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HI,

I am still very new to this technology. All this lab is on an internal
LAN.

X-Lite Software Telephone - 172.16.130.106
Cisco Fast Ethernet - 172.16.130.248
Cisco BRI connected to the ISDN Line Simulator with numbers 384001 and
384002.

I've seen and searched for several scenario's etc. I have a doubt as
some articles quote that I should use a SIP Proxy as well (like OnDo
Sip Proxy) and some quote that the cisco router can do all the routing
/authentication.

Any Idea from where to start such project? Up to now all i managed to
do is configure the router (2821) lines etc, but i dont know what i
should do more regarding VoIP, authentication and all the rest. Does
anyone know of any article/tips or whatever that can help me?

Below is part of the router configuration related to VoIP.

Note: in this particular scenario I was trying to work with a SIP
proxy, but still nothing is working and I am not sure if this is the
correct way I am working.

isdn switch-type basic-net3
!
voice-card 0
no dspfarm
!
voice service voip
h323
!
voice class codec 1
codec preference 1 g711ulaw
!
voice class h323 1
h225 timeout tcp establish 3
!
interface GigabitEthernet0/0
ip address 172.16.130.248 255.255.255.0
duplex auto
speed auto
no mop enabled
!
interface BRI0/0/0
no ip address
isdn switch-type basic-net3
isdn twait-disable
isdn spid1 384001
isdn spid2 384002
isdn incoming-voice modem
!
dialer-list 1 protocol ip permit
!
control-plane
!
voice-port 0/0/0
input gain -3
output attenuation 4
echo-cancel coverage 24
no comfort-noise
timeouts interdigit 6
!
sip-ua
retry invite 2
retry response 2
retry bye 2
retry cancel 2
sip-server ipv4:172.16.130.22

regards,
0TKN3T
http://www.0tk.net