If you are outside of North America, remember to set the companing to a-law on the voice port - once the call connects the DSP will be dropped and a pure TDM connection made as long as the E1 and BRI companding are the same.
Some external BRI devices don't like to negotiate a TEI, so you can set a static TEI of 0 using the D channel command 'isdn static-tei 0' and doing a shut/no shut on the interface.
If this still does not help, run a debug ISDN Q921 and log the results after plugging in the external unit and performing the shut/no shut on the D channel.
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...