Modem relay/passthrough is introduced for 2600/3600 routers with 12.2(11)T, is this supported for FXO connection to the PSTN?? as it doesn`t seem to work properly. The modem will answer but not "train up". The Cisco configuration only mentions T1 connectivity.
We are trying to connect a PC/Laptop via FXS port-IP-FXO port to a ISP, using H323. Consequently not sure on the modems used however have tried laptop modem to US Robotics 56k modem and this also fails. Interestingly the call is o.k. across the IP network from FXS to FXS (modem to modem) but not FXS to FXO on the same router and out to PSTN. Have also tried passthrough and that fails as well.
Got the exact same problem here but using FXS interfaces. I tried to have a simple VoIP connection between a 1750 and a 1751V router through a LAN using SIP. I loaded 12.2(4)XM4 IOS in both routers, but still having the same problem.
I worked around the situation by using G.711 codec in dial-peer configuration, but doing this doesn't involve the use of "modem passthrough" feature. Still investigating on this and already have a case opened with Cisco.
SIP traces provide key information in troubleshooting SIP Trunks, SIP
endpoints and other SIP related issues. Even though these traces are in
clear text, these texts can be gibberish unless you understand fully
what they mean. This document attempts to br...
Please find the attached HTML document, download and open it on your PC.
This provides an easy to use form where you simply answer a few
questions and it will render the proper jabber-config.xml file for you
to copy/paste. There is built in logic to verif...
CUCM Database Replication is an area in which Cisco customers and
partners have asked for more in-depth training in being able to properly
assess a replication problem and potentially resolve an issue without
involving TAC. This document discusses the bas...