Sound/call quality tweaks (on an SPA3102)...

Discussion in 'UK VOIP' started by Jose, Mar 25, 2008.

  1. Jose

    Jose Guest

    Hi All,

    I've just started using my SPA3102, and wasn't impressed with both the
    sound quality of an incoming PSTN call - I don't know if the person on
    the other side was using a poor cordless phone (?) - and an outgoing
    call to a mobile in a diferent country - not the easiest scnearios, I
    know...

    Still, I've changed "Jitter buffer adjustment" from "up and down" to
    "up only" - trying to increase the buffer so the sound doesn't have
    cuts in the middle, like I noticed today :-(
    Does this seem like a reasonable option?

    Besides, I'm considering fidling with codecs... Apparently G726 should
    allow for fair quality, with smaller packets of data. Right, or not so
    much?? I'm trying G726-32

    Any other codec sugestions, and why you'd choose them? (I'm presently
    using G711a)

    Oh, since the SPA3102 is attached to a router port, I've already setup
    in the router high priority to that port over the others - wich have
    normal priority.

    Regards,
    Jose
     
    Jose, Mar 25, 2008
    #1
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  2. Jose

    PeterW Guest

    (Jose) wrote in
    news::

    > Hi All,
    >
    > I've just started using my SPA3102, and wasn't impressed with both the
    > sound quality of an incoming PSTN call - I don't know if the person on
    > the other side was using a poor cordless phone (?) - and an outgoing
    > call to a mobile in a diferent country - not the easiest scnearios, I
    > know...
    >
    > Still, I've changed "Jitter buffer adjustment" from "up and down" to
    > "up only" - trying to increase the buffer so the sound doesn't have
    > cuts in the middle, like I noticed today :-(
    > Does this seem like a reasonable option?
    >
    > Besides, I'm considering fidling with codecs... Apparently G726 should
    > allow for fair quality, with smaller packets of data. Right, or not so
    > much?? I'm trying G726-32
    >
    > Any other codec sugestions, and why you'd choose them? (I'm presently
    > using G711a)
    >
    > Oh, since the SPA3102 is attached to a router port, I've already setup
    > in the router high priority to that port over the others - wich have
    > normal priority.
    >
    > Regards,
    > Jose
    >


    If you have ADSL/Cable, then G711a is OK unless you have multiple calls.
    Bandwidth is ~85k each way with overheads - quality is the best you'll get
    and equicalent to ISDN.

    G726-32 is DECT quality in half the bandwidth of G711a.

    G711u is comparable to G711a but the North American standard.

    Anything other codec you will probably notice the compression to some
    degree.

    Regards
    Peter
     
    PeterW, Mar 26, 2008
    #2
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  3. Jose

    Jose Guest

    On Wed, 26 Mar 2008 18:21:49 +0000 (UTC), PeterW
    <24.co.uk> wrote:


    >G726-32 is DECT quality in half the bandwidth of G711a.


    One detail I could not find information about: does G726 use the same
    10ms frames as G711?

    I've noticed the diference in sound fidelity, already, after switching
    from G711u to G726-32, but the sound continuity is fautless, and
    fidelity is very much acceptable!

    I understand not all Voip providers are equal when it comes to call
    sound quality, and I notice that particularly when calling mobiles
    "abroad", and even landlines in "far" destinations like Japan, sound
    continuity, in particular, is very easily discernable in such cases,
    between my 2 Voip providers: VoipCheap and VoipFone ;-P

    I'm in Portugal, I could go into detail, but summing up, I've given up
    calling mobiles in the UK using VoipCheap ;-)


    >Anything other codec you will probably notice the compression to some
    >degree.


    I'm willing to lose fidelity, for the sake of continuity and
    synchronism, although other than Voip calls to landlines in Japan
    through Voipcheap, I only have complaints about some calls to mobiles
    - but there, the mobile network probably plays probably the most
    important role :-S


    Best,
    Jose
     
    Jose, Mar 26, 2008
    #3
  4. Pet - www.GymRatZ.co.uk, Mar 27, 2008
    #4
  5. Jose

    Jose Guest

    On Thu, 27 Mar 2008 16:56:49 +0000, "Pet - www.GymRatZ.co.uk"
    <> wrote:

    >> I'm in Portugal, I could go into detail, but summing up, I've given up
    >> calling mobiles in the UK using VoipCheap ;-)

    >
    >Have you found a cheaper way Jose ?
    >Go-on, tell more...


    Actually, yes: http://www.smslisto.com/en/ 5 Euro cents a minute :-D
    I haven't tried it (yet) though.

    Usefull info: http://backsla.sh/betamax

    Regards,
    Jose
     
    Jose, Mar 28, 2008
    #5
  6. Jose wrote:

    > Actually, yes: http://www.smslisto.com/en/ 5 Euro cents a minute :-D
    > I haven't tried it (yet) though.


    Nice one Jose.
    I have just set up an account and cancelled my auto-top-up on
    voipcheap.com Still got a months worth of credit to use, but will
    switch once credit has gone.

    :¬)

    Cheers
    Pete
    --
    http://gymratz.co.uk - Fitness & Gym Equipment/nutrition specialists.
    http://www.trade-price-supplements.co.uk - Bulk buy for up to 33% off.
    http://www.BBE-Boxing-Equipment.co.uk - New Boxing Equipment site.
    http://www.commercial-gym-equipment.co.uk - Commercial Gym Equipment.
     
    Pet - www.GymRatZ.co.uk, Mar 28, 2008
    #6
  7. Jose

    PeterW Guest

    "Pet - www.GymRatZ.co.uk" <> wrote in
    news:fsjau2$hjn$:

    > Jose wrote:
    >
    >> Actually, yes: http://www.smslisto.com/en/ 5 Euro cents a minute :-D
    >> I haven't tried it (yet) though.

    >
    > Nice one Jose.
    > I have just set up an account and cancelled my auto-top-up on
    > voipcheap.com Still got a months worth of credit to use, but will
    > switch once credit has gone.
    >
    >:¬)
    >
    > Cheers
    > Pete


    SMSListo are another of the Betamax clones (like VoipCheap) so I guess the
    technical quality etc. will be basically the same.

    Peter
     
    PeterW, Mar 31, 2008
    #7
  8. PeterW wrote:

    > SMSListo are another of the Betamax clones (like VoipCheap) so I guess the
    > technical quality etc. will be basically the same.


    Should be.
    I wonder if their business model revolves around hooking people up with
    cheap good prices then after a certain period of time sliding the prices
    up whereby the majority of people won't bother to shop around, then
    they start up a whole new business with attractive rates, perhaps
    keeping below a certain tax threshold?

    Don't see why anyone should want to be anti Betamax companies, I've had
    brilliant service from them and unbeatable call savings to mobiles.

    --
    http://gymratz.co.uk - Fitness & Gym Equipment/nutrition specialists.
    http://www.trade-price-supplements.co.uk - Bulk buy for up to 33% off.
    http://www.BBE-Boxing-Equipment.co.uk - New Boxing Equipment site.
    http://www.commercial-gym-equipment.co.uk - Commercial Gym Equipment.
     
    Pet - www.GymRatZ.co.uk, Mar 31, 2008
    #8
  9. Jose

    Jose Guest

    On Mon, 31 Mar 2008 16:19:03 +0100, "Pet - www.GymRatZ.co.uk"
    <> wrote:

    >> SMSListo are another of the Betamax clones (like VoipCheap) so I guess the
    >> technical quality etc. will be basically the same.


    Right... Although were a certain of their servers is, and you are,
    meaning, how far apart, might make a diference, among their offerings
    - making pings to diferent of their servers does return diferent
    values.


    >Don't see why anyone should want to be anti Betamax companies, I've had
    >brilliant service from them and unbeatable call savings to mobiles.


    1) I suppose what you understand by "service" - I certainly never had
    any of my e-mails replied when I first sarted using one of their
    brands, and never heard of anyone who has;
    And if you want a little more service than just cheap calls, you
    definitelly need to look somewhere.

    2) Cheap they are indeed, but when it comes to less "common", or more
    "distant" destinations - such as Japan - I'm not happy with their
    calls, while other Voip provider I use - VoipFone - deliver perfect
    call quality (even to Japan that is)!

    How they can sell so cheap, offer so much of free calls, and if they
    do it legally and fairly, I really don't have a clue.

    There's room for Betamax, and for a lot more sophisticated (and less
    cheap) offers, I guess.

    Regards,
    Jose
     
    Jose, Apr 1, 2008
    #9
  10. Jose

    PeterW Guest

    (Jose) wrote in
    news::

    > On Mon, 31 Mar 2008 16:19:03 +0100, "Pet - www.GymRatZ.co.uk"
    ><> wrote:
    >
    >>> SMSListo are another of the Betamax clones (like VoipCheap) so I
    >>> guess the technical quality etc. will be basically the same.

    >
    > Right... Although were a certain of their servers is, and you are,
    > meaning, how far apart, might make a diference, among their offerings
    > - making pings to diferent of their servers does return diferent
    > values.
    >
    >
    >>Don't see why anyone should want to be anti Betamax companies, I've
    >>had brilliant service from them and unbeatable call savings to
    >>mobiles.

    >
    > 1) I suppose what you understand by "service" - I certainly never had
    > any of my e-mails replied when I first sarted using one of their
    > brands, and never heard of anyone who has;
    > And if you want a little more service than just cheap calls, you
    > definitelly need to look somewhere.
    >
    > 2) Cheap they are indeed, but when it comes to less "common", or more
    > "distant" destinations - such as Japan - I'm not happy with their
    > calls, while other Voip provider I use - VoipFone - deliver perfect
    > call quality (even to Japan that is)!
    >
    > How they can sell so cheap, offer so much of free calls, and if they
    > do it legally and fairly, I really don't have a clue.
    >
    > There's room for Betamax, and for a lot more sophisticated (and less
    > cheap) offers, I guess.
    >
    > Regards,
    > Jose
    >
    >
    >


    The VoipCheap & SMSListo SIP servers are identical - they have load-
    balancing on their DNS hance the different order. Betamax offer a generally
    good service at a great price.

    > sip.voipcheap.com

    Server: UnKnown
    Address: 192.168.1.250

    Non-authoritative answer:
    sip.voipcheap.com internet address = 194.221.62.198
    sip.voipcheap.com internet address = 194.120.0.198

    voipcheap.com nameserver = ns2.betamax.com
    voipcheap.com nameserver = ns3.betamax.com
    voipcheap.com nameserver = ns1.betamax.com
    ns2.betamax.com internet address = 194.120.0.222
    ns3.betamax.com internet address = 194.221.62.222
    ns1.betamax.com internet address = 80.239.235.221
    > sip.smslisto.com

    Server: UnKnown
    Address: 192.168.1.250

    Non-authoritative answer:
    sip.smslisto.com internet address = 194.120.0.198
    sip.smslisto.com internet address = 194.221.62.198

    smslisto.com nameserver = ns1.betamax.com
    smslisto.com nameserver = ns3.betamax.com
    smslisto.com nameserver = ns2.betamax.com
    ns3.betamax.com internet address = 194.221.62.222
    ns1.betamax.com internet address = 80.239.235.221
    ns2.betamax.com internet address = 194.120.0.222
     
    PeterW, Apr 1, 2008
    #10
  11. Jose

    Chris Davies Guest

    Jose <> wrote:
    > Actually, yes: http://www.smslisto.com/en/ 5 Euro cents a minute :-D
    > I haven't tried it (yet) though.


    I switched over yesterday and the call quality seems pretty much
    the same. Thank you for that link, Jose - I had only 0.12 € left with
    voipcheap.com, so it was just in time.

    Chris
     
    Chris Davies, Apr 2, 2008
    #11
  12. Chris Davies wrote:

    > I switched over yesterday and the call quality seems pretty much
    > the same. Thank you for that link, Jose - I had only 0.12 € left with
    > voipcheap.com, so it was just in time.
    >
    > Chris


    Can you enable auto top-up Chris?
    It wouldn't let me add more credit as I already had enough.

    --
    http://gymratz.co.uk - Fitness & Gym Equipment/nutrition specialists.
    http://www.trade-price-supplements.co.uk - Bulk buy for up to 33% off.
    http://www.BBE-Boxing-Equipment.co.uk - New Boxing Equipment site.
    http://www.commercial-gym-equipment.co.uk - Commercial Gym Equipment.
     
    Pet - www.GymRatZ.co.uk, Apr 2, 2008
    #12
  13. Jose

    Jose Guest

    On Tue, 1 Apr 2008 17:20:41 +0000 (UTC), PeterW
    <24.co.uk> wrote:

    >The VoipCheap & SMSListo SIP servers are identical - they have load-
    >balancing on their DNS hance the different order. Betamax offer a generally


    >Non-authoritative answer:
    >sip.voipcheap.com internet address = 194.221.62.198
    >sip.voipcheap.com internet address = 194.120.0.198
    >
    >Non-authoritative answer:
    >sip.smslisto.com internet address = 194.120.0.198
    >sip.smslisto.com internet address = 194.221.62.198



    I must confess I'm surprised... I do get significant diferent ping
    times, though, if I ping VoipCheap and VoipBuster, for instance.

    Thanks,
    Jose
     
    Jose, Apr 2, 2008
    #13
  14. Jose

    Chris Davies Guest

    Chris Davies wrote:
    > I switched over yesterday and the call quality seems pretty much
    > the same. Thank you for that link, Jose - I had only 0.12 € left with
    > voipcheap.com, so it was just in time.



    Pet - www.GymRatZ.co.uk <> wrote:
    > Can you enable auto top-up Chris?
    > It wouldn't let me add more credit as I already had enough.


    Which, on smslisto? No thanks; not until I know it's working fine for me.
    (Based on my last purchase at voipcheap, it'll take around 4-6 weeks to
    use up my credit.)

    Chris
     
    Chris Davies, Apr 3, 2008
    #14
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