show modem configuration 1/0 shows "SERIAL FLOW OFF AT\Q0"
    ~ while router-line configuration has "flowcontrol hardware" configured. Could
    ~ this impact performance?

    No.

    Aaron

    ---

    ~ "Aaron Leonard" <> wrote in message
    ~ news:...
    ~ > Everything you show below looks fine. Can you quantify
    ~ > what "terribly slow" means to you?
    ~ >
    ~ > The one call you show shows that the call trained at
    ~ > 31.2kbps transmit / 24kbps receive which is in the range
    ~ > of normalcy for V.34. It does show one retrain during
    ~ > the (short) call. If you stay connected longer (like, for
    ~ > minutes or hours), do you continue to retrain repetitively?
    ~ > What does the modem log show for a call that stays connected
    ~ > for a long time and moves much data?
    ~ >
    ~ > Aaron
    ~ >
    ~ > ---
    ~ >
    ~ > ~ Hi,
    ~ > ~
    ~ > ~ We've setup a C2621 (not the XM, the older) with a NM-8AM module to
    ~ allow
    ~ > ~ for analog dial-in for our mechanics. Setup went smooth but
    ~ communications
    ~ > ~ didn't. The dial-in succeeds but the connection is terribly slow. Any
    ~ tips
    ~ > ~ on what I can do to pinpoint the problem?
    ~ > ~
    ~ > ~ Could this have anything to do with mismatched (AT-commands\registers)
    ~ and
    ~ > ~ line setup? I noticed a "Serial flow OFF AT\Q0" and a "line- flowcontrol
    ~ > ~ hardware" do these match? All modem settings are factory-defaults.
    ~ > ~
    ~ > ~ Please advise,
    ~ > ~
    ~ > ~ Erik
    ~ > ~
    ~ > ~ Here is our related config / show ... output:
    ~ > ~
    ~ > ~ -- Relevant async configuration sections
    ~ > ~
    ~ > ~ interface Loopback0
    ~ > ~ ip address 10.240.222.113 255.255.255.240
    ~ > ~ no ip directed-broadcast
    ~ > ~ !
    ~ > ~ ip local pool DIALIN 10.240.222.114 10.240.222.124
    ~ > ~ !
    ~ > ~ interface Group-Async1
    ~ > ~ ip unnumbered Loopback0
    ~ > ~ no ip directed-broadcast
    ~ > ~ encapsulation ppp
    ~ > ~ ip tcp header-compression passive
    ~ > ~ dialer in-band
    ~ > ~ dialer idle-timeout 600
    ~ > ~ dialer-group 1
    ~ > ~ async mode dedicated
    ~ > ~ peer default ip address pool DIALIN
    ~ > ~ no cdp enable
    ~ > ~ ppp callback accept
    ~ > ~ ppp authentication ms-chap chap
    ~ > ~ group-range 33 36
    ~ > ~ !
    ~ > ~
    ~ > ~ line 33 36
    ~ > ~ autoselect ppp
    ~ > ~ modem InOut
    ~ > ~ modem autoconfigure type mica
    ~ > ~ rotary 1
    ~ > ~ transport input all
    ~ > ~ escape-character NONE
    ~ > ~ flowcontrol hardware
    ~ > ~ !
    ~ > ~
    ~ > ~ -- Show version
    ~ > ~
    ~ > ~ Cisco Internetwork Operating System Software
    ~ > ~ IOS (tm) C2600 Software (C2600-D-M), Version 12.0(7)T, RELEASE SOFTWARE
    ~ > ~ (fc2)
    ~ > ~ Copyright (c) 1986-1999 by cisco Systems, Inc.
    ~ > ~ Compiled Tue 07-Dec-99 01:20 by phanguye
    ~ > ~ Image text-base: 0x80008088, data-base: 0x808D24CC
    ~ > ~
    ~ > ~ ROM: System Bootstrap, Version 11.3(2)XA4, RELEASE SOFTWARE (fc1)
    ~ > ~
    ~ > ~ StarrenVegDRTR2 uptime is 3 days, 23 hours, 57 minutes
    ~ > ~ System returned to ROM by reload at 18:05:47 UTC Tue Feb 27 2001
    ~ > ~ System image file is "flash:c2600-d-mz.120-7.T.bin"
    ~ > ~
    ~ > ~ cisco 2621 (MPC860) processor (revision 0x102) with 26624K/6144K bytes
    ~ of
    ~ > ~ memory
    ~ > ~ .
    ~ > ~ Processor board ID JAD045005XI (3965570801)
    ~ > ~ M860 processor: part number 0, mask 49
    ~ > ~ Bridging software.
    ~ > ~ X.25 software, Version 3.0.0.
    ~ > ~ Basic Rate ISDN software, Version 1.1.
    ~ > ~ 2 FastEthernet/IEEE 802.3 interface(s)
    ~ > ~ 1 Serial network interface(s)
    ~ > ~ 1 ISDN Basic Rate interface(s)
    ~ > ~ 8 terminal line(s) ! (This is the NM-8AM module)
    ~ > ~ 32K bytes of non-volatile configuration memory.
    ~ > ~ 8192K bytes of processor board System flash (Read/Write)
    ~ > ~
    ~ > ~ Configuration register is 0x2102
    ~ > ~
    ~ > ~ -- Show modem
    ~ > ~
    ~ > ~ Avg Hold Inc calls Out calls Busied Failed No
    ~ > ~ Succ
    ~ > ~ Mdm Time Succ Fail Succ Fail Out Dial Answer
    ~ > ~ Pct.
    ~ > ~ 1/0 00:04:03 7 0 0 0 0 0 0
    ~ > ~ 100%
    ~ > ~ 1/1 00:08:37 7 1 0 0 0 0 0
    ~ > ~ 88%
    ~ > ~ 1/2 00:07:25 7 0 0 0 0 0 0
    ~ > ~ 100%
    ~ > ~ 1/3 00:06:04 8 0 0 0 0 0 0
    ~ > ~ 100%
    ~ > ~ ...
    ~ > ~ -- Show modem configuration 1/0 (all others show the same output)
    ~ > ~
    ~ > ~ IDLE 000:01:48
    ~ > ~ LAST DIAL
    ~ > ~ MODEM HW: PC 2W United States
    ~ > ~ - RTS 5 CTS 6 DSR - CD 20 DTR - RI
    ~ > ~ MODULATION IDLE
    ~ > ~ MODEM BPS 33600 AT%G0
    ~ > ~ MODEM FLOW OFF AT\G0
    ~ > ~ MODEM MODE AUT AT\N3
    ~ > ~ BASE MODE V34 AT%M2
    ~ > ~ V.23 OPR. OFF AT%F0
    ~ > ~ AUTO ANS. ON ATS0=1
    ~ > ~ SERIAL BPS 38400 AT
    ~ > ~ BPS ADJUST OFF AT\J0
    ~ > ~ SPT BPS ADJ. 0 AT\W0
    ~ > ~ ANSWER MESSGS OFF ATQ2
    ~ > ~ SERIAL FLOW OFF AT\Q0
    ~ > ~ PASS XON/XOFF OFF AT\X0
    ~ > ~ PARITY 8N AT
    ~ > ~ BREAK 5 AT\K5
    ~ > ~ EXIT CHAR 043 ATS2=43
    ~ > ~ ANS DUMB MODE OFF AT#E0
    ~ > ~ CMD ECHO ON ATE1
    ~ > ~ RESULTS ON ATQ0
    ~ > ~ RESULT TYPE MNPX ATV1\V2
    ~ > ~ CONNECT MSG MDM ATW2
    ~ > ~ CONN MNP- 0 AT-M0
    ~ > ~ SPEED MATCH 1 AT%L1
    ~ > ~ EQUALIZER 1 AT:E1
    ~ > ~ FALLBACK 2 AT-Q2
    ~ > ~ DATA ECHO OFF AT\E0
    ~ > ~ INACT TIMER 00 AT\T0
    ~ > ~ AUTO RETRAIN ON AT%E1
    ~ > ~ COMPRESSION ALL AT%C3
    ~ > ~ MAX BLK SIZE 256 AT\A3
    ~ > ~ AUTO BUFF 0 AT\C0
    ~ > ~ AUTO CHAR 000 AT%A0
    ~ > ~ PAUSE TIME 002 ATS8=2
    ~ > ~ DTR 2 AT&D2
    ~ > ~ CARR DET 1 AT&C1
    ~ > ~ DSR 0 AT\D0
    ~ > ~ RING IND 1 AT\R1
    ~ > ~ LEASE LINE 0 AT&L0
    ~ > ~ LNG SPC DISC OFF ATY0
    ~ > ~ BUSIED OUT IDLE AT*Y0
    ~ > ~ DISC DELAY 000 AT%D0
    ~ > ~ RDLB ENABLE OFF AT&T5
    ~ > ~ DIAL MODE 4 ATX4
    ~ > ~ PULSE DIAL 60% AT&P0
    ~ > ~ PULSE MODE N AT%W0
    ~ > ~ V23 HD EQU ON AT%O1
    ~ > ~ GUARD TONE 0 AT&G0
    ~ > ~ DATA CALL TONE OFF AT-C0
    ~ > ~ 2ND FC OFF AT-F0
    ~ > ~ NM BIT VALUE 0 AT-E0
    ~ > ~ PAR CHK 0 AT-P0
    ~ > ~ MANUAL DIAL 0 AT:D0
    ~ > ~ UPSHIFT BPS OFF AT*H0
    ~ > ~ CELLULAR OFF AT)M0
    ~ > ~ LINETYPE 000 AT@M0
    ~ > ~ DETECT PHASE ON AT-J1
    ~ > ~ MNP EXT SVC 2 AT-K2
    ~ > ~ UNIV V.23 1 AT-V1
    ~ > ~ CONNECT MSG 1ST AT@C0
    ~ > ~ DUMB MODE OFF AT-H0
    ~ > ~ BELL ON ATB1
    ~ > ~ CALL ABT DISAB OFF AT-Y0
    ~ > ~ REVERSE ANS OFF AT-W0
    ~ > ~ MIN CONN SPD 300 AT@U
    ~ > ~ MU-LAW/A_LAW MU-L AT"A0
    ~ > ~ REM CHAR 042 AT*S42
    ~ > ~
    ~ > ~ -- SHow modem version
    ~ > ~
    ~ > ~ Slot 1:MCOM Analog Integrated Modem Firmware Version 1.2.0
    ~ > ~ Source: IOS
    ~ > ~ Boot firmware: 1.1.5
    ~ > ~ MIMIC firmware: 1.3.3
    ~ > ~ Modem firmware: 2.3.8
    ~ > ~ DSP firmware: 0.0.2
    ~ > ~
    ~ > ~ -- Show modem operational-status
    ~ > ~
    ~ > ~ MNP Class 10 V.34 Modem
    ~ > ~ MODEM HW: PC 2W United States
    ~ > ~ Firmware Rev 2.3.9/85
    ~ > ~ DSP C36 Part/Rev 3635 4241
    ~ > ~ DSP C58 Part/Rev 3635 2041
    ~ > ~ DSP Controller Rev 0.0
    ~ > ~ DSP Data Pump Rev 0.0
    ~ > ~ Connect Time 000:01:48
    ~ > ~ - RTS 5 CTS 6 DSR - CD 20 DTR - RI
    ~ > ~ Disconnect Remote - Local - 14,9
    ~ > ~
    ~ > ~ Mod Type IDLE
    ~ > ~ TX/RX Spd ***** ***** BPS
    ~ > ~ TX/RX Spd Mask NA BFFF Hex
    ~ > ~ Symbol Rate 2400 Hz
    ~ > ~ TX/RX Carrier Freq 1600 1600 Hz
    ~ > ~ TX/RX States 16 16
    ~ > ~ TX/RX NLE OFF OFF
    ~ > ~ TX/RX Precoding OFF OFF
    ~ > ~ TX/RX Shaping OFF OFF
    ~ > ~ TX Preemphasis Index 0
    ~ > ~ TX Lvl REG - 13 dBm
    ~ > ~ TX Lvl RAM - 0 dB
    ~ > ~ TX Lvl Reduct 0 dB
    ~ > ~ TX Lvl - 13 dBm
    ~ > ~ RX Lvl - 33 dBm
    ~ > ~ S/NR 0
    ~ > ~ S/DR 0
    ~ > ~ EQM 0000 Hex
    ~ > ~ AVG EQM 0000 Hex
    ~ > ~ Lower/Upper Edge 0 0 Hz
    ~ > ~ Phase Jitter Freq 0 Hz
    ~ > ~ Phase Jitter Amp 0.0 deg
    ~ > ~ Far Echo Lvl 0 N
    ~ > ~ Round Trip Delay 0 msec
    ~ > ~ Dropouts > 5dB 0
    ~ > ~ RTRNs Init/Accept 0 0
    ~ > ~ RRENs Init/Accept 0 0
    ~ > ~ BLER 0000 Hex
    ~ > ~ RBS Counter 0000 Hex
    ~ > ~ Digital Pad Detected NA
    ~ > ~ Max SECRXB 85
    ~ > ~ Max SECTXB 87
    ~ > ~
    ~ > ~ -- show modem connect-speeds 36600
    ~ > ~
    ~ > ~ connect speeds
    ~ > ~
    ~ > ~ Mdm 26400 28000 28800 29333 30667 31200 32000 33333 33600
    ~ TotCnt
    ~ > ~ 1/0 0 0 0 0 0 1 0 0 6
    ~ 7
    ~ > ~ 1/1 2 0 0 0 0 1 0 0 4
    ~ 7
    ~ > ~ 1/2 1 0 0 0 0 1 0 0 5
    ~ 7
    ~ > ~ 1/3 1 0 0 0 0 1 0 0 6
    ~ 8
    ~ > ~
    ~ > ~ -- show modem log
    ~ > ~
    ~ > ~ Modem 1/0 Events Log:
    ~ > ~ 2d23h DTR set low
    ~ > ~ 2d23h Modem disabled
    ~ > ~ 2d23h PPP escape maps set: TX map=00000000 RX map=FFFFFFFF
    ~ > ~ 2d23h DTR set high
    ~ > ~ 2d23h Modem enabled
    ~ > ~ 2d23h Modem disabled
    ~ > ~ 2d19h Modem State: Dialing/Answering
    ~ > ~ 2d19h CSM: event-MODEM_STARTING_CONNECT New
    ~ > ~ State-CSM_CONNECT_INITIATED_STATE
    ~ > ~ 2d19h Modem State: Incoming ring
    ~ > ~ 2d19h CSM: event-MODEM_ANALOG_CALL_IN New
    ~ State-CSM_CONNECT_INITIATED_STATE
    ~ > ~ 2d19h Hook state: Off hook
    ~ > ~ 2d19h Modem State: Waiting for Carrier
    ~ > ~ 2d19h Modem State: Connected
    ~ > ~ 2d19h Connection: TX/RX Speed = 31200/24000, Modulation = V34
    ~ > ~ Direction = Answer, Protocol = LAPM, Compression = V42bis
    ~ > ~ 2d19h CSM: event-MODEM_CONNECTED New State-CONNECTED_STATE
    ~ > ~ 2d19h PPP mode active
    ~ > ~ 2d19h Modem enabled
    ~ > ~ 2d19h PPP escape maps set: TX map=00000000 RX map=FFFFFFFF
    ~ > ~ 2d19h PPP escape maps set: TX map=00000000 RX map=00000000
    ~ > ~ 2d19h Modem Analog Report: TX = -13, RX = -37, Signal to noise = 33
    ~ > ~ 2d19h Modem State: Retrain Accepted
    ~ > ~ 2d19h Connection update: TX/RX Speed = 28800/26400, Modulation = V34
    ~ > ~ 2d19h Modem State: Connected
    ~ > ~ 2d19h Modem State: Disconnecting
    ~ > ~ 2d19h CSM: event-MODEM_DISCONNECTED New State-IDLE_STATE
    ~ > ~ 2d19h End connection: Retransmits for MNP block (TX/RX) = 0/0
    ~ > ~ Duration = 0:00:32, Number of TX/RX char = 5039/2887
    ~ > ~ Local Disc Reason = Remote Link Disc
    ~ > ~ Remote Disc Reason = Unknown
    ~ > ~ 2d19h Hook state: On hook
    ~ > ~ 2d19h Modem State: Idle
    ~ > ~ 2d19h DTR set low
    ~ > ~ 2d19h DTR set low
    ~ > ~ 2d19h Modem disabled
    ~ > ~ 2d19h Character mode active
    ~ > ~ 2d19h DTR set high
    ~ > ~ 2d19h Modem enabled
    ~ > ~ 2d19h Modem disabled
    ~ > ~ 2d04h Modem State: Dialing/Answering
    ~ > ~ 2d04h CSM: event-MODEM_STARTING_CONNECT New
    ~ > ~ State-CSM_CONNECT_INITIATED_STATE
    ~ > ~ 2d04h Modem State: Incoming ring
    ~ > ~ 2d04h CSM: event-MODEM_ANALOG_CALL_IN New
    ~ State-CSM_CONNECT_INITIATED_STATE
    ~ > ~
    ~ > ~
    ~ > ~
    ~ > ~
    ~ > ~
    ~ >
    ~
    Aaron Leonard, Apr 15, 2004
    #4
  5. Hi Aaron,

    Thanks again for replying. Here is another output of show modem log. It
    displays two (sorry) short calls. Nothing specials, as far as I can see.
    Your previous reply got me thinking about the different layers ("Look at a
    call like this at the TCP, PPP, EC and modulation layers and see where the
    problem is). I changed "async mode dedicated" into "async mode interactive"
    to cut off the top two layers. This allowed me to dial into the router using
    Hyperterminal instead of the windows dial-up (PPP) adapter. The resulting
    connection was fine. I was able to issue several commands without having to
    wait for any characters to be echoed back. With this result I think the "EC
    and modulation" layers are fine and I will have to troubleshoot TCP and PPP
    further.
    Could you point me into the right direction for troubleshooting TCP/PPP? If
    the modem connection is stable, how could an extra layer PPP/TCP make a
    connection to the same router (telnet) over the same physical layer fail.
    Any known compatibility issues regarding IOS 12.0(7)T and Windows 2000/XP?

    Regards,

    Erik Tamminga (ccdp)

    StarrenVegDRTR2#sh modem log

    Modem 1/0 Events Log:
    00:13:34.836 DC session request: AT\S1
    00:08:04.592 Modem State: Dialing/Answering
    00:08:04.592 CSM: event-MODEM_STARTING_CONNECT New
    State-CSM_CONNECT_INITIATED_S
    TATE
    00:08:04.588 Modem State: Incoming ring
    00:08:04.588 CSM: event-MODEM_ANALOG_CALL_IN New
    State-CSM_CONNECT_INITIATED_STA
    TE
    00:08:03.776 Hook state: Off hook
    00:08:03.164 Modem State: Waiting for Carrier
    00:07:52.800 Modem State: Connected
    00:07:51.664 Connection: TX/RX Speed = 28800/28800, Modulation = V34
    Direction = Answer, Protocol = LAPM, Compression = V42bis
    00:07:51.668 CSM: event-MODEM_CONNECTED New State-CONNECTED_STATE
    00:07:51.640 Modem enabled
    00:07:13.116 PPP mode active
    00:07:11.116 PPP escape maps set: TX map=00000000 RX map=FFFFFFFF
    00:07:09.116 PPP escape maps set: TX map=00000000 RX map=FFFFFFFF
    00:06:56.824 Modem Analog Report: TX = -16, RX = -31, Signal to noise = 45
    00:06:56.828 Modem State: Disconnecting
    00:06:56.828 CSM: event-MODEM_DISCONNECTED New State-IDLE_STATE
    00:06:56.824 End connection: Retransmits for MNP block (TX/RX) = 0/0
    Duration = 0:00:56, Number of TX/RX char = 60/4211
    Local Disc Reason = Remote Link Disc
    Remote Disc Reason = Unknown
    00:07:18.236 Hook state: On hook
    00:07:17.584 DTR set low
    00:07:17.728 DTR set low
    00:07:17.892 Modem disabled
    00:07:18.032 Modem State: Idle
    00:07:13.260 Character mode active
    00:07:13.416 DTR set high
    00:07:13.544 Modem enabled
    00:07:07.804 Modem disabled


    Modem 1/1 Events Log:


    Modem 1/2 Events Log:


    Modem 1/3 Events Log:
    00:06:54.488 MSMP Reset
    00:06:54.520 MSMP Reset
    00:06:54.552 Modem State: Dialing/Answering
    00:06:54.584 CSM: event-MODEM_STARTING_CONNECT New
    State-CSM_CONNECT_INITIATED_S
    TATE
    00:06:54.616 Modem State: Incoming ring
    00:06:56.276 CSM: event-MODEM_ANALOG_CALL_IN New
    State-CSM_CONNECT_INITIATED_STA
    TE
    00:06:55.976 Hook state: Off hook
    00:06:55.404 Modem State: Waiting for Carrier
    00:06:45.280 Modem State: Connected
    00:06:44.236 Connection: TX/RX Speed = 26400/26400, Modulation = V34
    Direction = Answer, Protocol = LAPM, Compression = V42bis
    00:06:44.304 CSM: event-MODEM_CONNECTED New State-CONNECTED_STATE
    00:06:43.984 Modem enabled
    00:06:35.592 PPP mode active
    00:06:35.624 PPP escape maps set: TX map=00000000 RX map=FFFFFFFF
    00:06:35.656 PPP escape maps set: TX map=00000000 RX map=FFFFFFFF
    00:06:33.556 PPP escape maps set: TX map=00000000 RX map=00000000
    00:06:35.488 PPP escape maps set: TX map=00000000 RX map=FFFFFFFF
    00:06:35.860 PPP escape maps set: TX map=00000000 RX map=00000000
    00:01:12.420 Modem Analog Report: TX = -16, RX = -31, Signal to noise = 54
    00:01:12.456 Modem State: Disconnecting
    00:01:12.484 CSM: event-MODEM_DISCONNECTED New State-IDLE_STATE
    00:01:12.512 End connection: Retransmits for MNP block (TX/RX) = 0/0
    Duration = 0:05:37, Number of TX/RX char = 14548/10506
    Local Disc Reason = Remote Link Disc
    Remote Disc Reason = Unknown
    00:01:12.144 Hook state: On hook
    00:01:11.680 DTR set low
    00:01:11.712 DTR set low
    00:01:11.736 Modem disabled
    00:01:11.416 Modem State: Idle
    00:01:17.432 PPP escape maps set: TX map=00000000 RX map=FFFFFFFF
    00:01:13.708 Character mode active
    00:01:13.740 DTR set high
    00:01:13.768 Modem enabled
    00:01:07.936 Modem disabled

    StarrenVegDRTR2#


    "Aaron Leonard" <> wrote in message
    news:...
    > On Thu, 15 Apr 2004 08:32:10 +0200, "Erik Tamminga"

    <> wrote:
    >
    > ~ Hi Aaron,
    > ~
    > ~ "Terribly slow" means you can't even work in a telnet session to the

    router
    > ~ dialed in to and websites (local to the router, few pictures) take ages

    to
    > ~ load. I know modem connections don't go much faster than 2-4kBps, but

    this
    > ~ doesn't match experienced throughput. All modems that connect connect at
    > ~ their expected speeds (28800, 33600, etc). Send/receive leds on the

    client
    > ~ modems don't indicate full line usage.
    > ~ I checked to make sure this is not an external problem like slow or

    failing
    > ~ dns or bad/instable routing tables. Bad "telnet performance" to the

    router
    > ~ dailed-in to confirms this.
    >
    > OK. Still, it would be good to collect the modem details for several
    > calls to see EXACTLY what they look like - to confirm that they are
    > fine at the modulation and error control layers.
    >
    > ~ For example:
    > ~ dial in to router A (connected at 33k6)
    >
    > In PPP?
    >
    > ~ telnet to router A (ip address loopback, or any other address of the

    router)
    > ~ login and do a "show start" takes ~10 seconds to fill the screen (so do
    > ~ additional pages).
    > ~ when typing commands (I can actually type them quite fast), I have to

    wait
    > ~ for the characters to get echod back for ages.
    >
    > Sounds to me that you must be getting TCP retransmits and/or errored
    > PPP packets and/or EC layer retransmits and/or modulation layer
    > speedshifts/retrains. Look at a call like this at the TCP, PPP,
    > EC and modulation layers and see where the problem is.
    >
    > ~ I can easily reproduce this behaviour because it happens ~100% of all
    > ~ connects. Some people indicated a change of their local modem
    > ~ errordetection/compression settings (windows 2000 dialup properties)
    > ~ resulted in some better performance, but I haven't been able to confirm
    > ~ this.
    > ~
    > ~ Currently I'm thinking this is some kind of router-line <->
    > ~ modem-serial-port configuration mismatch.
    >
    > I'm skeptical, since NM-AM does not HAVE a serial port.
    > The DTE link between the router and the modem blade is
    > thru the PCI bus.
    >
    > ~ The reason I think this is that
    > ~ the output of a show modem configuration 1/0 shows "SERIAL FLOW OFF

    AT\Q0"
    > ~ while router-line configuration has "flowcontrol hardware" configured.

    Could
    > ~ this impact performance?
    >
    > No.
    >
    > Aaron
    >
    > ---
    >
    > ~ "Aaron Leonard" <> wrote in message
    > ~ news:...
    > ~ > Everything you show below looks fine. Can you quantify
    > ~ > what "terribly slow" means to you?
    > ~ >
    > ~ > The one call you show shows that the call trained at
    > ~ > 31.2kbps transmit / 24kbps receive which is in the range
    > ~ > of normalcy for V.34. It does show one retrain during
    > ~ > the (short) call. If you stay connected longer (like, for
    > ~ > minutes or hours), do you continue to retrain repetitively?
    > ~ > What does the modem log show for a call that stays connected
    > ~ > for a long time and moves much data?
    > ~ >
    > ~ > Aaron
    > ~ >
    > ~ > ---
    > ~ >
    > ~ > ~ Hi,
    > ~ > ~
    > ~ > ~ We've setup a C2621 (not the XM, the older) with a NM-8AM module to
    > ~ allow
    > ~ > ~ for analog dial-in for our mechanics. Setup went smooth but
    > ~ communications
    > ~ > ~ didn't. The dial-in succeeds but the connection is terribly slow.

    Any
    > ~ tips
    > ~ > ~ on what I can do to pinpoint the problem?
    > ~ > ~
    > ~ > ~ Could this have anything to do with mismatched

    (AT-commands\registers)
    > ~ and
    > ~ > ~ line setup? I noticed a "Serial flow OFF AT\Q0" and a "line-

    flowcontrol
    > ~ > ~ hardware" do these match? All modem settings are factory-defaults.
    > ~ > ~
    > ~ > ~ Please advise,
    > ~ > ~
    > ~ > ~ Erik
    > ~ > ~
    > ~ > ~ Here is our related config / show ... output:
    > ~ > ~
    > ~ > ~ -- Relevant async configuration sections
    > ~ > ~
    > ~ > ~ interface Loopback0
    > ~ > ~ ip address 10.240.222.113 255.255.255.240
    > ~ > ~ no ip directed-broadcast
    > ~ > ~ !
    > ~ > ~ ip local pool DIALIN 10.240.222.114 10.240.222.124
    > ~ > ~ !
    > ~ > ~ interface Group-Async1
    > ~ > ~ ip unnumbered Loopback0
    > ~ > ~ no ip directed-broadcast
    > ~ > ~ encapsulation ppp
    > ~ > ~ ip tcp header-compression passive
    > ~ > ~ dialer in-band
    > ~ > ~ dialer idle-timeout 600
    > ~ > ~ dialer-group 1
    > ~ > ~ async mode dedicated
    > ~ > ~ peer default ip address pool DIALIN
    > ~ > ~ no cdp enable
    > ~ > ~ ppp callback accept
    > ~ > ~ ppp authentication ms-chap chap
    > ~ > ~ group-range 33 36
    > ~ > ~ !
    > ~ > ~
    > ~ > ~ line 33 36
    > ~ > ~ autoselect ppp
    > ~ > ~ modem InOut
    > ~ > ~ modem autoconfigure type mica
    > ~ > ~ rotary 1
    > ~ > ~ transport input all
    > ~ > ~ escape-character NONE
    > ~ > ~ flowcontrol hardware
    > ~ > ~ !
    > ~ > ~
    > ~ > ~ -- Show version
    > ~ > ~
    > ~ > ~ Cisco Internetwork Operating System Software
    > ~ > ~ IOS (tm) C2600 Software (C2600-D-M), Version 12.0(7)T, RELEASE

    SOFTWARE
    > ~ > ~ (fc2)
    > ~ > ~ Copyright (c) 1986-1999 by cisco Systems, Inc.
    > ~ > ~ Compiled Tue 07-Dec-99 01:20 by phanguye
    > ~ > ~ Image text-base: 0x80008088, data-base: 0x808D24CC
    > ~ > ~
    > ~ > ~ ROM: System Bootstrap, Version 11.3(2)XA4, RELEASE SOFTWARE (fc1)
    > ~ > ~
    > ~ > ~ StarrenVegDRTR2 uptime is 3 days, 23 hours, 57 minutes
    > ~ > ~ System returned to ROM by reload at 18:05:47 UTC Tue Feb 27 2001
    > ~ > ~ System image file is "flash:c2600-d-mz.120-7.T.bin"
    > ~ > ~
    > ~ > ~ cisco 2621 (MPC860) processor (revision 0x102) with 26624K/6144K

    bytes
    > ~ of
    > ~ > ~ memory
    > ~ > ~ .
    > ~ > ~ Processor board ID JAD045005XI (3965570801)
    > ~ > ~ M860 processor: part number 0, mask 49
    > ~ > ~ Bridging software.
    > ~ > ~ X.25 software, Version 3.0.0.
    > ~ > ~ Basic Rate ISDN software, Version 1.1.
    > ~ > ~ 2 FastEthernet/IEEE 802.3 interface(s)
    > ~ > ~ 1 Serial network interface(s)
    > ~ > ~ 1 ISDN Basic Rate interface(s)
    > ~ > ~ 8 terminal line(s) ! (This is the NM-8AM module)
    > ~ > ~ 32K bytes of non-volatile configuration memory.
    > ~ > ~ 8192K bytes of processor board System flash (Read/Write)
    > ~ > ~
    > ~ > ~ Configuration register is 0x2102
    > ~ > ~
    > ~ > ~ -- Show modem
    > ~ > ~
    > ~ > ~ Avg Hold Inc calls Out calls Busied Failed

    No
    > ~ > ~ Succ
    > ~ > ~ Mdm Time Succ Fail Succ Fail Out Dial

    Answer
    > ~ > ~ Pct.
    > ~ > ~ 1/0 00:04:03 7 0 0 0 0 0

    0
    > ~ > ~ 100%
    > ~ > ~ 1/1 00:08:37 7 1 0 0 0 0

    0
    > ~ > ~ 88%
    > ~ > ~ 1/2 00:07:25 7 0 0 0 0 0

    0
    > ~ > ~ 100%
    > ~ > ~ 1/3 00:06:04 8 0 0 0 0 0

    0
    > ~ > ~ 100%
    > ~ > ~ ...
    > ~ > ~ -- Show modem configuration 1/0 (all others show the same output)
    > ~ > ~
    > ~ > ~ IDLE 000:01:48
    > ~ > ~ LAST DIAL
    > ~ > ~ MODEM HW: PC 2W United States
    > ~ > ~ - RTS 5 CTS 6 DSR - CD 20 DTR - RI
    > ~ > ~ MODULATION IDLE
    > ~ > ~ MODEM BPS 33600 AT%G0
    > ~ > ~ MODEM FLOW OFF AT\G0
    > ~ > ~ MODEM MODE AUT AT\N3
    > ~ > ~ BASE MODE V34 AT%M2
    > ~ > ~ V.23 OPR. OFF AT%F0
    > ~ > ~ AUTO ANS. ON ATS0=1
    > ~ > ~ SERIAL BPS 38400 AT
    > ~ > ~ BPS ADJUST OFF AT\J0
    > ~ > ~ SPT BPS ADJ. 0 AT\W0
    > ~ > ~ ANSWER MESSGS OFF ATQ2
    > ~ > ~ SERIAL FLOW OFF AT\Q0
    > ~ > ~ PASS XON/XOFF OFF AT\X0
    > ~ > ~ PARITY 8N AT
    > ~ > ~ BREAK 5 AT\K5
    > ~ > ~ EXIT CHAR 043 ATS2=43
    > ~ > ~ ANS DUMB MODE OFF AT#E0
    > ~ > ~ CMD ECHO ON ATE1
    > ~ > ~ RESULTS ON ATQ0
    > ~ > ~ RESULT TYPE MNPX ATV1\V2
    > ~ > ~ CONNECT MSG MDM ATW2
    > ~ > ~ CONN MNP- 0 AT-M0
    > ~ > ~ SPEED MATCH 1 AT%L1
    > ~ > ~ EQUALIZER 1 AT:E1
    > ~ > ~ FALLBACK 2 AT-Q2
    > ~ > ~ DATA ECHO OFF AT\E0
    > ~ > ~ INACT TIMER 00 AT\T0
    > ~ > ~ AUTO RETRAIN ON AT%E1
    > ~ > ~ COMPRESSION ALL AT%C3
    > ~ > ~ MAX BLK SIZE 256 AT\A3
    > ~ > ~ AUTO BUFF 0 AT\C0
    > ~ > ~ AUTO CHAR 000 AT%A0
    > ~ > ~ PAUSE TIME 002 ATS8=2
    > ~ > ~ DTR 2 AT&D2
    > ~ > ~ CARR DET 1 AT&C1
    > ~ > ~ DSR 0 AT\D0
    > ~ > ~ RING IND 1 AT\R1
    > ~ > ~ LEASE LINE 0 AT&L0
    > ~ > ~ LNG SPC DISC OFF ATY0
    > ~ > ~ BUSIED OUT IDLE AT*Y0
    > ~ > ~ DISC DELAY 000 AT%D0
    > ~ > ~ RDLB ENABLE OFF AT&T5
    > ~ > ~ DIAL MODE 4 ATX4
    > ~ > ~ PULSE DIAL 60% AT&P0
    > ~ > ~ PULSE MODE N AT%W0
    > ~ > ~ V23 HD EQU ON AT%O1
    > ~ > ~ GUARD TONE 0 AT&G0
    > ~ > ~ DATA CALL TONE OFF AT-C0
    > ~ > ~ 2ND FC OFF AT-F0
    > ~ > ~ NM BIT VALUE 0 AT-E0
    > ~ > ~ PAR CHK 0 AT-P0
    > ~ > ~ MANUAL DIAL 0 AT:D0
    > ~ > ~ UPSHIFT BPS OFF AT*H0
    > ~ > ~ CELLULAR OFF AT)M0
    > ~ > ~ LINETYPE 000 AT@M0
    > ~ > ~ DETECT PHASE ON AT-J1
    > ~ > ~ MNP EXT SVC 2 AT-K2
    > ~ > ~ UNIV V.23 1 AT-V1
    > ~ > ~ CONNECT MSG 1ST AT@C0
    > ~ > ~ DUMB MODE OFF AT-H0
    > ~ > ~ BELL ON ATB1
    > ~ > ~ CALL ABT DISAB OFF AT-Y0
    > ~ > ~ REVERSE ANS OFF AT-W0
    > ~ > ~ MIN CONN SPD 300 AT@U
    > ~ > ~ MU-LAW/A_LAW MU-L AT"A0
    > ~ > ~ REM CHAR 042 AT*S42
    > ~ > ~
    > ~ > ~ -- SHow modem version
    > ~ > ~
    > ~ > ~ Slot 1:MCOM Analog Integrated Modem Firmware Version 1.2.0
    > ~ > ~ Source: IOS
    > ~ > ~ Boot firmware: 1.1.5
    > ~ > ~ MIMIC firmware: 1.3.3
    > ~ > ~ Modem firmware: 2.3.8
    > ~ > ~ DSP firmware: 0.0.2
    > ~ > ~
    > ~ > ~ -- Show modem operational-status
    > ~ > ~
    > ~ > ~ MNP Class 10 V.34 Modem
    > ~ > ~ MODEM HW: PC 2W United States
    > ~ > ~ Firmware Rev 2.3.9/85
    > ~ > ~ DSP C36 Part/Rev 3635 4241
    > ~ > ~ DSP C58 Part/Rev 3635 2041
    > ~ > ~ DSP Controller Rev 0.0
    > ~ > ~ DSP Data Pump Rev 0.0
    > ~ > ~ Connect Time 000:01:48
    > ~ > ~ - RTS 5 CTS 6 DSR - CD 20 DTR - RI
    > ~ > ~ Disconnect Remote - Local - 14,9
    > ~ > ~
    > ~ > ~ Mod Type IDLE
    > ~ > ~ TX/RX Spd ***** ***** BPS
    > ~ > ~ TX/RX Spd Mask NA BFFF Hex
    > ~ > ~ Symbol Rate 2400 Hz
    > ~ > ~ TX/RX Carrier Freq 1600 1600 Hz
    > ~ > ~ TX/RX States 16 16
    > ~ > ~ TX/RX NLE OFF OFF
    > ~ > ~ TX/RX Precoding OFF OFF
    > ~ > ~ TX/RX Shaping OFF OFF
    > ~ > ~ TX Preemphasis Index 0
    > ~ > ~ TX Lvl REG - 13 dBm
    > ~ > ~ TX Lvl RAM - 0 dB
    > ~ > ~ TX Lvl Reduct 0 dB
    > ~ > ~ TX Lvl - 13 dBm
    > ~ > ~ RX Lvl - 33 dBm
    > ~ > ~ S/NR 0
    > ~ > ~ S/DR 0
    > ~ > ~ EQM 0000 Hex
    > ~ > ~ AVG EQM 0000 Hex
    > ~ > ~ Lower/Upper Edge 0 0 Hz
    > ~ > ~ Phase Jitter Freq 0 Hz
    > ~ > ~ Phase Jitter Amp 0.0 deg
    > ~ > ~ Far Echo Lvl 0 N
    > ~ > ~ Round Trip Delay 0 msec
    > ~ > ~ Dropouts > 5dB 0
    > ~ > ~ RTRNs Init/Accept 0 0
    > ~ > ~ RRENs Init/Accept 0 0
    > ~ > ~ BLER 0000 Hex
    > ~ > ~ RBS Counter 0000 Hex
    > ~ > ~ Digital Pad Detected NA
    > ~ > ~ Max SECRXB 85
    > ~ > ~ Max SECTXB 87
    > ~ > ~
    > ~ > ~ -- show modem connect-speeds 36600
    > ~ > ~
    > ~ > ~ connect speeds
    > ~ > ~
    > ~ > ~ Mdm 26400 28000 28800 29333 30667 31200 32000 33333

    33600
    > ~ TotCnt
    > ~ > ~ 1/0 0 0 0 0 0 1 0 0

    6
    > ~ 7
    > ~ > ~ 1/1 2 0 0 0 0 1 0 0

    4
    > ~ 7
    > ~ > ~ 1/2 1 0 0 0 0 1 0 0

    5
    > ~ 7
    > ~ > ~ 1/3 1 0 0 0 0 1 0 0

    6
    > ~ 8
    > ~ > ~
    > ~ > ~ -- show modem log
    > ~ > ~
    > ~ > ~ Modem 1/0 Events Log:
    > ~ > ~ 2d23h DTR set low
    > ~ > ~ 2d23h Modem disabled
    > ~ > ~ 2d23h PPP escape maps set: TX map=00000000 RX map=FFFFFFFF
    > ~ > ~ 2d23h DTR set high
    > ~ > ~ 2d23h Modem enabled
    > ~ > ~ 2d23h Modem disabled
    > ~ > ~ 2d19h Modem State: Dialing/Answering
    > ~ > ~ 2d19h CSM: event-MODEM_STARTING_CONNECT New
    > ~ > ~ State-CSM_CONNECT_INITIATED_STATE
    > ~ > ~ 2d19h Modem State: Incoming ring
    > ~ > ~ 2d19h CSM: event-MODEM_ANALOG_CALL_IN New
    > ~ State-CSM_CONNECT_INITIATED_STATE
    > ~ > ~ 2d19h Hook state: Off hook
    > ~ > ~ 2d19h Modem State: Waiting for Carrier
    > ~ > ~ 2d19h Modem State: Connected
    > ~ > ~ 2d19h Connection: TX/RX Speed = 31200/24000, Modulation = V34
    > ~ > ~ Direction = Answer, Protocol = LAPM, Compression =

    V42bis
    > ~ > ~ 2d19h CSM: event-MODEM_CONNECTED New State-CONNECTED_STATE
    > ~ > ~ 2d19h PPP mode active
    > ~ > ~ 2d19h Modem enabled
    > ~ > ~ 2d19h PPP escape maps set: TX map=00000000 RX map=FFFFFFFF
    > ~ > ~ 2d19h PPP escape maps set: TX map=00000000 RX map=00000000
    > ~ > ~ 2d19h Modem Analog Report: TX = -13, RX = -37, Signal to noise = 33
    > ~ > ~ 2d19h Modem State: Retrain Accepted
    > ~ > ~ 2d19h Connection update: TX/RX Speed = 28800/26400, Modulation = V34
    > ~ > ~ 2d19h Modem State: Connected
    > ~ > ~ 2d19h Modem State: Disconnecting
    > ~ > ~ 2d19h CSM: event-MODEM_DISCONNECTED New State-IDLE_STATE
    > ~ > ~ 2d19h End connection: Retransmits for MNP block (TX/RX) = 0/0
    > ~ > ~ Duration = 0:00:32, Number of TX/RX char = 5039/2887
    > ~ > ~ Local Disc Reason = Remote Link Disc
    > ~ > ~ Remote Disc Reason = Unknown
    > ~ > ~ 2d19h Hook state: On hook
    > ~ > ~ 2d19h Modem State: Idle
    > ~ > ~ 2d19h DTR set low
    > ~ > ~ 2d19h DTR set low
    > ~ > ~ 2d19h Modem disabled
    > ~ > ~ 2d19h Character mode active
    > ~ > ~ 2d19h DTR set high
    > ~ > ~ 2d19h Modem enabled
    > ~ > ~ 2d19h Modem disabled
    > ~ > ~ 2d04h Modem State: Dialing/Answering
    > ~ > ~ 2d04h CSM: event-MODEM_STARTING_CONNECT New
    > ~ > ~ State-CSM_CONNECT_INITIATED_STATE
    > ~ > ~ 2d04h Modem State: Incoming ring
    > ~ > ~ 2d04h CSM: event-MODEM_ANALOG_CALL_IN New
    > ~ State-CSM_CONNECT_INITIATED_STATE
    > ~ > ~
    > ~ > ~
    > ~ > ~
    > ~ > ~
    > ~ > ~
    > ~ >
    > ~
    >
    Erik Tamminga, Apr 15, 2004
    #5
  6. Erik Tamminga

    Ivan Ostres Guest

    In article <c5n0vu$pa6$1.nb.home.nl>,
    says...

    [call 1]
    > 00:07:51.664 Connection: TX/RX Speed = 28800/28800, Modulation = V34
    > Direction = Answer, Protocol = LAPM, Compression = V42bis
    > 00:07:51.668 CSM: event-MODEM_CONNECTED New State-CONNECTED_STATE
    > 00:07:51.640 Modem enabled
    > 00:07:13.116 PPP mode active
    > 00:07:11.116 PPP escape maps set: TX map=00000000 RX map=FFFFFFFF
    > 00:07:09.116 PPP escape maps set: TX map=00000000 RX map=FFFFFFFF
    > 00:06:56.824 Modem Analog Report: TX = -16, RX = -31, Signal to noise = 45
    >

    [/call 1]

    [call 2]
    > 00:06:44.236 Connection: TX/RX Speed = 26400/26400, Modulation = V34
    > Direction = Answer, Protocol = LAPM, Compression = V42bis
    > 00:06:44.304 CSM: event-MODEM_CONNECTED New State-CONNECTED_STATE
    > 00:06:43.984 Modem enabled
    > 00:06:35.592 PPP mode active
    > 00:01:12.420 Modem Analog Report: TX = -16, RX = -31, Signal to noise = 54

    [/call 2]

    So, IMHO, It's kind of a noisy line (look at S/N), but then again, if
    that's T1, the noise is probably on PC+modem side.


    --
    Ivan
    Ivan Ostres, Apr 16, 2004
    #6
  7. Hi,

    Thanks for the tip. I'll keep a close look to the S/N ratio. But meanwhile,
    I found the real problem to the bad performance we experienced.
    The problem was PPP compression. I added a line "compress mppc" to the
    group-async interface and that solved my performance issues. Somehow IOS
    12.0(7)T doesn't negotiate the correct compression algorithm or the chosen
    compression algorithm in IOS/W2K behaves incorrectly.

    But again, thanks to all that helped me.

    Erik


    "Ivan Ostres" <> wrote in message
    news:c5o2o1$3qhkf$-berlin.de...
    > In article <c5n0vu$pa6$1.nb.home.nl>,
    > says...
    >
    > [call 1]
    > > 00:07:51.664 Connection: TX/RX Speed = 28800/28800, Modulation = V34
    > > Direction = Answer, Protocol = LAPM, Compression = V42bis
    > > 00:07:51.668 CSM: event-MODEM_CONNECTED New State-CONNECTED_STATE
    > > 00:07:51.640 Modem enabled
    > > 00:07:13.116 PPP mode active
    > > 00:07:11.116 PPP escape maps set: TX map=00000000 RX map=FFFFFFFF
    > > 00:07:09.116 PPP escape maps set: TX map=00000000 RX map=FFFFFFFF
    > > 00:06:56.824 Modem Analog Report: TX = -16, RX = -31, Signal to noise =

    45
    > >

    > [/call 1]
    >
    > [call 2]
    > > 00:06:44.236 Connection: TX/RX Speed = 26400/26400, Modulation = V34
    > > Direction = Answer, Protocol = LAPM, Compression = V42bis
    > > 00:06:44.304 CSM: event-MODEM_CONNECTED New State-CONNECTED_STATE
    > > 00:06:43.984 Modem enabled
    > > 00:06:35.592 PPP mode active
    > > 00:01:12.420 Modem Analog Report: TX = -16, RX = -31, Signal to noise =

    54
    > [/call 2]
    >
    > So, IMHO, It's kind of a noisy line (look at S/N), but then again, if
    > that's T1, the noise is probably on PC+modem side.
    >
    >
    > --
    > Ivan
    Erik Tamminga, Apr 16, 2004
    #7
  8. Hi Eric,

    ~ Thanks again for replying. Here is another output of show modem log. It
    ~ displays two (sorry) short calls. Nothing specials, as far as I can see.

    I agree, these logs indicate that things are fine at the modem
    (modulation/EC) layer.

    ~ Your previous reply got me thinking about the different layers ("Look at a
    ~ call like this at the TCP, PPP, EC and modulation layers and see where the
    ~ problem is). I changed "async mode dedicated" into "async mode interactive"
    ~ to cut off the top two layers. This allowed me to dial into the router using
    ~ Hyperterminal instead of the windows dial-up (PPP) adapter. The resulting
    ~ connection was fine.

    Good test. That's the one I always do to prove that the router
    line and the modem link below it are fine.

    I was able to issue several commands without having to
    ~ wait for any characters to be echoed back. With this result I think the "EC
    ~ and modulation" layers are fine and I will have to troubleshoot TCP and PPP
    ~ further.

    Yep. Actually there are three layers there, TCP/IP/PPP.

    ~ Could you point me into the right direction for troubleshooting TCP/PPP? If
    ~ the modem connection is stable, how could an extra layer PPP/TCP make a
    ~ connection to the same router (telnet) over the same physical layer fail.
    ~ Any known compatibility issues regarding IOS 12.0(7)T and Windows 2000/XP?

    Well, it's odd that you should have fine performance on the async line
    but not using TCP/IP/PPP ... but not unheard of!

    My next test would be to bring up the PPP link to the router. While
    telnetted into the router from the LAN side, turn on "debug ppp packet",
    "debug dialer packet" and "debug ip packet" to an access list that
    matches packets only to/from the client IP address.

    debugging advice in general: use

    conf term
    no logging console
    no logging rate-limit
    service timestamp debug date msec
    logging buffered 50000 debug

    Then show log after the event to see what happened ... this is the best
    way to avoid losing any debugging info.

    Do a ping from the router to the client (or vice versa). Are you losing
    any? Are the RTTs in the range you would expect (80-250 msec)? If there
    are problems, do a "show interface async<n>" and do a "modem at s/p" then
    AT@E1 while the call is connected.

    I can't think offhand why you should have any particular problem with
    12.0(7)T, but on general principle you might try upgrading to most recent
    12.1 mainline, as it is basically 12.0(7)T with many generations of
    bugfixes applied.


    Aaron

    ---

    ~ Regards,
    ~
    ~ Erik Tamminga (ccdp)
    ~
    ~ StarrenVegDRTR2#sh modem log
    ~
    ~ Modem 1/0 Events Log:
    ~ 00:13:34.836 DC session request: AT\S1
    ~ 00:08:04.592 Modem State: Dialing/Answering
    ~ 00:08:04.592 CSM: event-MODEM_STARTING_CONNECT New
    ~ State-CSM_CONNECT_INITIATED_S
    ~ TATE
    ~ 00:08:04.588 Modem State: Incoming ring
    ~ 00:08:04.588 CSM: event-MODEM_ANALOG_CALL_IN New
    ~ State-CSM_CONNECT_INITIATED_STA
    ~ TE
    ~ 00:08:03.776 Hook state: Off hook
    ~ 00:08:03.164 Modem State: Waiting for Carrier
    ~ 00:07:52.800 Modem State: Connected
    ~ 00:07:51.664 Connection: TX/RX Speed = 28800/28800, Modulation = V34
    ~ Direction = Answer, Protocol = LAPM, Compression = V42bis
    ~ 00:07:51.668 CSM: event-MODEM_CONNECTED New State-CONNECTED_STATE
    ~ 00:07:51.640 Modem enabled
    ~ 00:07:13.116 PPP mode active
    ~ 00:07:11.116 PPP escape maps set: TX map=00000000 RX map=FFFFFFFF
    ~ 00:07:09.116 PPP escape maps set: TX map=00000000 RX map=FFFFFFFF
    ~ 00:06:56.824 Modem Analog Report: TX = -16, RX = -31, Signal to noise = 45
    ~ 00:06:56.828 Modem State: Disconnecting
    ~ 00:06:56.828 CSM: event-MODEM_DISCONNECTED New State-IDLE_STATE
    ~ 00:06:56.824 End connection: Retransmits for MNP block (TX/RX) = 0/0
    ~ Duration = 0:00:56, Number of TX/RX char = 60/4211
    ~ Local Disc Reason = Remote Link Disc
    ~ Remote Disc Reason = Unknown
    ~ 00:07:18.236 Hook state: On hook
    ~ 00:07:17.584 DTR set low
    ~ 00:07:17.728 DTR set low
    ~ 00:07:17.892 Modem disabled
    ~ 00:07:18.032 Modem State: Idle
    ~ 00:07:13.260 Character mode active
    ~ 00:07:13.416 DTR set high
    ~ 00:07:13.544 Modem enabled
    ~ 00:07:07.804 Modem disabled
    ~
    ~
    ~ Modem 1/1 Events Log:
    ~
    ~
    ~ Modem 1/2 Events Log:
    ~
    ~
    ~ Modem 1/3 Events Log:
    ~ 00:06:54.488 MSMP Reset
    ~ 00:06:54.520 MSMP Reset
    ~ 00:06:54.552 Modem State: Dialing/Answering
    ~ 00:06:54.584 CSM: event-MODEM_STARTING_CONNECT New
    ~ State-CSM_CONNECT_INITIATED_S
    ~ TATE
    ~ 00:06:54.616 Modem State: Incoming ring
    ~ 00:06:56.276 CSM: event-MODEM_ANALOG_CALL_IN New
    ~ State-CSM_CONNECT_INITIATED_STA
    ~ TE
    ~ 00:06:55.976 Hook state: Off hook
    ~ 00:06:55.404 Modem State: Waiting for Carrier
    ~ 00:06:45.280 Modem State: Connected
    ~ 00:06:44.236 Connection: TX/RX Speed = 26400/26400, Modulation = V34
    ~ Direction = Answer, Protocol = LAPM, Compression = V42bis
    ~ 00:06:44.304 CSM: event-MODEM_CONNECTED New State-CONNECTED_STATE
    ~ 00:06:43.984 Modem enabled
    ~ 00:06:35.592 PPP mode active
    ~ 00:06:35.624 PPP escape maps set: TX map=00000000 RX map=FFFFFFFF
    ~ 00:06:35.656 PPP escape maps set: TX map=00000000 RX map=FFFFFFFF
    ~ 00:06:33.556 PPP escape maps set: TX map=00000000 RX map=00000000
    ~ 00:06:35.488 PPP escape maps set: TX map=00000000 RX map=FFFFFFFF
    ~ 00:06:35.860 PPP escape maps set: TX map=00000000 RX map=00000000
    ~ 00:01:12.420 Modem Analog Report: TX = -16, RX = -31, Signal to noise = 54
    ~ 00:01:12.456 Modem State: Disconnecting
    ~ 00:01:12.484 CSM: event-MODEM_DISCONNECTED New State-IDLE_STATE
    ~ 00:01:12.512 End connection: Retransmits for MNP block (TX/RX) = 0/0
    ~ Duration = 0:05:37, Number of TX/RX char = 14548/10506
    ~ Local Disc Reason = Remote Link Disc
    ~ Remote Disc Reason = Unknown
    ~ 00:01:12.144 Hook state: On hook
    ~ 00:01:11.680 DTR set low
    ~ 00:01:11.712 DTR set low
    ~ 00:01:11.736 Modem disabled
    ~ 00:01:11.416 Modem State: Idle
    ~ 00:01:17.432 PPP escape maps set: TX map=00000000 RX map=FFFFFFFF
    ~ 00:01:13.708 Character mode active
    ~ 00:01:13.740 DTR set high
    ~ 00:01:13.768 Modem enabled
    ~ 00:01:07.936 Modem disabled
    ~
    ~ StarrenVegDRTR2#
    ~
    ~
    ~ "Aaron Leonard" <> wrote in message
    ~ news:...
    ~ > On Thu, 15 Apr 2004 08:32:10 +0200, "Erik Tamminga"
    ~ <> wrote:
    ~ >
    ~ > ~ Hi Aaron,
    ~ > ~
    ~ > ~ "Terribly slow" means you can't even work in a telnet session to the
    ~ router
    ~ > ~ dialed in to and websites (local to the router, few pictures) take ages
    ~ to
    ~ > ~ load. I know modem connections don't go much faster than 2-4kBps, but
    ~ this
    ~ > ~ doesn't match experienced throughput. All modems that connect connect at
    ~ > ~ their expected speeds (28800, 33600, etc). Send/receive leds on the
    ~ client
    ~ > ~ modems don't indicate full line usage.
    ~ > ~ I checked to make sure this is not an external problem like slow or
    ~ failing
    ~ > ~ dns or bad/instable routing tables. Bad "telnet performance" to the
    ~ router
    ~ > ~ dailed-in to confirms this.
    ~ >
    ~ > OK. Still, it would be good to collect the modem details for several
    ~ > calls to see EXACTLY what they look like - to confirm that they are
    ~ > fine at the modulation and error control layers.
    ~ >
    ~ > ~ For example:
    ~ > ~ dial in to router A (connected at 33k6)
    ~ >
    ~ > In PPP?
    ~ >
    ~ > ~ telnet to router A (ip address loopback, or any other address of the
    ~ router)
    ~ > ~ login and do a "show start" takes ~10 seconds to fill the screen (so do
    ~ > ~ additional pages).
    ~ > ~ when typing commands (I can actually type them quite fast), I have to
    ~ wait
    ~ > ~ for the characters to get echod back for ages.
    ~ >
    ~ > Sounds to me that you must be getting TCP retransmits and/or errored
    ~ > PPP packets and/or EC layer retransmits and/or modulation layer
    ~ > speedshifts/retrains. Look at a call like this at the TCP, PPP,
    ~ > EC and modulation layers and see where the problem is.
    ~ >
    ~ > ~ I can easily reproduce this behaviour because it happens ~100% of all
    ~ > ~ connects. Some people indicated a change of their local modem
    ~ > ~ errordetection/compression settings (windows 2000 dialup properties)
    ~ > ~ resulted in some better performance, but I haven't been able to confirm
    ~ > ~ this.
    ~ > ~
    ~ > ~ Currently I'm thinking this is some kind of router-line <->
    ~ > ~ modem-serial-port configuration mismatch.
    ~ >
    ~ > I'm skeptical, since NM-AM does not HAVE a serial port.
    ~ > The DTE link between the router and the modem blade is
    ~ > thru the PCI bus.
    ~ >
    ~ > ~ The reason I think this is that
    ~ > ~ the output of a show modem configuration 1/0 shows "SERIAL FLOW OFF
    ~ AT\Q0"
    ~ > ~ while router-line configuration has "flowcontrol hardware" configured.
    ~ Could
    ~ > ~ this impact performance?
    ~ >
    ~ > No.
    ~ >
    ~ > Aaron
    ~ >
    ~ > ---
    ~ >
    ~ > ~ "Aaron Leonard" <> wrote in message
    ~ > ~ news:...
    ~ > ~ > Everything you show below looks fine. Can you quantify
    ~ > ~ > what "terribly slow" means to you?
    ~ > ~ >
    ~ > ~ > The one call you show shows that the call trained at
    ~ > ~ > 31.2kbps transmit / 24kbps receive which is in the range
    ~ > ~ > of normalcy for V.34. It does show one retrain during
    ~ > ~ > the (short) call. If you stay connected longer (like, for
    ~ > ~ > minutes or hours), do you continue to retrain repetitively?
    ~ > ~ > What does the modem log show for a call that stays connected
    ~ > ~ > for a long time and moves much data?
    ~ > ~ >
    ~ > ~ > Aaron
    ~ > ~ >
    ~ > ~ > ---
    ~ > ~ >
    ~ > ~ > ~ Hi,
    ~ > ~ > ~
    ~ > ~ > ~ We've setup a C2621 (not the XM, the older) with a NM-8AM module to
    ~ > ~ allow
    ~ > ~ > ~ for analog dial-in for our mechanics. Setup went smooth but
    ~ > ~ communications
    ~ > ~ > ~ didn't. The dial-in succeeds but the connection is terribly slow.
    ~ Any
    ~ > ~ tips
    ~ > ~ > ~ on what I can do to pinpoint the problem?
    ~ > ~ > ~
    ~ > ~ > ~ Could this have anything to do with mismatched
    ~ (AT-commands\registers)
    ~ > ~ and
    ~ > ~ > ~ line setup? I noticed a "Serial flow OFF AT\Q0" and a "line-
    ~ flowcontrol
    ~ > ~ > ~ hardware" do these match? All modem settings are factory-defaults.
    ~ > ~ > ~
    ~ > ~ > ~ Please advise,
    ~ > ~ > ~
    ~ > ~ > ~ Erik
    ~ > ~ > ~
    ~ > ~ > ~ Here is our related config / show ... output:
    ~ > ~ > ~
    ~ > ~ > ~ -- Relevant async configuration sections
    ~ > ~ > ~
    ~ > ~ > ~ interface Loopback0
    ~ > ~ > ~ ip address 10.240.222.113 255.255.255.240
    ~ > ~ > ~ no ip directed-broadcast
    ~ > ~ > ~ !
    ~ > ~ > ~ ip local pool DIALIN 10.240.222.114 10.240.222.124
    ~ > ~ > ~ !
    ~ > ~ > ~ interface Group-Async1
    ~ > ~ > ~ ip unnumbered Loopback0
    ~ > ~ > ~ no ip directed-broadcast
    ~ > ~ > ~ encapsulation ppp
    ~ > ~ > ~ ip tcp header-compression passive
    ~ > ~ > ~ dialer in-band
    ~ > ~ > ~ dialer idle-timeout 600
    ~ > ~ > ~ dialer-group 1
    ~ > ~ > ~ async mode dedicated
    ~ > ~ > ~ peer default ip address pool DIALIN
    ~ > ~ > ~ no cdp enable
    ~ > ~ > ~ ppp callback accept
    ~ > ~ > ~ ppp authentication ms-chap chap
    ~ > ~ > ~ group-range 33 36
    ~ > ~ > ~ !
    ~ > ~ > ~
    ~ > ~ > ~ line 33 36
    ~ > ~ > ~ autoselect ppp
    ~ > ~ > ~ modem InOut
    ~ > ~ > ~ modem autoconfigure type mica
    ~ > ~ > ~ rotary 1
    ~ > ~ > ~ transport input all
    ~ > ~ > ~ escape-character NONE
    ~ > ~ > ~ flowcontrol hardware
    ~ > ~ > ~ !
    ~ > ~ > ~
    ~ > ~ > ~ -- Show version
    ~ > ~ > ~
    ~ > ~ > ~ Cisco Internetwork Operating System Software
    ~ > ~ > ~ IOS (tm) C2600 Software (C2600-D-M), Version 12.0(7)T, RELEASE
    ~ SOFTWARE
    ~ > ~ > ~ (fc2)
    ~ > ~ > ~ Copyright (c) 1986-1999 by cisco Systems, Inc.
    ~ > ~ > ~ Compiled Tue 07-Dec-99 01:20 by phanguye
    ~ > ~ > ~ Image text-base: 0x80008088, data-base: 0x808D24CC
    ~ > ~ > ~
    ~ > ~ > ~ ROM: System Bootstrap, Version 11.3(2)XA4, RELEASE SOFTWARE (fc1)
    ~ > ~ > ~
    ~ > ~ > ~ StarrenVegDRTR2 uptime is 3 days, 23 hours, 57 minutes
    ~ > ~ > ~ System returned to ROM by reload at 18:05:47 UTC Tue Feb 27 2001
    ~ > ~ > ~ System image file is "flash:c2600-d-mz.120-7.T.bin"
    ~ > ~ > ~
    ~ > ~ > ~ cisco 2621 (MPC860) processor (revision 0x102) with 26624K/6144K
    ~ bytes
    ~ > ~ of
    ~ > ~ > ~ memory
    ~ > ~ > ~ .
    ~ > ~ > ~ Processor board ID JAD045005XI (3965570801)
    ~ > ~ > ~ M860 processor: part number 0, mask 49
    ~ > ~ > ~ Bridging software.
    ~ > ~ > ~ X.25 software, Version 3.0.0.
    ~ > ~ > ~ Basic Rate ISDN software, Version 1.1.
    ~ > ~ > ~ 2 FastEthernet/IEEE 802.3 interface(s)
    ~ > ~ > ~ 1 Serial network interface(s)
    ~ > ~ > ~ 1 ISDN Basic Rate interface(s)
    ~ > ~ > ~ 8 terminal line(s) ! (This is the NM-8AM module)
    ~ > ~ > ~ 32K bytes of non-volatile configuration memory.
    ~ > ~ > ~ 8192K bytes of processor board System flash (Read/Write)
    ~ > ~ > ~
    ~ > ~ > ~ Configuration register is 0x2102
    ~ > ~ > ~
    ~ > ~ > ~ -- Show modem
    ~ > ~ > ~
    ~ > ~ > ~ Avg Hold Inc calls Out calls Busied Failed
    ~ No
    ~ > ~ > ~ Succ
    ~ > ~ > ~ Mdm Time Succ Fail Succ Fail Out Dial
    ~ Answer
    ~ > ~ > ~ Pct.
    ~ > ~ > ~ 1/0 00:04:03 7 0 0 0 0 0
    ~ 0
    ~ > ~ > ~ 100%
    ~ > ~ > ~ 1/1 00:08:37 7 1 0 0 0 0
    ~ 0
    ~ > ~ > ~ 88%
    ~ > ~ > ~ 1/2 00:07:25 7 0 0 0 0 0
    ~ 0
    ~ > ~ > ~ 100%
    ~ > ~ > ~ 1/3 00:06:04 8 0 0 0 0 0
    ~ 0
    ~ > ~ > ~ 100%
    ~ > ~ > ~ ...
    ~ > ~ > ~ -- Show modem configuration 1/0 (all others show the same output)
    ~ > ~ > ~
    ~ > ~ > ~ IDLE 000:01:48
    ~ > ~ > ~ LAST DIAL
    ~ > ~ > ~ MODEM HW: PC 2W United States
    ~ > ~ > ~ - RTS 5 CTS 6 DSR - CD 20 DTR - RI
    ~ > ~ > ~ MODULATION IDLE
    ~ > ~ > ~ MODEM BPS 33600 AT%G0
    ~ > ~ > ~ MODEM FLOW OFF AT\G0
    ~ > ~ > ~ MODEM MODE AUT AT\N3
    ~ > ~ > ~ BASE MODE V34 AT%M2
    ~ > ~ > ~ V.23 OPR. OFF AT%F0
    ~ > ~ > ~ AUTO ANS. ON ATS0=1
    ~ > ~ > ~ SERIAL BPS 38400 AT
    ~ > ~ > ~ BPS ADJUST OFF AT\J0
    ~ > ~ > ~ SPT BPS ADJ. 0 AT\W0
    ~ > ~ > ~ ANSWER MESSGS OFF ATQ2
    ~ > ~ > ~ SERIAL FLOW OFF AT\Q0
    ~ > ~ > ~ PASS XON/XOFF OFF AT\X0
    ~ > ~ > ~ PARITY 8N AT
    ~ > ~ > ~ BREAK 5 AT\K5
    ~ > ~ > ~ EXIT CHAR 043 ATS2=43
    ~ > ~ > ~ ANS DUMB MODE OFF AT#E0
    ~ > ~ > ~ CMD ECHO ON ATE1
    ~ > ~ > ~ RESULTS ON ATQ0
    ~ > ~ > ~ RESULT TYPE MNPX ATV1\V2
    ~ > ~ > ~ CONNECT MSG MDM ATW2
    ~ > ~ > ~ CONN MNP- 0 AT-M0
    ~ > ~ > ~ SPEED MATCH 1 AT%L1
    ~ > ~ > ~ EQUALIZER 1 AT:E1
    ~ > ~ > ~ FALLBACK 2 AT-Q2
    ~ > ~ > ~ DATA ECHO OFF AT\E0
    ~ > ~ > ~ INACT TIMER 00 AT\T0
    ~ > ~ > ~ AUTO RETRAIN ON AT%E1
    ~ > ~ > ~ COMPRESSION ALL AT%C3
    ~ > ~ > ~ MAX BLK SIZE 256 AT\A3
    ~ > ~ > ~ AUTO BUFF 0 AT\C0
    ~ > ~ > ~ AUTO CHAR 000 AT%A0
    ~ > ~ > ~ PAUSE TIME 002 ATS8=2
    ~ > ~ > ~ DTR 2 AT&D2
    ~ > ~ > ~ CARR DET 1 AT&C1
    ~ > ~ > ~ DSR 0 AT\D0
    ~ > ~ > ~ RING IND 1 AT\R1
    ~ > ~ > ~ LEASE LINE 0 AT&L0
    ~ > ~ > ~ LNG SPC DISC OFF ATY0
    ~ > ~ > ~ BUSIED OUT IDLE AT*Y0
    ~ > ~ > ~ DISC DELAY 000 AT%D0
    ~ > ~ > ~ RDLB ENABLE OFF AT&T5
    ~ > ~ > ~ DIAL MODE 4 ATX4
    ~ > ~ > ~ PULSE DIAL 60% AT&P0
    ~ > ~ > ~ PULSE MODE N AT%W0
    ~ > ~ > ~ V23 HD EQU ON AT%O1
    ~ > ~ > ~ GUARD TONE 0 AT&G0
    ~ > ~ > ~ DATA CALL TONE OFF AT-C0
    ~ > ~ > ~ 2ND FC OFF AT-F0
    ~ > ~ > ~ NM BIT VALUE 0 AT-E0
    ~ > ~ > ~ PAR CHK 0 AT-P0
    ~ > ~ > ~ MANUAL DIAL 0 AT:D0
    ~ > ~ > ~ UPSHIFT BPS OFF AT*H0
    ~ > ~ > ~ CELLULAR OFF AT)M0
    ~ > ~ > ~ LINETYPE 000 AT@M0
    ~ > ~ > ~ DETECT PHASE ON AT-J1
    ~ > ~ > ~ MNP EXT SVC 2 AT-K2
    ~ > ~ > ~ UNIV V.23 1 AT-V1
    ~ > ~ > ~ CONNECT MSG 1ST AT@C0
    ~ > ~ > ~ DUMB MODE OFF AT-H0
    ~ > ~ > ~ BELL ON ATB1
    ~ > ~ > ~ CALL ABT DISAB OFF AT-Y0
    ~ > ~ > ~ REVERSE ANS OFF AT-W0
    ~ > ~ > ~ MIN CONN SPD 300 AT@U
    ~ > ~ > ~ MU-LAW/A_LAW MU-L AT"A0
    ~ > ~ > ~ REM CHAR 042 AT*S42
    ~ > ~ > ~
    ~ > ~ > ~ -- SHow modem version
    ~ > ~ > ~
    ~ > ~ > ~ Slot 1:MCOM Analog Integrated Modem Firmware Version 1.2.0
    ~ > ~ > ~ Source: IOS
    ~ > ~ > ~ Boot firmware: 1.1.5
    ~ > ~ > ~ MIMIC firmware: 1.3.3
    ~ > ~ > ~ Modem firmware: 2.3.8
    ~ > ~ > ~ DSP firmware: 0.0.2
    ~ > ~ > ~
    ~ > ~ > ~ -- Show modem operational-status
    ~ > ~ > ~
    ~ > ~ > ~ MNP Class 10 V.34 Modem
    ~ > ~ > ~ MODEM HW: PC 2W United States
    ~ > ~ > ~ Firmware Rev 2.3.9/85
    ~ > ~ > ~ DSP C36 Part/Rev 3635 4241
    ~ > ~ > ~ DSP C58 Part/Rev 3635 2041
    ~ > ~ > ~ DSP Controller Rev 0.0
    ~ > ~ > ~ DSP Data Pump Rev 0.0
    ~ > ~ > ~ Connect Time 000:01:48
    ~ > ~ > ~ - RTS 5 CTS 6 DSR - CD 20 DTR - RI
    ~ > ~ > ~ Disconnect Remote - Local - 14,9
    ~ > ~ > ~
    ~ > ~ > ~ Mod Type IDLE
    ~ > ~ > ~ TX/RX Spd ***** ***** BPS
    ~ > ~ > ~ TX/RX Spd Mask NA BFFF Hex
    ~ > ~ > ~ Symbol Rate 2400 Hz
    ~ > ~ > ~ TX/RX Carrier Freq 1600 1600 Hz
    ~ > ~ > ~ TX/RX States 16 16
    ~ > ~ > ~ TX/RX NLE OFF OFF
    ~ > ~ > ~ TX/RX Precoding OFF OFF
    ~ > ~ > ~ TX/RX Shaping OFF OFF
    ~ > ~ > ~ TX Preemphasis Index 0
    ~ > ~ > ~ TX Lvl REG - 13 dBm
    ~ > ~ > ~ TX Lvl RAM - 0 dB
    ~ > ~ > ~ TX Lvl Reduct 0 dB
    ~ > ~ > ~ TX Lvl - 13 dBm
    ~ > ~ > ~ RX Lvl - 33 dBm
    ~ > ~ > ~ S/NR 0
    ~ > ~ > ~ S/DR 0
    ~ > ~ > ~ EQM 0000 Hex
    ~ > ~ > ~ AVG EQM 0000 Hex
    ~ > ~ > ~ Lower/Upper Edge 0 0 Hz
    ~ > ~ > ~ Phase Jitter Freq 0 Hz
    ~ > ~ > ~ Phase Jitter Amp 0.0 deg
    ~ > ~ > ~ Far Echo Lvl 0 N
    ~ > ~ > ~ Round Trip Delay 0 msec
    ~ > ~ > ~ Dropouts > 5dB 0
    ~ > ~ > ~ RTRNs Init/Accept 0 0
    ~ > ~ > ~ RRENs Init/Accept 0 0
    ~ > ~ > ~ BLER 0000 Hex
    ~ > ~ > ~ RBS Counter 0000 Hex
    ~ > ~ > ~ Digital Pad Detected NA
    ~ > ~ > ~ Max SECRXB 85
    ~ > ~ > ~ Max SECTXB 87
    ~ > ~ > ~
    ~ > ~ > ~ -- show modem connect-speeds 36600
    ~ > ~ > ~
    ~ > ~ > ~ connect speeds
    ~ > ~ > ~
    ~ > ~ > ~ Mdm 26400 28000 28800 29333 30667 31200 32000 33333
    ~ 33600
    ~ > ~ TotCnt
    ~ > ~ > ~ 1/0 0 0 0 0 0 1 0 0
    ~ 6
    ~ > ~ 7
    ~ > ~ > ~ 1/1 2 0 0 0 0 1 0 0
    ~ 4
    ~ > ~ 7
    ~ > ~ > ~ 1/2 1 0 0 0 0 1 0 0
    ~ 5
    ~ > ~ 7
    ~ > ~ > ~ 1/3 1 0 0 0 0 1 0 0
    ~ 6
    ~ > ~ 8
    ~ > ~ > ~
    ~ > ~ > ~ -- show modem log
    ~ > ~ > ~
    ~ > ~ > ~ Modem 1/0 Events Log:
    ~ > ~ > ~ 2d23h DTR set low
    ~ > ~ > ~ 2d23h Modem disabled
    ~ > ~ > ~ 2d23h PPP escape maps set: TX map=00000000 RX map=FFFFFFFF
    ~ > ~ > ~ 2d23h DTR set high
    ~ > ~ > ~ 2d23h Modem enabled
    ~ > ~ > ~ 2d23h Modem disabled
    ~ > ~ > ~ 2d19h Modem State: Dialing/Answering
    ~ > ~ > ~ 2d19h CSM: event-MODEM_STARTING_CONNECT New
    ~ > ~ > ~ State-CSM_CONNECT_INITIATED_STATE
    ~ > ~ > ~ 2d19h Modem State: Incoming ring
    ~ > ~ > ~ 2d19h CSM: event-MODEM_ANALOG_CALL_IN New
    ~ > ~ State-CSM_CONNECT_INITIATED_STATE
    ~ > ~ > ~ 2d19h Hook state: Off hook
    ~ > ~ > ~ 2d19h Modem State: Waiting for Carrier
    ~ > ~ > ~ 2d19h Modem State: Connected
    ~ > ~ > ~ 2d19h Connection: TX/RX Speed = 31200/24000, Modulation = V34
    ~ > ~ > ~ Direction = Answer, Protocol = LAPM, Compression =
    ~ V42bis
    ~ > ~ > ~ 2d19h CSM: event-MODEM_CONNECTED New State-CONNECTED_STATE
    ~ > ~ > ~ 2d19h PPP mode active
    ~ > ~ > ~ 2d19h Modem enabled
    ~ > ~ > ~ 2d19h PPP escape maps set: TX map=00000000 RX map=FFFFFFFF
    ~ > ~ > ~ 2d19h PPP escape maps set: TX map=00000000 RX map=00000000
    ~ > ~ > ~ 2d19h Modem Analog Report: TX = -13, RX = -37, Signal to noise = 33
    ~ > ~ > ~ 2d19h Modem State: Retrain Accepted
    ~ > ~ > ~ 2d19h Connection update: TX/RX Speed = 28800/26400, Modulation = V34
    ~ > ~ > ~ 2d19h Modem State: Connected
    ~ > ~ > ~ 2d19h Modem State: Disconnecting
    ~ > ~ > ~ 2d19h CSM: event-MODEM_DISCONNECTED New State-IDLE_STATE
    ~ > ~ > ~ 2d19h End connection: Retransmits for MNP block (TX/RX) = 0/0
    ~ > ~ > ~ Duration = 0:00:32, Number of TX/RX char = 5039/2887
    ~ > ~ > ~ Local Disc Reason = Remote Link Disc
    ~ > ~ > ~ Remote Disc Reason = Unknown
    ~ > ~ > ~ 2d19h Hook state: On hook
    ~ > ~ > ~ 2d19h Modem State: Idle
    ~ > ~ > ~ 2d19h DTR set low
    ~ > ~ > ~ 2d19h DTR set low
    ~ > ~ > ~ 2d19h Modem disabled
    ~ > ~ > ~ 2d19h Character mode active
    ~ > ~ > ~ 2d19h DTR set high
    ~ > ~ > ~ 2d19h Modem enabled
    ~ > ~ > ~ 2d19h Modem disabled
    ~ > ~ > ~ 2d04h Modem State: Dialing/Answering
    ~ > ~ > ~ 2d04h CSM: event-MODEM_STARTING_CONNECT New
    ~ > ~ > ~ State-CSM_CONNECT_INITIATED_STATE
    ~ > ~ > ~ 2d04h Modem State: Incoming ring
    ~ > ~ > ~ 2d04h CSM: event-MODEM_ANALOG_CALL_IN New
    ~ > ~ State-CSM_CONNECT_INITIATED_STATE
    ~ > ~ > ~
    ~ > ~ > ~
    ~ > ~ > ~
    ~ > ~ > ~
    ~ > ~ > ~
    ~ > ~ >
    ~ > ~
    ~ >
    ~
    Aaron Leonard, Apr 16, 2004
    #8
  9. Hi Aaron,

    Thanks again for your support. I was able to pinpoint and solve the problem!
    The problem was PPP compression. Somehow the router and client pc did not
    negotiate the correct compression algorithm. My guess is the router used
    stac compression while the windows side used mppc. I added the "compress
    mppc" command to the group-async1 itnerface and that solved the problem. I
    still find it hard to believe any data crossed the connection with such a
    protocol-mismatch, but it did .... slowly.

    Since Windows 2000 and later do not seem to support stac compression
    anymore, wich is the cisco default, it might be a good idea to add a note
    about this to the configuration examples available on cisco.com.
    I haven't tried newer IOS'es yet, but if this problem also occurs on later
    IOS'es the note might be a good idear.

    Again, thanks.

    Erik Tamminga

    "Aaron Leonard" <> wrote in message
    news:...
    > Hi Eric,
    >
    > ~ Thanks again for replying. Here is another output of show modem log. It
    > ~ displays two (sorry) short calls. Nothing specials, as far as I can see.
    >
    > I agree, these logs indicate that things are fine at the modem
    > (modulation/EC) layer.
    >
    > ~ Your previous reply got me thinking about the different layers ("Look at

    a
    > ~ call like this at the TCP, PPP, EC and modulation layers and see where

    the
    > ~ problem is). I changed "async mode dedicated" into "async mode

    interactive"
    > ~ to cut off the top two layers. This allowed me to dial into the router

    using
    > ~ Hyperterminal instead of the windows dial-up (PPP) adapter. The

    resulting
    > ~ connection was fine.
    >
    > Good test. That's the one I always do to prove that the router
    > line and the modem link below it are fine.
    >
    > I was able to issue several commands without having to
    > ~ wait for any characters to be echoed back. With this result I think the

    "EC
    > ~ and modulation" layers are fine and I will have to troubleshoot TCP and

    PPP
    > ~ further.
    >
    > Yep. Actually there are three layers there, TCP/IP/PPP.
    >
    > ~ Could you point me into the right direction for troubleshooting TCP/PPP?

    If
    > ~ the modem connection is stable, how could an extra layer PPP/TCP make a
    > ~ connection to the same router (telnet) over the same physical layer

    fail.
    > ~ Any known compatibility issues regarding IOS 12.0(7)T and Windows

    2000/XP?
    >
    > Well, it's odd that you should have fine performance on the async line
    > but not using TCP/IP/PPP ... but not unheard of!
    >
    > My next test would be to bring up the PPP link to the router. While
    > telnetted into the router from the LAN side, turn on "debug ppp packet",
    > "debug dialer packet" and "debug ip packet" to an access list that
    > matches packets only to/from the client IP address.
    >
    > debugging advice in general: use
    >
    > conf term
    > no logging console
    > no logging rate-limit
    > service timestamp debug date msec
    > logging buffered 50000 debug
    >
    > Then show log after the event to see what happened ... this is the best
    > way to avoid losing any debugging info.
    >
    > Do a ping from the router to the client (or vice versa). Are you losing
    > any? Are the RTTs in the range you would expect (80-250 msec)? If there
    > are problems, do a "show interface async<n>" and do a "modem at s/p" then
    > AT@E1 while the call is connected.
    >
    > I can't think offhand why you should have any particular problem with
    > 12.0(7)T, but on general principle you might try upgrading to most recent
    > 12.1 mainline, as it is basically 12.0(7)T with many generations of
    > bugfixes applied.
    >
    >
    > Aaron
    >
    > ---
    >
    > ~ Regards,
    > ~
    > ~ Erik Tamminga (ccdp)
    > ~
    > ~ StarrenVegDRTR2#sh modem log
    > ~
    > ~ Modem 1/0 Events Log:
    > ~ 00:13:34.836 DC session request: AT\S1
    > ~ 00:08:04.592 Modem State: Dialing/Answering
    > ~ 00:08:04.592 CSM: event-MODEM_STARTING_CONNECT New
    > ~ State-CSM_CONNECT_INITIATED_S
    > ~ TATE
    > ~ 00:08:04.588 Modem State: Incoming ring
    > ~ 00:08:04.588 CSM: event-MODEM_ANALOG_CALL_IN New
    > ~ State-CSM_CONNECT_INITIATED_STA
    > ~ TE
    > ~ 00:08:03.776 Hook state: Off hook
    > ~ 00:08:03.164 Modem State: Waiting for Carrier
    > ~ 00:07:52.800 Modem State: Connected
    > ~ 00:07:51.664 Connection: TX/RX Speed = 28800/28800, Modulation = V34
    > ~ Direction = Answer, Protocol = LAPM, Compression = V42bis
    > ~ 00:07:51.668 CSM: event-MODEM_CONNECTED New State-CONNECTED_STATE
    > ~ 00:07:51.640 Modem enabled
    > ~ 00:07:13.116 PPP mode active
    > ~ 00:07:11.116 PPP escape maps set: TX map=00000000 RX map=FFFFFFFF
    > ~ 00:07:09.116 PPP escape maps set: TX map=00000000 RX map=FFFFFFFF
    > ~ 00:06:56.824 Modem Analog Report: TX = -16, RX = -31, Signal to noise =

    45
    > ~ 00:06:56.828 Modem State: Disconnecting
    > ~ 00:06:56.828 CSM: event-MODEM_DISCONNECTED New State-IDLE_STATE
    > ~ 00:06:56.824 End connection: Retransmits for MNP block (TX/RX) = 0/0
    > ~ Duration = 0:00:56, Number of TX/RX char = 60/4211
    > ~ Local Disc Reason = Remote Link Disc
    > ~ Remote Disc Reason = Unknown
    > ~ 00:07:18.236 Hook state: On hook
    > ~ 00:07:17.584 DTR set low
    > ~ 00:07:17.728 DTR set low
    > ~ 00:07:17.892 Modem disabled
    > ~ 00:07:18.032 Modem State: Idle
    > ~ 00:07:13.260 Character mode active
    > ~ 00:07:13.416 DTR set high
    > ~ 00:07:13.544 Modem enabled
    > ~ 00:07:07.804 Modem disabled
    > ~
    > ~
    > ~ Modem 1/1 Events Log:
    > ~
    > ~
    > ~ Modem 1/2 Events Log:
    > ~
    > ~
    > ~ Modem 1/3 Events Log:
    > ~ 00:06:54.488 MSMP Reset
    > ~ 00:06:54.520 MSMP Reset
    > ~ 00:06:54.552 Modem State: Dialing/Answering
    > ~ 00:06:54.584 CSM: event-MODEM_STARTING_CONNECT New
    > ~ State-CSM_CONNECT_INITIATED_S
    > ~ TATE
    > ~ 00:06:54.616 Modem State: Incoming ring
    > ~ 00:06:56.276 CSM: event-MODEM_ANALOG_CALL_IN New
    > ~ State-CSM_CONNECT_INITIATED_STA
    > ~ TE
    > ~ 00:06:55.976 Hook state: Off hook
    > ~ 00:06:55.404 Modem State: Waiting for Carrier
    > ~ 00:06:45.280 Modem State: Connected
    > ~ 00:06:44.236 Connection: TX/RX Speed = 26400/26400, Modulation = V34
    > ~ Direction = Answer, Protocol = LAPM, Compression = V42bis
    > ~ 00:06:44.304 CSM: event-MODEM_CONNECTED New State-CONNECTED_STATE
    > ~ 00:06:43.984 Modem enabled
    > ~ 00:06:35.592 PPP mode active
    > ~ 00:06:35.624 PPP escape maps set: TX map=00000000 RX map=FFFFFFFF
    > ~ 00:06:35.656 PPP escape maps set: TX map=00000000 RX map=FFFFFFFF
    > ~ 00:06:33.556 PPP escape maps set: TX map=00000000 RX map=00000000
    > ~ 00:06:35.488 PPP escape maps set: TX map=00000000 RX map=FFFFFFFF
    > ~ 00:06:35.860 PPP escape maps set: TX map=00000000 RX map=00000000
    > ~ 00:01:12.420 Modem Analog Report: TX = -16, RX = -31, Signal to noise =

    54
    > ~ 00:01:12.456 Modem State: Disconnecting
    > ~ 00:01:12.484 CSM: event-MODEM_DISCONNECTED New State-IDLE_STATE
    > ~ 00:01:12.512 End connection: Retransmits for MNP block (TX/RX) = 0/0
    > ~ Duration = 0:05:37, Number of TX/RX char = 14548/10506
    > ~ Local Disc Reason = Remote Link Disc
    > ~ Remote Disc Reason = Unknown
    > ~ 00:01:12.144 Hook state: On hook
    > ~ 00:01:11.680 DTR set low
    > ~ 00:01:11.712 DTR set low
    > ~ 00:01:11.736 Modem disabled
    > ~ 00:01:11.416 Modem State: Idle
    > ~ 00:01:17.432 PPP escape maps set: TX map=00000000 RX map=FFFFFFFF
    > ~ 00:01:13.708 Character mode active
    > ~ 00:01:13.740 DTR set high
    > ~ 00:01:13.768 Modem enabled
    > ~ 00:01:07.936 Modem disabled
    > ~
    > ~ StarrenVegDRTR2#
    > ~
    > ~
    > ~ "Aaron Leonard" <> wrote in message
    > ~ news:...
    > ~ > On Thu, 15 Apr 2004 08:32:10 +0200, "Erik Tamminga"
    > ~ <> wrote:
    > ~ >
    > ~ > ~ Hi Aaron,
    > ~ > ~
    > ~ > ~ "Terribly slow" means you can't even work in a telnet session to the
    > ~ router
    > ~ > ~ dialed in to and websites (local to the router, few pictures) take

    ages
    > ~ to
    > ~ > ~ load. I know modem connections don't go much faster than 2-4kBps,

    but
    > ~ this
    > ~ > ~ doesn't match experienced throughput. All modems that connect

    connect at
    > ~ > ~ their expected speeds (28800, 33600, etc). Send/receive leds on the
    > ~ client
    > ~ > ~ modems don't indicate full line usage.
    > ~ > ~ I checked to make sure this is not an external problem like slow or
    > ~ failing
    > ~ > ~ dns or bad/instable routing tables. Bad "telnet performance" to the
    > ~ router
    > ~ > ~ dailed-in to confirms this.
    > ~ >
    > ~ > OK. Still, it would be good to collect the modem details for several
    > ~ > calls to see EXACTLY what they look like - to confirm that they are
    > ~ > fine at the modulation and error control layers.
    > ~ >
    > ~ > ~ For example:
    > ~ > ~ dial in to router A (connected at 33k6)
    > ~ >
    > ~ > In PPP?
    > ~ >
    > ~ > ~ telnet to router A (ip address loopback, or any other address of the
    > ~ router)
    > ~ > ~ login and do a "show start" takes ~10 seconds to fill the screen (so

    do
    > ~ > ~ additional pages).
    > ~ > ~ when typing commands (I can actually type them quite fast), I have

    to
    > ~ wait
    > ~ > ~ for the characters to get echod back for ages.
    > ~ >
    > ~ > Sounds to me that you must be getting TCP retransmits and/or errored
    > ~ > PPP packets and/or EC layer retransmits and/or modulation layer
    > ~ > speedshifts/retrains. Look at a call like this at the TCP, PPP,
    > ~ > EC and modulation layers and see where the problem is.
    > ~ >
    > ~ > ~ I can easily reproduce this behaviour because it happens ~100% of

    all
    > ~ > ~ connects. Some people indicated a change of their local modem
    > ~ > ~ errordetection/compression settings (windows 2000 dialup properties)
    > ~ > ~ resulted in some better performance, but I haven't been able to

    confirm
    > ~ > ~ this.
    > ~ > ~
    > ~ > ~ Currently I'm thinking this is some kind of router-line <->
    > ~ > ~ modem-serial-port configuration mismatch.
    > ~ >
    > ~ > I'm skeptical, since NM-AM does not HAVE a serial port.
    > ~ > The DTE link between the router and the modem blade is
    > ~ > thru the PCI bus.
    > ~ >
    > ~ > ~ The reason I think this is that
    > ~ > ~ the output of a show modem configuration 1/0 shows "SERIAL FLOW OFF
    > ~ AT\Q0"
    > ~ > ~ while router-line configuration has "flowcontrol hardware"

    configured.
    > ~ Could
    > ~ > ~ this impact performance?
    > ~ >
    > ~ > No.
    > ~ >
    > ~ > Aaron
    > ~ >
    > ~ > ---
    > ~ >
    > ~ > ~ "Aaron Leonard" <> wrote in message
    > ~ > ~ news:...
    > ~ > ~ > Everything you show below looks fine. Can you quantify
    > ~ > ~ > what "terribly slow" means to you?
    > ~ > ~ >
    > ~ > ~ > The one call you show shows that the call trained at
    > ~ > ~ > 31.2kbps transmit / 24kbps receive which is in the range
    > ~ > ~ > of normalcy for V.34. It does show one retrain during
    > ~ > ~ > the (short) call. If you stay connected longer (like, for
    > ~ > ~ > minutes or hours), do you continue to retrain repetitively?
    > ~ > ~ > What does the modem log show for a call that stays connected
    > ~ > ~ > for a long time and moves much data?
    > ~ > ~ >
    > ~ > ~ > Aaron
    > ~ > ~ >
    > ~ > ~ > ---
    > ~ > ~ >
    > ~ > ~ > ~ Hi,
    > ~ > ~ > ~
    > ~ > ~ > ~ We've setup a C2621 (not the XM, the older) with a NM-8AM module

    to
    > ~ > ~ allow
    > ~ > ~ > ~ for analog dial-in for our mechanics. Setup went smooth but
    > ~ > ~ communications
    > ~ > ~ > ~ didn't. The dial-in succeeds but the connection is terribly

    slow.
    > ~ Any
    > ~ > ~ tips
    > ~ > ~ > ~ on what I can do to pinpoint the problem?
    > ~ > ~ > ~
    > ~ > ~ > ~ Could this have anything to do with mismatched
    > ~ (AT-commands\registers)
    > ~ > ~ and
    > ~ > ~ > ~ line setup? I noticed a "Serial flow OFF AT\Q0" and a "line-
    > ~ flowcontrol
    > ~ > ~ > ~ hardware" do these match? All modem settings are

    factory-defaults.
    > ~ > ~ > ~
    > ~ > ~ > ~ Please advise,
    > ~ > ~ > ~
    > ~ > ~ > ~ Erik
    > ~ > ~ > ~
    > ~ > ~ > ~ Here is our related config / show ... output:
    > ~ > ~ > ~
    > ~ > ~ > ~ -- Relevant async configuration sections
    > ~ > ~ > ~
    > ~ > ~ > ~ interface Loopback0
    > ~ > ~ > ~ ip address 10.240.222.113 255.255.255.240
    > ~ > ~ > ~ no ip directed-broadcast
    > ~ > ~ > ~ !
    > ~ > ~ > ~ ip local pool DIALIN 10.240.222.114 10.240.222.124
    > ~ > ~ > ~ !
    > ~ > ~ > ~ interface Group-Async1
    > ~ > ~ > ~ ip unnumbered Loopback0
    > ~ > ~ > ~ no ip directed-broadcast
    > ~ > ~ > ~ encapsulation ppp
    > ~ > ~ > ~ ip tcp header-compression passive
    > ~ > ~ > ~ dialer in-band
    > ~ > ~ > ~ dialer idle-timeout 600
    > ~ > ~ > ~ dialer-group 1
    > ~ > ~ > ~ async mode dedicated
    > ~ > ~ > ~ peer default ip address pool DIALIN
    > ~ > ~ > ~ no cdp enable
    > ~ > ~ > ~ ppp callback accept
    > ~ > ~ > ~ ppp authentication ms-chap chap
    > ~ > ~ > ~ group-range 33 36
    > ~ > ~ > ~ !
    > ~ > ~ > ~
    > ~ > ~ > ~ line 33 36
    > ~ > ~ > ~ autoselect ppp
    > ~ > ~ > ~ modem InOut
    > ~ > ~ > ~ modem autoconfigure type mica
    > ~ > ~ > ~ rotary 1
    > ~ > ~ > ~ transport input all
    > ~ > ~ > ~ escape-character NONE
    > ~ > ~ > ~ flowcontrol hardware
    > ~ > ~ > ~ !
    > ~ > ~ > ~
    > ~ > ~ > ~ -- Show version
    > ~ > ~ > ~
    > ~ > ~ > ~ Cisco Internetwork Operating System Software
    > ~ > ~ > ~ IOS (tm) C2600 Software (C2600-D-M), Version 12.0(7)T, RELEASE
    > ~ SOFTWARE
    > ~ > ~ > ~ (fc2)
    > ~ > ~ > ~ Copyright (c) 1986-1999 by cisco Systems, Inc.
    > ~ > ~ > ~ Compiled Tue 07-Dec-99 01:20 by phanguye
    > ~ > ~ > ~ Image text-base: 0x80008088, data-base: 0x808D24CC
    > ~ > ~ > ~
    > ~ > ~ > ~ ROM: System Bootstrap, Version 11.3(2)XA4, RELEASE SOFTWARE

    (fc1)
    > ~ > ~ > ~
    > ~ > ~ > ~ StarrenVegDRTR2 uptime is 3 days, 23 hours, 57 minutes
    > ~ > ~ > ~ System returned to ROM by reload at 18:05:47 UTC Tue Feb 27 2001
    > ~ > ~ > ~ System image file is "flash:c2600-d-mz.120-7.T.bin"
    > ~ > ~ > ~
    > ~ > ~ > ~ cisco 2621 (MPC860) processor (revision 0x102) with 26624K/6144K
    > ~ bytes
    > ~ > ~ of
    > ~ > ~ > ~ memory
    > ~ > ~ > ~ .
    > ~ > ~ > ~ Processor board ID JAD045005XI (3965570801)
    > ~ > ~ > ~ M860 processor: part number 0, mask 49
    > ~ > ~ > ~ Bridging software.
    > ~ > ~ > ~ X.25 software, Version 3.0.0.
    > ~ > ~ > ~ Basic Rate ISDN software, Version 1.1.
    > ~ > ~ > ~ 2 FastEthernet/IEEE 802.3 interface(s)
    > ~ > ~ > ~ 1 Serial network interface(s)
    > ~ > ~ > ~ 1 ISDN Basic Rate interface(s)
    > ~ > ~ > ~ 8 terminal line(s) ! (This is the NM-8AM module)
    > ~ > ~ > ~ 32K bytes of non-volatile configuration memory.
    > ~ > ~ > ~ 8192K bytes of processor board System flash (Read/Write)
    > ~ > ~ > ~
    > ~ > ~ > ~ Configuration register is 0x2102
    > ~ > ~ > ~
    > ~ > ~ > ~ -- Show modem
    > ~ > ~ > ~
    > ~ > ~ > ~ Avg Hold Inc calls Out calls Busied Failed
    > ~ No
    > ~ > ~ > ~ Succ
    > ~ > ~ > ~ Mdm Time Succ Fail Succ Fail Out Dial
    > ~ Answer
    > ~ > ~ > ~ Pct.
    > ~ > ~ > ~ 1/0 00:04:03 7 0 0 0 0 0
    > ~ 0
    > ~ > ~ > ~ 100%
    > ~ > ~ > ~ 1/1 00:08:37 7 1 0 0 0 0
    > ~ 0
    > ~ > ~ > ~ 88%
    > ~ > ~ > ~ 1/2 00:07:25 7 0 0 0 0 0
    > ~ 0
    > ~ > ~ > ~ 100%
    > ~ > ~ > ~ 1/3 00:06:04 8 0 0 0 0 0
    > ~ 0
    > ~ > ~ > ~ 100%
    > ~ > ~ > ~ ...
    > ~ > ~ > ~ -- Show modem configuration 1/0 (all others show the same

    output)
    > ~ > ~ > ~
    > ~ > ~ > ~ IDLE 000:01:48
    > ~ > ~ > ~ LAST DIAL
    > ~ > ~ > ~ MODEM HW: PC 2W United States
    > ~ > ~ > ~ - RTS 5 CTS 6 DSR - CD 20 DTR - RI
    > ~ > ~ > ~ MODULATION IDLE
    > ~ > ~ > ~ MODEM BPS 33600 AT%G0
    > ~ > ~ > ~ MODEM FLOW OFF AT\G0
    > ~ > ~ > ~ MODEM MODE AUT AT\N3
    > ~ > ~ > ~ BASE MODE V34 AT%M2
    > ~ > ~ > ~ V.23 OPR. OFF AT%F0
    > ~ > ~ > ~ AUTO ANS. ON ATS0=1
    > ~ > ~ > ~ SERIAL BPS 38400 AT
    > ~ > ~ > ~ BPS ADJUST OFF AT\J0
    > ~ > ~ > ~ SPT BPS ADJ. 0 AT\W0
    > ~ > ~ > ~ ANSWER MESSGS OFF ATQ2
    > ~ > ~ > ~ SERIAL FLOW OFF AT\Q0
    > ~ > ~ > ~ PASS XON/XOFF OFF AT\X0
    > ~ > ~ > ~ PARITY 8N AT
    > ~ > ~ > ~ BREAK 5 AT\K5
    > ~ > ~ > ~ EXIT CHAR 043 ATS2=43
    > ~ > ~ > ~ ANS DUMB MODE OFF AT#E0
    > ~ > ~ > ~ CMD ECHO ON ATE1
    > ~ > ~ > ~ RESULTS ON ATQ0
    > ~ > ~ > ~ RESULT TYPE MNPX ATV1\V2
    > ~ > ~ > ~ CONNECT MSG MDM ATW2
    > ~ > ~ > ~ CONN MNP- 0 AT-M0
    > ~ > ~ > ~ SPEED MATCH 1 AT%L1
    > ~ > ~ > ~ EQUALIZER 1 AT:E1
    > ~ > ~ > ~ FALLBACK 2 AT-Q2
    > ~ > ~ > ~ DATA ECHO OFF AT\E0
    > ~ > ~ > ~ INACT TIMER 00 AT\T0
    > ~ > ~ > ~ AUTO RETRAIN ON AT%E1
    > ~ > ~ > ~ COMPRESSION ALL AT%C3
    > ~ > ~ > ~ MAX BLK SIZE 256 AT\A3
    > ~ > ~ > ~ AUTO BUFF 0 AT\C0
    > ~ > ~ > ~ AUTO CHAR 000 AT%A0
    > ~ > ~ > ~ PAUSE TIME 002 ATS8=2
    > ~ > ~ > ~ DTR 2 AT&D2
    > ~ > ~ > ~ CARR DET 1 AT&C1
    > ~ > ~ > ~ DSR 0 AT\D0
    > ~ > ~ > ~ RING IND 1 AT\R1
    > ~ > ~ > ~ LEASE LINE 0 AT&L0
    > ~ > ~ > ~ LNG SPC DISC OFF ATY0
    > ~ > ~ > ~ BUSIED OUT IDLE AT*Y0
    > ~ > ~ > ~ DISC DELAY 000 AT%D0
    > ~ > ~ > ~ RDLB ENABLE OFF AT&T5
    > ~ > ~ > ~ DIAL MODE 4 ATX4
    > ~ > ~ > ~ PULSE DIAL 60% AT&P0
    > ~ > ~ > ~ PULSE MODE N AT%W0
    > ~ > ~ > ~ V23 HD EQU ON AT%O1
    > ~ > ~ > ~ GUARD TONE 0 AT&G0
    > ~ > ~ > ~ DATA CALL TONE OFF AT-C0
    > ~ > ~ > ~ 2ND FC OFF AT-F0
    > ~ > ~ > ~ NM BIT VALUE 0 AT-E0
    > ~ > ~ > ~ PAR CHK 0 AT-P0
    > ~ > ~ > ~ MANUAL DIAL 0 AT:D0
    > ~ > ~ > ~ UPSHIFT BPS OFF AT*H0
    > ~ > ~ > ~ CELLULAR OFF AT)M0
    > ~ > ~ > ~ LINETYPE 000 AT@M0
    > ~ > ~ > ~ DETECT PHASE ON AT-J1
    > ~ > ~ > ~ MNP EXT SVC 2 AT-K2
    > ~ > ~ > ~ UNIV V.23 1 AT-V1
    > ~ > ~ > ~ CONNECT MSG 1ST AT@C0
    > ~ > ~ > ~ DUMB MODE OFF AT-H0
    > ~ > ~ > ~ BELL ON ATB1
    > ~ > ~ > ~ CALL ABT DISAB OFF AT-Y0
    > ~ > ~ > ~ REVERSE ANS OFF AT-W0
    > ~ > ~ > ~ MIN CONN SPD 300 AT@U
    > ~ > ~ > ~ MU-LAW/A_LAW MU-L AT"A0
    > ~ > ~ > ~ REM CHAR 042 AT*S42
    > ~ > ~ > ~
    > ~ > ~ > ~ -- SHow modem version
    > ~ > ~ > ~
    > ~ > ~ > ~ Slot 1:MCOM Analog Integrated Modem Firmware Version 1.2.0
    > ~ > ~ > ~ Source: IOS
    > ~ > ~ > ~ Boot firmware: 1.1.5
    > ~ > ~ > ~ MIMIC firmware: 1.3.3
    > ~ > ~ > ~ Modem firmware: 2.3.8
    > ~ > ~ > ~ DSP firmware: 0.0.2
    > ~ > ~ > ~
    > ~ > ~ > ~ -- Show modem operational-status
    > ~ > ~ > ~
    > ~ > ~ > ~ MNP Class 10 V.34 Modem
    > ~ > ~ > ~ MODEM HW: PC 2W United States
    > ~ > ~ > ~ Firmware Rev 2.3.9/85
    > ~ > ~ > ~ DSP C36 Part/Rev 3635 4241
    > ~ > ~ > ~ DSP C58 Part/Rev 3635 2041
    > ~ > ~ > ~ DSP Controller Rev 0.0
    > ~ > ~ > ~ DSP Data Pump Rev 0.0
    > ~ > ~ > ~ Connect Time 000:01:48
    > ~ > ~ > ~ - RTS 5 CTS 6 DSR - CD 20 DTR - RI
    > ~ > ~ > ~ Disconnect Remote - Local - 14,9
    > ~ > ~ > ~
    > ~ > ~ > ~ Mod Type IDLE
    > ~ > ~ > ~ TX/RX Spd ***** ***** BPS
    > ~ > ~ > ~ TX/RX Spd Mask NA BFFF Hex
    > ~ > ~ > ~ Symbol Rate 2400 Hz
    > ~ > ~ > ~ TX/RX Carrier Freq 1600 1600 Hz
    > ~ > ~ > ~ TX/RX States 16 16
    > ~ > ~ > ~ TX/RX NLE OFF OFF
    > ~ > ~ > ~ TX/RX Precoding OFF OFF
    > ~ > ~ > ~ TX/RX Shaping OFF OFF
    > ~ > ~ > ~ TX Preemphasis Index 0
    > ~ > ~ > ~ TX Lvl REG - 13 dBm
    > ~ > ~ > ~ TX Lvl RAM - 0 dB
    > ~ > ~ > ~ TX Lvl Reduct 0 dB
    > ~ > ~ > ~ TX Lvl - 13 dBm
    > ~ > ~ > ~ RX Lvl - 33 dBm
    > ~ > ~ > ~ S/NR 0
    > ~ > ~ > ~ S/DR 0
    > ~ > ~ > ~ EQM 0000 Hex
    > ~ > ~ > ~ AVG EQM 0000 Hex
    > ~ > ~ > ~ Lower/Upper Edge 0 0 Hz
    > ~ > ~ > ~ Phase Jitter Freq 0 Hz
    > ~ > ~ > ~ Phase Jitter Amp 0.0 deg
    > ~ > ~ > ~ Far Echo Lvl 0 N
    > ~ > ~ > ~ Round Trip Delay 0 msec
    > ~ > ~ > ~ Dropouts > 5dB 0
    > ~ > ~ > ~ RTRNs Init/Accept 0 0
    > ~ > ~ > ~ RRENs Init/Accept 0 0
    > ~ > ~ > ~ BLER 0000 Hex
    > ~ > ~ > ~ RBS Counter 0000 Hex
    > ~ > ~ > ~ Digital Pad Detected NA
    > ~ > ~ > ~ Max SECRXB 85
    > ~ > ~ > ~ Max SECTXB 87
    > ~ > ~ > ~
    > ~ > ~ > ~ -- show modem connect-speeds 36600
    > ~ > ~ > ~
    > ~ > ~ > ~ connect speeds
    > ~ > ~ > ~
    > ~ > ~ > ~ Mdm 26400 28000 28800 29333 30667 31200 32000 33333
    > ~ 33600
    > ~ > ~ TotCnt
    > ~ > ~ > ~ 1/0 0 0 0 0 0 1 0 0
    > ~ 6
    > ~ > ~ 7
    > ~ > ~ > ~ 1/1 2 0 0 0 0 1 0 0
    > ~ 4
    > ~ > ~ 7
    > ~ > ~ > ~ 1/2 1 0 0 0 0 1 0 0
    > ~ 5
    > ~ > ~ 7
    > ~ > ~ > ~ 1/3 1 0 0 0 0 1 0 0
    > ~ 6
    > ~ > ~ 8
    > ~ > ~ > ~
    > ~ > ~ > ~ -- show modem log
    > ~ > ~ > ~
    > ~ > ~ > ~ Modem 1/0 Events Log:
    > ~ > ~ > ~ 2d23h DTR set low
    > ~ > ~ > ~ 2d23h Modem disabled
    > ~ > ~ > ~ 2d23h PPP escape maps set: TX map=00000000 RX map=FFFFFFFF
    > ~ > ~ > ~ 2d23h DTR set high
    > ~ > ~ > ~ 2d23h Modem enabled
    > ~ > ~ > ~ 2d23h Modem disabled
    > ~ > ~ > ~ 2d19h Modem State: Dialing/Answering
    > ~ > ~ > ~ 2d19h CSM: event-MODEM_STARTING_CONNECT New
    > ~ > ~ > ~ State-CSM_CONNECT_INITIATED_STATE
    > ~ > ~ > ~ 2d19h Modem State: Incoming ring
    > ~ > ~ > ~ 2d19h CSM: event-MODEM_ANALOG_CALL_IN New
    > ~ > ~ State-CSM_CONNECT_INITIATED_STATE
    > ~ > ~ > ~ 2d19h Hook state: Off hook
    > ~ > ~ > ~ 2d19h Modem State: Waiting for Carrier
    > ~ > ~ > ~ 2d19h Modem State: Connected
    > ~ > ~ > ~ 2d19h Connection: TX/RX Speed = 31200/24000, Modulation = V34
    > ~ > ~ > ~ Direction = Answer, Protocol = LAPM, Compression =
    > ~ V42bis
    > ~ > ~ > ~ 2d19h CSM: event-MODEM_CONNECTED New State-CONNECTED_STATE
    > ~ > ~ > ~ 2d19h PPP mode active
    > ~ > ~ > ~ 2d19h Modem enabled
    > ~ > ~ > ~ 2d19h PPP escape maps set: TX map=00000000 RX map=FFFFFFFF
    > ~ > ~ > ~ 2d19h PPP escape maps set: TX map=00000000 RX map=00000000
    > ~ > ~ > ~ 2d19h Modem Analog Report: TX = -13, RX = -37, Signal to noise =

    33
    > ~ > ~ > ~ 2d19h Modem State: Retrain Accepted
    > ~ > ~ > ~ 2d19h Connection update: TX/RX Speed = 28800/26400, Modulation =

    V34
    > ~ > ~ > ~ 2d19h Modem State: Connected
    > ~ > ~ > ~ 2d19h Modem State: Disconnecting
    > ~ > ~ > ~ 2d19h CSM: event-MODEM_DISCONNECTED New State-IDLE_STATE
    > ~ > ~ > ~ 2d19h End connection: Retransmits for MNP block (TX/RX) = 0/0
    > ~ > ~ > ~ Duration = 0:00:32, Number of TX/RX char =

    5039/2887
    > ~ > ~ > ~ Local Disc Reason = Remote Link Disc
    > ~ > ~ > ~ Remote Disc Reason = Unknown
    > ~ > ~ > ~ 2d19h Hook state: On hook
    > ~ > ~ > ~ 2d19h Modem State: Idle
    > ~ > ~ > ~ 2d19h DTR set low
    > ~ > ~ > ~ 2d19h DTR set low
    > ~ > ~ > ~ 2d19h Modem disabled
    > ~ > ~ > ~ 2d19h Character mode active
    > ~ > ~ > ~ 2d19h DTR set high
    > ~ > ~ > ~ 2d19h Modem enabled
    > ~ > ~ > ~ 2d19h Modem disabled
    > ~ > ~ > ~ 2d04h Modem State: Dialing/Answering
    > ~ > ~ > ~ 2d04h CSM: event-MODEM_STARTING_CONNECT New
    > ~ > ~ > ~ State-CSM_CONNECT_INITIATED_STATE
    > ~ > ~ > ~ 2d04h Modem State: Incoming ring
    > ~ > ~ > ~ 2d04h CSM: event-MODEM_ANALOG_CALL_IN New
    > ~ > ~ State-CSM_CONNECT_INITIATED_STATE
    > ~ > ~ > ~
    > ~ > ~ > ~
    > ~ > ~ > ~
    > ~ > ~ > ~
    > ~ > ~ > ~
    > ~ > ~ >
    > ~ > ~
    > ~ >
    > ~
    >
    Erik Tamminga, Apr 17, 2004
    #9
  10. Hi Eric,

    ~ Thanks again for your support. I was able to pinpoint and solve the problem!

    Glad to hear you figured this out.

    ~ The problem was PPP compression. Somehow the router and client pc did not
    ~ negotiate the correct compression algorithm. My guess is the router used
    ~ stac compression while the windows side used mppc. I added the "compress
    ~ mppc" command to the group-async1 itnerface and that solved the problem. I
    ~ still find it hard to believe any data crossed the connection with such a
    ~ protocol-mismatch, but it did .... slowly.

    That's really mysterious to me. By default we do not do software
    compression (neither stac nor mppc). So by default, there should
    be no software compression done by either side. If we ARE configured
    to negotiate software compression, then we or the other side should
    both agree on STAC or MPPC.

    So with neither "compress stac" nor "compress mppc" configured
    on the router ... I don't know how the Windows client could decide
    do to MPPC ... I don't recall ever seeing such a problem.

    I'm guessing that maybe you encountered some kind of bug in
    fast switching; by negotiating software compression, you are
    now doing process switching. But that's just a wild stab at it.

    ~ Since Windows 2000 and later do not seem to support stac compression
    ~ anymore, wich is the cisco default, it might be a good idea to add a note
    ~ about this to the configuration examples available on cisco.com.
    ~ I haven't tried newer IOS'es yet, but if this problem also occurs on later
    ~ IOS'es the note might be a good idear.

    At this point, I don't know what to conclude from your experience.
    I do not want to recommend that people turn on "compress mppc" as
    a matter of course, as it's had more than its share of bugs thru
    the years (although I believe it's pretty solid by now); nor would
    we generally recommend "compress stac" - as software compression may
    cause your router to run out of CPU. But if works well in your case,
    I say: more power to you!

    Regards,

    Aaron

    ---


    ~ Again, thanks.
    ~
    ~ Erik Tamminga
    ~
    ~ "Aaron Leonard" <> wrote in message
    ~ news:...
    ~ > Hi Eric,
    ~ >
    ~ > ~ Thanks again for replying. Here is another output of show modem log. It
    ~ > ~ displays two (sorry) short calls. Nothing specials, as far as I can see.
    ~ >
    ~ > I agree, these logs indicate that things are fine at the modem
    ~ > (modulation/EC) layer.
    ~ >
    ~ > ~ Your previous reply got me thinking about the different layers ("Look at
    ~ a
    ~ > ~ call like this at the TCP, PPP, EC and modulation layers and see where
    ~ the
    ~ > ~ problem is). I changed "async mode dedicated" into "async mode
    ~ interactive"
    ~ > ~ to cut off the top two layers. This allowed me to dial into the router
    ~ using
    ~ > ~ Hyperterminal instead of the windows dial-up (PPP) adapter. The
    ~ resulting
    ~ > ~ connection was fine.
    ~ >
    ~ > Good test. That's the one I always do to prove that the router
    ~ > line and the modem link below it are fine.
    ~ >
    ~ > I was able to issue several commands without having to
    ~ > ~ wait for any characters to be echoed back. With this result I think the
    ~ "EC
    ~ > ~ and modulation" layers are fine and I will have to troubleshoot TCP and
    ~ PPP
    ~ > ~ further.
    ~ >
    ~ > Yep. Actually there are three layers there, TCP/IP/PPP.
    ~ >
    ~ > ~ Could you point me into the right direction for troubleshooting TCP/PPP?
    ~ If
    ~ > ~ the modem connection is stable, how could an extra layer PPP/TCP make a
    ~ > ~ connection to the same router (telnet) over the same physical layer
    ~ fail.
    ~ > ~ Any known compatibility issues regarding IOS 12.0(7)T and Windows
    ~ 2000/XP?
    ~ >
    ~ > Well, it's odd that you should have fine performance on the async line
    ~ > but not using TCP/IP/PPP ... but not unheard of!
    ~ >
    ~ > My next test would be to bring up the PPP link to the router. While
    ~ > telnetted into the router from the LAN side, turn on "debug ppp packet",
    ~ > "debug dialer packet" and "debug ip packet" to an access list that
    ~ > matches packets only to/from the client IP address.
    ~ >
    ~ > debugging advice in general: use
    ~ >
    ~ > conf term
    ~ > no logging console
    ~ > no logging rate-limit
    ~ > service timestamp debug date msec
    ~ > logging buffered 50000 debug
    ~ >
    ~ > Then show log after the event to see what happened ... this is the best
    ~ > way to avoid losing any debugging info.
    ~ >
    ~ > Do a ping from the router to the client (or vice versa). Are you losing
    ~ > any? Are the RTTs in the range you would expect (80-250 msec)? If there
    ~ > are problems, do a "show interface async<n>" and do a "modem at s/p" then
    ~ > AT@E1 while the call is connected.
    ~ >
    ~ > I can't think offhand why you should have any particular problem with
    ~ > 12.0(7)T, but on general principle you might try upgrading to most recent
    ~ > 12.1 mainline, as it is basically 12.0(7)T with many generations of
    ~ > bugfixes applied.
    ~ >
    ~ >
    ~ > Aaron
    ~ >
    ~ > ---
    ~ >
    ~ > ~ Regards,
    ~ > ~
    ~ > ~ Erik Tamminga (ccdp)
    ~ > ~
    ~ > ~ StarrenVegDRTR2#sh modem log
    ~ > ~
    ~ > ~ Modem 1/0 Events Log:
    ~ > ~ 00:13:34.836 DC session request: AT\S1
    ~ > ~ 00:08:04.592 Modem State: Dialing/Answering
    ~ > ~ 00:08:04.592 CSM: event-MODEM_STARTING_CONNECT New
    ~ > ~ State-CSM_CONNECT_INITIATED_S
    ~ > ~ TATE
    ~ > ~ 00:08:04.588 Modem State: Incoming ring
    ~ > ~ 00:08:04.588 CSM: event-MODEM_ANALOG_CALL_IN New
    ~ > ~ State-CSM_CONNECT_INITIATED_STA
    ~ > ~ TE
    ~ > ~ 00:08:03.776 Hook state: Off hook
    ~ > ~ 00:08:03.164 Modem State: Waiting for Carrier
    ~ > ~ 00:07:52.800 Modem State: Connected
    ~ > ~ 00:07:51.664 Connection: TX/RX Speed = 28800/28800, Modulation = V34
    ~ > ~ Direction = Answer, Protocol = LAPM, Compression = V42bis
    ~ > ~ 00:07:51.668 CSM: event-MODEM_CONNECTED New State-CONNECTED_STATE
    ~ > ~ 00:07:51.640 Modem enabled
    ~ > ~ 00:07:13.116 PPP mode active
    ~ > ~ 00:07:11.116 PPP escape maps set: TX map=00000000 RX map=FFFFFFFF
    ~ > ~ 00:07:09.116 PPP escape maps set: TX map=00000000 RX map=FFFFFFFF
    ~ > ~ 00:06:56.824 Modem Analog Report: TX = -16, RX = -31, Signal to noise =
    ~ 45
    ~ > ~ 00:06:56.828 Modem State: Disconnecting
    ~ > ~ 00:06:56.828 CSM: event-MODEM_DISCONNECTED New State-IDLE_STATE
    ~ > ~ 00:06:56.824 End connection: Retransmits for MNP block (TX/RX) = 0/0
    ~ > ~ Duration = 0:00:56, Number of TX/RX char = 60/4211
    ~ > ~ Local Disc Reason = Remote Link Disc
    ~ > ~ Remote Disc Reason = Unknown
    ~ > ~ 00:07:18.236 Hook state: On hook
    ~ > ~ 00:07:17.584 DTR set low
    ~ > ~ 00:07:17.728 DTR set low
    ~ > ~ 00:07:17.892 Modem disabled
    ~ > ~ 00:07:18.032 Modem State: Idle
    ~ > ~ 00:07:13.260 Character mode active
    ~ > ~ 00:07:13.416 DTR set high
    ~ > ~ 00:07:13.544 Modem enabled
    ~ > ~ 00:07:07.804 Modem disabled
    ~ > ~
    ~ > ~
    ~ > ~ Modem 1/1 Events Log:
    ~ > ~
    ~ > ~
    ~ > ~ Modem 1/2 Events Log:
    ~ > ~
    ~ > ~
    ~ > ~ Modem 1/3 Events Log:
    ~ > ~ 00:06:54.488 MSMP Reset
    ~ > ~ 00:06:54.520 MSMP Reset
    ~ > ~ 00:06:54.552 Modem State: Dialing/Answering
    ~ > ~ 00:06:54.584 CSM: event-MODEM_STARTING_CONNECT New
    ~ > ~ State-CSM_CONNECT_INITIATED_S
    ~ > ~ TATE
    ~ > ~ 00:06:54.616 Modem State: Incoming ring
    ~ > ~ 00:06:56.276 CSM: event-MODEM_ANALOG_CALL_IN New
    ~ > ~ State-CSM_CONNECT_INITIATED_STA
    ~ > ~ TE
    ~ > ~ 00:06:55.976 Hook state: Off hook
    ~ > ~ 00:06:55.404 Modem State: Waiting for Carrier
    ~ > ~ 00:06:45.280 Modem State: Connected
    ~ > ~ 00:06:44.236 Connection: TX/RX Speed = 26400/26400, Modulation = V34
    ~ > ~ Direction = Answer, Protocol = LAPM, Compression = V42bis
    ~ > ~ 00:06:44.304 CSM: event-MODEM_CONNECTED New State-CONNECTED_STATE
    ~ > ~ 00:06:43.984 Modem enabled
    ~ > ~ 00:06:35.592 PPP mode active
    ~ > ~ 00:06:35.624 PPP escape maps set: TX map=00000000 RX map=FFFFFFFF
    ~ > ~ 00:06:35.656 PPP escape maps set: TX map=00000000 RX map=FFFFFFFF
    ~ > ~ 00:06:33.556 PPP escape maps set: TX map=00000000 RX map=00000000
    ~ > ~ 00:06:35.488 PPP escape maps set: TX map=00000000 RX map=FFFFFFFF
    ~ > ~ 00:06:35.860 PPP escape maps set: TX map=00000000 RX map=00000000
    ~ > ~ 00:01:12.420 Modem Analog Report: TX = -16, RX = -31, Signal to noise =
    ~ 54
    ~ > ~ 00:01:12.456 Modem State: Disconnecting
    ~ > ~ 00:01:12.484 CSM: event-MODEM_DISCONNECTED New State-IDLE_STATE
    ~ > ~ 00:01:12.512 End connection: Retransmits for MNP block (TX/RX) = 0/0
    ~ > ~ Duration = 0:05:37, Number of TX/RX char = 14548/10506
    ~ > ~ Local Disc Reason = Remote Link Disc
    ~ > ~ Remote Disc Reason = Unknown
    ~ > ~ 00:01:12.144 Hook state: On hook
    ~ > ~ 00:01:11.680 DTR set low
    ~ > ~ 00:01:11.712 DTR set low
    ~ > ~ 00:01:11.736 Modem disabled
    ~ > ~ 00:01:11.416 Modem State: Idle
    ~ > ~ 00:01:17.432 PPP escape maps set: TX map=00000000 RX map=FFFFFFFF
    ~ > ~ 00:01:13.708 Character mode active
    ~ > ~ 00:01:13.740 DTR set high
    ~ > ~ 00:01:13.768 Modem enabled
    ~ > ~ 00:01:07.936 Modem disabled
    ~ > ~
    ~ > ~ StarrenVegDRTR2#
    ~ > ~
    ~ > ~
    ~ > ~ "Aaron Leonard" <> wrote in message
    ~ > ~ news:...
    ~ > ~ > On Thu, 15 Apr 2004 08:32:10 +0200, "Erik Tamminga"
    ~ > ~ <> wrote:
    ~ > ~ >
    ~ > ~ > ~ Hi Aaron,
    ~ > ~ > ~
    ~ > ~ > ~ "Terribly slow" means you can't even work in a telnet session to the
    ~ > ~ router
    ~ > ~ > ~ dialed in to and websites (local to the router, few pictures) take
    ~ ages
    ~ > ~ to
    ~ > ~ > ~ load. I know modem connections don't go much faster than 2-4kBps,
    ~ but
    ~ > ~ this
    ~ > ~ > ~ doesn't match experienced throughput. All modems that connect
    ~ connect at
    ~ > ~ > ~ their expected speeds (28800, 33600, etc). Send/receive leds on the
    ~ > ~ client
    ~ > ~ > ~ modems don't indicate full line usage.
    ~ > ~ > ~ I checked to make sure this is not an external problem like slow or
    ~ > ~ failing
    ~ > ~ > ~ dns or bad/instable routing tables. Bad "telnet performance" to the
    ~ > ~ router
    ~ > ~ > ~ dailed-in to confirms this.
    ~ > ~ >
    ~ > ~ > OK. Still, it would be good to collect the modem details for several
    ~ > ~ > calls to see EXACTLY what they look like - to confirm that they are
    ~ > ~ > fine at the modulation and error control layers.
    ~ > ~ >
    ~ > ~ > ~ For example:
    ~ > ~ > ~ dial in to router A (connected at 33k6)
    ~ > ~ >
    ~ > ~ > In PPP?
    ~ > ~ >
    ~ > ~ > ~ telnet to router A (ip address loopback, or any other address of the
    ~ > ~ router)
    ~ > ~ > ~ login and do a "show start" takes ~10 seconds to fill the screen (so
    ~ do
    ~ > ~ > ~ additional pages).
    ~ > ~ > ~ when typing commands (I can actually type them quite fast), I have
    ~ to
    ~ > ~ wait
    ~ > ~ > ~ for the characters to get echod back for ages.
    ~ > ~ >
    ~ > ~ > Sounds to me that you must be getting TCP retransmits and/or errored
    ~ > ~ > PPP packets and/or EC layer retransmits and/or modulation layer
    ~ > ~ > speedshifts/retrains. Look at a call like this at the TCP, PPP,
    ~ > ~ > EC and modulation layers and see where the problem is.
    ~ > ~ >
    ~ > ~ > ~ I can easily reproduce this behaviour because it happens ~100% of
    ~ all
    ~ > ~ > ~ connects. Some people indicated a change of their local modem
    ~ > ~ > ~ errordetection/compression settings (windows 2000 dialup properties)
    ~ > ~ > ~ resulted in some better performance, but I haven't been able to
    ~ confirm
    ~ > ~ > ~ this.
    ~ > ~ > ~
    ~ > ~ > ~ Currently I'm thinking this is some kind of router-line <->
    ~ > ~ > ~ modem-serial-port configuration mismatch.
    ~ > ~ >
    ~ > ~ > I'm skeptical, since NM-AM does not HAVE a serial port.
    ~ > ~ > The DTE link between the router and the modem blade is
    ~ > ~ > thru the PCI bus.
    ~ > ~ >
    ~ > ~ > ~ The reason I think this is that
    ~ > ~ > ~ the output of a show modem configuration 1/0 shows "SERIAL FLOW OFF
    ~ > ~ AT\Q0"
    ~ > ~ > ~ while router-line configuration has "flowcontrol hardware"
    ~ configured.
    ~ > ~ Could
    ~ > ~ > ~ this impact performance?
    ~ > ~ >
    ~ > ~ > No.
    ~ > ~ >
    ~ > ~ > Aaron
    ~ > ~ >
    ~ > ~ > ---
    ~ > ~ >
    ~ > ~ > ~ "Aaron Leonard" <> wrote in message
    ~ > ~ > ~ news:...
    ~ > ~ > ~ > Everything you show below looks fine. Can you quantify
    ~ > ~ > ~ > what "terribly slow" means to you?
    ~ > ~ > ~ >
    ~ > ~ > ~ > The one call you show shows that the call trained at
    ~ > ~ > ~ > 31.2kbps transmit / 24kbps receive which is in the range
    ~ > ~ > ~ > of normalcy for V.34. It does show one retrain during
    ~ > ~ > ~ > the (short) call. If you stay connected longer (like, for
    ~ > ~ > ~ > minutes or hours), do you continue to retrain repetitively?
    ~ > ~ > ~ > What does the modem log show for a call that stays connected
    ~ > ~ > ~ > for a long time and moves much data?
    ~ > ~ > ~ >
    ~ > ~ > ~ > Aaron
    ~ > ~ > ~ >
    ~ > ~ > ~ > ---
    ~ > ~ > ~ >
    ~ > ~ > ~ > ~ Hi,
    ~ > ~ > ~ > ~
    ~ > ~ > ~ > ~ We've setup a C2621 (not the XM, the older) with a NM-8AM module
    ~ to
    ~ > ~ > ~ allow
    ~ > ~ > ~ > ~ for analog dial-in for our mechanics. Setup went smooth but
    ~ > ~ > ~ communications
    ~ > ~ > ~ > ~ didn't. The dial-in succeeds but the connection is terribly
    ~ slow.
    ~ > ~ Any
    ~ > ~ > ~ tips
    ~ > ~ > ~ > ~ on what I can do to pinpoint the problem?
    ~ > ~ > ~ > ~
    ~ > ~ > ~ > ~ Could this have anything to do with mismatched
    ~ > ~ (AT-commands\registers)
    ~ > ~ > ~ and
    ~ > ~ > ~ > ~ line setup? I noticed a "Serial flow OFF AT\Q0" and a "line-
    ~ > ~ flowcontrol
    ~ > ~ > ~ > ~ hardware" do these match? All modem settings are
    ~ factory-defaults.
    ~ > ~ > ~ > ~
    ~ > ~ > ~ > ~ Please advise,
    ~ > ~ > ~ > ~
    ~ > ~ > ~ > ~ Erik
    ~ > ~ > ~ > ~
    ~ > ~ > ~ > ~ Here is our related config / show ... output:
    ~ > ~ > ~ > ~
    ~ > ~ > ~ > ~ -- Relevant async configuration sections
    ~ > ~ > ~ > ~
    ~ > ~ > ~ > ~ interface Loopback0
    ~ > ~ > ~ > ~ ip address 10.240.222.113 255.255.255.240
    ~ > ~ > ~ > ~ no ip directed-broadcast
    ~ > ~ > ~ > ~ !
    ~ > ~ > ~ > ~ ip local pool DIALIN 10.240.222.114 10.240.222.124
    ~ > ~ > ~ > ~ !
    ~ > ~ > ~ > ~ interface Group-Async1
    ~ > ~ > ~ > ~ ip unnumbered Loopback0
    ~ > ~ > ~ > ~ no ip directed-broadcast
    ~ > ~ > ~ > ~ encapsulation ppp
    ~ > ~ > ~ > ~ ip tcp header-compression passive
    ~ > ~ > ~ > ~ dialer in-band
    ~ > ~ > ~ > ~ dialer idle-timeout 600
    ~ > ~ > ~ > ~ dialer-group 1
    ~ > ~ > ~ > ~ async mode dedicated
    ~ > ~ > ~ > ~ peer default ip address pool DIALIN
    ~ > ~ > ~ > ~ no cdp enable
    ~ > ~ > ~ > ~ ppp callback accept
    ~ > ~ > ~ > ~ ppp authentication ms-chap chap
    ~ > ~ > ~ > ~ group-range 33 36
    ~ > ~ > ~ > ~ !
    ~ > ~ > ~ > ~
    ~ > ~ > ~ > ~ line 33 36
    ~ > ~ > ~ > ~ autoselect ppp
    ~ > ~ > ~ > ~ modem InOut
    ~ > ~ > ~ > ~ modem autoconfigure type mica
    ~ > ~ > ~ > ~ rotary 1
    ~ > ~ > ~ > ~ transport input all
    ~ > ~ > ~ > ~ escape-character NONE
    ~ > ~ > ~ > ~ flowcontrol hardware
    ~ > ~ > ~ > ~ !
    ~ > ~ > ~ > ~
    ~ > ~ > ~ > ~ -- Show version
    ~ > ~ > ~ > ~
    ~ > ~ > ~ > ~ Cisco Internetwork Operating System Software
    ~ > ~ > ~ > ~ IOS (tm) C2600 Software (C2600-D-M), Version 12.0(7)T, RELEASE
    ~ > ~ SOFTWARE
    ~ > ~ > ~ > ~ (fc2)
    ~ > ~ > ~ > ~ Copyright (c) 1986-1999 by cisco Systems, Inc.
    ~ > ~ > ~ > ~ Compiled Tue 07-Dec-99 01:20 by phanguye
    ~ > ~ > ~ > ~ Image text-base: 0x80008088, data-base: 0x808D24CC
    ~ > ~ > ~ > ~
    ~ > ~ > ~ > ~ ROM: System Bootstrap, Version 11.3(2)XA4, RELEASE SOFTWARE
    ~ (fc1)
    ~ > ~ > ~ > ~
    ~ > ~ > ~ > ~ StarrenVegDRTR2 uptime is 3 days, 23 hours, 57 minutes
    ~ > ~ > ~ > ~ System returned to ROM by reload at 18:05:47 UTC Tue Feb 27 2001
    ~ > ~ > ~ > ~ System image file is "flash:c2600-d-mz.120-7.T.bin"
    ~ > ~ > ~ > ~
    ~ > ~ > ~ > ~ cisco 2621 (MPC860) processor (revision 0x102) with 26624K/6144K
    ~ > ~ bytes
    ~ > ~ > ~ of
    ~ > ~ > ~ > ~ memory
    ~ > ~ > ~ > ~ .
    ~ > ~ > ~ > ~ Processor board ID JAD045005XI (3965570801)
    ~ > ~ > ~ > ~ M860 processor: part number 0, mask 49
    ~ > ~ > ~ > ~ Bridging software.
    ~ > ~ > ~ > ~ X.25 software, Version 3.0.0.
    ~ > ~ > ~ > ~ Basic Rate ISDN software, Version 1.1.
    ~ > ~ > ~ > ~ 2 FastEthernet/IEEE 802.3 interface(s)
    ~ > ~ > ~ > ~ 1 Serial network interface(s)
    ~ > ~ > ~ > ~ 1 ISDN Basic Rate interface(s)
    ~ > ~ > ~ > ~ 8 terminal line(s) ! (This is the NM-8AM module)
    ~ > ~ > ~ > ~ 32K bytes of non-volatile configuration memory.
    ~ > ~ > ~ > ~ 8192K bytes of processor board System flash (Read/Write)
    ~ > ~ > ~ > ~
    ~ > ~ > ~ > ~ Configuration register is 0x2102
    ~ > ~ > ~ > ~
    ~ > ~ > ~ > ~ -- Show modem
    ~ > ~ > ~ > ~
    ~ > ~ > ~ > ~ Avg Hold Inc calls Out calls Busied Failed
    ~ > ~ No
    ~ > ~ > ~ > ~ Succ
    ~ > ~ > ~ > ~ Mdm Time Succ Fail Succ Fail Out Dial
    ~ > ~ Answer
    ~ > ~ > ~ > ~ Pct.
    ~ > ~ > ~ > ~ 1/0 00:04:03 7 0 0 0 0 0
    ~ > ~ 0
    ~ > ~ > ~ > ~ 100%
    ~ > ~ > ~ > ~ 1/1 00:08:37 7 1 0 0 0 0
    ~ > ~ 0
    ~ > ~ > ~ > ~ 88%
    ~ > ~ > ~ > ~ 1/2 00:07:25 7 0 0 0 0 0
    ~ > ~ 0
    ~ > ~ > ~ > ~ 100%
    ~ > ~ > ~ > ~ 1/3 00:06:04 8 0 0 0 0 0
    ~ > ~ 0
    ~ > ~ > ~ > ~ 100%
    ~ > ~ > ~ > ~ ...
    ~ > ~ > ~ > ~ -- Show modem configuration 1/0 (all others show the same
    ~ output)
    ~ > ~ > ~ > ~
    ~ > ~ > ~ > ~ IDLE 000:01:48
    ~ > ~ > ~ > ~ LAST DIAL
    ~ > ~ > ~ > ~ MODEM HW: PC 2W United States
    ~ > ~ > ~ > ~ - RTS 5 CTS 6 DSR - CD 20 DTR - RI
    ~ > ~ > ~ > ~ MODULATION IDLE
    ~ > ~ > ~ > ~ MODEM BPS 33600 AT%G0
    ~ > ~ > ~ > ~ MODEM FLOW OFF AT\G0
    ~ > ~ > ~ > ~ MODEM MODE AUT AT\N3
    ~ > ~ > ~ > ~ BASE MODE V34 AT%M2
    ~ > ~ > ~ > ~ V.23 OPR. OFF AT%F0
    ~ > ~ > ~ > ~ AUTO ANS. ON ATS0=1
    ~ > ~ > ~ > ~ SERIAL BPS 38400 AT
    ~ > ~ > ~ > ~ BPS ADJUST OFF AT\J0
    ~ > ~ > ~ > ~ SPT BPS ADJ. 0 AT\W0
    ~ > ~ > ~ > ~ ANSWER MESSGS OFF ATQ2
    ~ > ~ > ~ > ~ SERIAL FLOW OFF AT\Q0
    ~ > ~ > ~ > ~ PASS XON/XOFF OFF AT\X0
    ~ > ~ > ~ > ~ PARITY 8N AT
    ~ > ~ > ~ > ~ BREAK 5 AT\K5
    ~ > ~ > ~ > ~ EXIT CHAR 043 ATS2=43
    ~ > ~ > ~ > ~ ANS DUMB MODE OFF AT#E0
    ~ > ~ > ~ > ~ CMD ECHO ON ATE1
    ~ > ~ > ~ > ~ RESULTS ON ATQ0
    ~ > ~ > ~ > ~ RESULT TYPE MNPX ATV1\V2
    ~ > ~ > ~ > ~ CONNECT MSG MDM ATW2
    ~ > ~ > ~ > ~ CONN MNP- 0 AT-M0
    ~ > ~ > ~ > ~ SPEED MATCH 1 AT%L1
    ~ > ~ > ~ > ~ EQUALIZER 1 AT:E1
    ~ > ~ > ~ > ~ FALLBACK 2 AT-Q2
    ~ > ~ > ~ > ~ DATA ECHO OFF AT\E0
    ~ > ~ > ~ > ~ INACT TIMER 00 AT\T0
    ~ > ~ > ~ > ~ AUTO RETRAIN ON AT%E1
    ~ > ~ > ~ > ~ COMPRESSION ALL AT%C3
    ~ > ~ > ~ > ~ MAX BLK SIZE 256 AT\A3
    ~ > ~ > ~ > ~ AUTO BUFF 0 AT\C0
    ~ > ~ > ~ > ~ AUTO CHAR 000 AT%A0
    ~ > ~ > ~ > ~ PAUSE TIME 002 ATS8=2
    ~ > ~ > ~ > ~ DTR 2 AT&D2
    ~ > ~ > ~ > ~ CARR DET 1 AT&C1
    ~ > ~ > ~ > ~ DSR 0 AT\D0
    ~ > ~ > ~ > ~ RING IND 1 AT\R1
    ~ > ~ > ~ > ~ LEASE LINE 0 AT&L0
    ~ > ~ > ~ > ~ LNG SPC DISC OFF ATY0
    ~ > ~ > ~ > ~ BUSIED OUT IDLE AT*Y0
    ~ > ~ > ~ > ~ DISC DELAY 000 AT%D0
    ~ > ~ > ~ > ~ RDLB ENABLE OFF AT&T5
    ~ > ~ > ~ > ~ DIAL MODE 4 ATX4
    ~ > ~ > ~ > ~ PULSE DIAL 60% AT&P0
    ~ > ~ > ~ > ~ PULSE MODE N AT%W0
    ~ > ~ > ~ > ~ V23 HD EQU ON AT%O1
    ~ > ~ > ~ > ~ GUARD TONE 0 AT&G0
    ~ > ~ > ~ > ~ DATA CALL TONE OFF AT-C0
    ~ > ~ > ~ > ~ 2ND FC OFF AT-F0
    ~ > ~ > ~ > ~ NM BIT VALUE 0 AT-E0
    ~ > ~ > ~ > ~ PAR CHK 0 AT-P0
    ~ > ~ > ~ > ~ MANUAL DIAL 0 AT:D0
    ~ > ~ > ~ > ~ UPSHIFT BPS OFF AT*H0
    ~ > ~ > ~ > ~ CELLULAR OFF AT)M0
    ~ > ~ > ~ > ~ LINETYPE 000 AT@M0
    ~ > ~ > ~ > ~ DETECT PHASE ON AT-J1
    ~ > ~ > ~ > ~ MNP EXT SVC 2 AT-K2
    ~ > ~ > ~ > ~ UNIV V.23 1 AT-V1
    ~ > ~ > ~ > ~ CONNECT MSG 1ST AT@C0
    ~ > ~ > ~ > ~ DUMB MODE OFF AT-H0
    ~ > ~ > ~ > ~ BELL ON ATB1
    ~ > ~ > ~ > ~ CALL ABT DISAB OFF AT-Y0
    ~ > ~ > ~ > ~ REVERSE ANS OFF AT-W0
    ~ > ~ > ~ > ~ MIN CONN SPD 300 AT@U
    ~ > ~ > ~ > ~ MU-LAW/A_LAW MU-L AT"A0
    ~ > ~ > ~ > ~ REM CHAR 042 AT*S42
    ~ > ~ > ~ > ~
    ~ > ~ > ~ > ~ -- SHow modem version
    ~ > ~ > ~ > ~
    ~ > ~ > ~ > ~ Slot 1:MCOM Analog Integrated Modem Firmware Version 1.2.0
    ~ > ~ > ~ > ~ Source: IOS
    ~ > ~ > ~ > ~ Boot firmware: 1.1.5
    ~ > ~ > ~ > ~ MIMIC firmware: 1.3.3
    ~ > ~ > ~ > ~ Modem firmware: 2.3.8
    ~ > ~ > ~ > ~ DSP firmware: 0.0.2
    ~ > ~ > ~ > ~
    ~ > ~ > ~ > ~ -- Show modem operational-status
    ~ > ~ > ~ > ~
    ~ > ~ > ~ > ~ MNP Class 10 V.34 Modem
    ~ > ~ > ~ > ~ MODEM HW: PC 2W United States
    ~ > ~ > ~ > ~ Firmware Rev 2.3.9/85
    ~ > ~ > ~ > ~ DSP C36 Part/Rev 3635 4241
    ~ > ~ > ~ > ~ DSP C58 Part/Rev 3635 2041
    ~ > ~ > ~ > ~ DSP Controller Rev 0.0
    ~ > ~ > ~ > ~ DSP Data Pump Rev 0.0
    ~ > ~ > ~ > ~ Connect Time 000:01:48
    ~ > ~ > ~ > ~ - RTS 5 CTS 6 DSR - CD 20 DTR - RI
    ~ > ~ > ~ > ~ Disconnect Remote - Local - 14,9
    ~ > ~ > ~ > ~
    ~ > ~ > ~ > ~ Mod Type IDLE
    ~ > ~ > ~ > ~ TX/RX Spd ***** ***** BPS
    ~ > ~ > ~ > ~ TX/RX Spd Mask NA BFFF Hex
    ~ > ~ > ~ > ~ Symbol Rate 2400 Hz
    ~ > ~ > ~ > ~ TX/RX Carrier Freq 1600 1600 Hz
    ~ > ~ > ~ > ~ TX/RX States 16 16
    ~ > ~ > ~ > ~ TX/RX NLE OFF OFF
    ~ > ~ > ~ > ~ TX/RX Precoding OFF OFF
    ~ > ~ > ~ > ~ TX/RX Shaping OFF OFF
    ~ > ~ > ~ > ~ TX Preemphasis Index 0
    ~ > ~ > ~ > ~ TX Lvl REG - 13 dBm
    ~ > ~ > ~ > ~ TX Lvl RAM - 0 dB
    ~ > ~ > ~ > ~ TX Lvl Reduct 0 dB
    ~ > ~ > ~ > ~ TX Lvl - 13 dBm
    ~ > ~ > ~ > ~ RX Lvl - 33 dBm
    ~ > ~ > ~ > ~ S/NR 0
    ~ > ~ > ~ > ~ S/DR 0
    ~ > ~ > ~ > ~ EQM 0000 Hex
    ~ > ~ > ~ > ~ AVG EQM 0000 Hex
    ~ > ~ > ~ > ~ Lower/Upper Edge 0 0 Hz
    ~ > ~ > ~ > ~ Phase Jitter Freq 0 Hz
    ~ > ~ > ~ > ~ Phase Jitter Amp 0.0 deg
    ~ > ~ > ~ > ~ Far Echo Lvl 0 N
    ~ > ~ > ~ > ~ Round Trip Delay 0 msec
    ~ > ~ > ~ > ~ Dropouts > 5dB 0
    ~ > ~ > ~ > ~ RTRNs Init/Accept 0 0
    ~ > ~ > ~ > ~ RRENs Init/Accept 0 0
    ~ > ~ > ~ > ~ BLER 0000 Hex
    ~ > ~ > ~ > ~ RBS Counter 0000 Hex
    ~ > ~ > ~ > ~ Digital Pad Detected NA
    ~ > ~ > ~ > ~ Max SECRXB 85
    ~ > ~ > ~ > ~ Max SECTXB 87
    ~ > ~ > ~ > ~
    ~ > ~ > ~ > ~ -- show modem connect-speeds 36600
    ~ > ~ > ~ > ~
    ~ > ~ > ~ > ~ connect speeds
    ~ > ~ > ~ > ~
    ~ > ~ > ~ > ~ Mdm 26400 28000 28800 29333 30667 31200 32000 33333
    ~ > ~ 33600
    ~ > ~ > ~ TotCnt
    ~ > ~ > ~ > ~ 1/0 0 0 0 0 0 1 0 0
    ~ > ~ 6
    ~ > ~ > ~ 7
    ~ > ~ > ~ > ~ 1/1 2 0 0 0 0 1 0 0
    ~ > ~ 4
    ~ > ~ > ~ 7
    ~ > ~ > ~ > ~ 1/2 1 0 0 0 0 1 0 0
    ~ > ~ 5
    ~ > ~ > ~ 7
    ~ > ~ > ~ > ~ 1/3 1 0 0 0 0 1 0 0
    ~ > ~ 6
    ~ > ~ > ~ 8
    ~ > ~ > ~ > ~
    ~ > ~ > ~ > ~ -- show modem log
    ~ > ~ > ~ > ~
    ~ > ~ > ~ > ~ Modem 1/0 Events Log:
    ~ > ~ > ~ > ~ 2d23h DTR set low
    ~ > ~ > ~ > ~ 2d23h Modem disabled
    ~ > ~ > ~ > ~ 2d23h PPP escape maps set: TX map=00000000 RX map=FFFFFFFF
    ~ > ~ > ~ > ~ 2d23h DTR set high
    ~ > ~ > ~ > ~ 2d23h Modem enabled
    ~ > ~ > ~ > ~ 2d23h Modem disabled
    ~ > ~ > ~ > ~ 2d19h Modem State: Dialing/Answering
    ~ > ~ > ~ > ~ 2d19h CSM: event-MODEM_STARTING_CONNECT New
    ~ > ~ > ~ > ~ State-CSM_CONNECT_INITIATED_STATE
    ~ > ~ > ~ > ~ 2d19h Modem State: Incoming ring
    ~ > ~ > ~ > ~ 2d19h CSM: event-MODEM_ANALOG_CALL_IN New
    ~ > ~ > ~ State-CSM_CONNECT_INITIATED_STATE
    ~ > ~ > ~ > ~ 2d19h Hook state: Off hook
    ~ > ~ > ~ > ~ 2d19h Modem State: Waiting for Carrier
    ~ > ~ > ~ > ~ 2d19h Modem State: Connected
    ~ > ~ > ~ > ~ 2d19h Connection: TX/RX Speed = 31200/24000, Modulation = V34
    ~ > ~ > ~ > ~ Direction = Answer, Protocol = LAPM, Compression =
    ~ > ~ V42bis
    ~ > ~ > ~ > ~ 2d19h CSM: event-MODEM_CONNECTED New State-CONNECTED_STATE
    ~ > ~ > ~ > ~ 2d19h PPP mode active
    ~ > ~ > ~ > ~ 2d19h Modem enabled
    ~ > ~ > ~ > ~ 2d19h PPP escape maps set: TX map=00000000 RX map=FFFFFFFF
    ~ > ~ > ~ > ~ 2d19h PPP escape maps set: TX map=00000000 RX map=00000000
    ~ > ~ > ~ > ~ 2d19h Modem Analog Report: TX = -13, RX = -37, Signal to noise =
    ~ 33
    ~ > ~ > ~ > ~ 2d19h Modem State: Retrain Accepted
    ~ > ~ > ~ > ~ 2d19h Connection update: TX/RX Speed = 28800/26400, Modulation =
    ~ V34
    ~ > ~ > ~ > ~ 2d19h Modem State: Connected
    ~ > ~ > ~ > ~ 2d19h Modem State: Disconnecting
    ~ > ~ > ~ > ~ 2d19h CSM: event-MODEM_DISCONNECTED New State-IDLE_STATE
    ~ > ~ > ~ > ~ 2d19h End connection: Retransmits for MNP block (TX/RX) = 0/0
    ~ > ~ > ~ > ~ Duration = 0:00:32, Number of TX/RX char =
    ~ 5039/2887
    ~ > ~ > ~ > ~ Local Disc Reason = Remote Link Disc
    ~ > ~ > ~ > ~ Remote Disc Reason = Unknown
    ~ > ~ > ~ > ~ 2d19h Hook state: On hook
    ~ > ~ > ~ > ~ 2d19h Modem State: Idle
    ~ > ~ > ~ > ~ 2d19h DTR set low
    ~ > ~ > ~ > ~ 2d19h DTR set low
    ~ > ~ > ~ > ~ 2d19h Modem disabled
    ~ > ~ > ~ > ~ 2d19h Character mode active
    ~ > ~ > ~ > ~ 2d19h DTR set high
    ~ > ~ > ~ > ~ 2d19h Modem enabled
    ~ > ~ > ~ > ~ 2d19h Modem disabled
    ~ > ~ > ~ > ~ 2d04h Modem State: Dialing/Answering
    ~ > ~ > ~ > ~ 2d04h CSM: event-MODEM_STARTING_CONNECT New
    ~ > ~ > ~ > ~ State-CSM_CONNECT_INITIATED_STATE
    ~ > ~ > ~ > ~ 2d04h Modem State: Incoming ring
    ~ > ~ > ~ > ~ 2d04h CSM: event-MODEM_ANALOG_CALL_IN New
    ~ > ~ > ~ State-CSM_CONNECT_INITIATED_STATE
    ~ > ~ > ~ > ~
    ~ > ~ > ~ > ~
    ~ > ~ > ~ > ~
    ~ > ~ > ~ > ~
    ~ > ~ > ~ > ~
    ~ > ~ > ~ >
    ~ > ~ > ~
    ~ > ~ >
    ~ > ~
    ~ >
    ~
    Aaron Leonard, Apr 20, 2004
    #10
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