It depends on the direction of the call. If the router makes the call to the PSTN/PABX, then the progress tones would have to come from the external device to give an indication of the call state. Ifg the router accepts the call from the PSTN/PBX, then it will have to generate the tones in band towards the caller to let them know the state of the call.
Depending on the progress tone, the router can determine what is happening with the call. If the remote device returns a busy/subscriber out of order, this can be mapped across to a VOIP clearing code, likewise the R2 answer signal is seen on the router as a Connect,
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...