We have been looking at this issue and have found that the SIP trunk providers connection to the PSTN does not support H.323 (H245) traffic in their network. Have you (or anyone else) found a SIP trunk provider that supports video over SIP?
Yes, CUCM 7.x supports video stream for calls across a SIP trunk. The default behavior of CUCM is to send a SIP INVITE without SDP (also called as SIP Delayed offer) while placing an outbound call across SIP trunk. Depending on SIP-Phone-2's codec capabilities (as advertised in the SDP offer in 18x / 200 OK SIP response), CUCM will setup audio only or video & audio call.
In your scenario, does the outbound SIP invite from CUCM have SDP? If yes, is MTP enabled on the SIP Trunk?
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...