No video when using B2B SIP inbound dial from 3rd external endpoint via Expressway E&C to Jabber internal

[dietybright]

Hello,

Our scenario is setup B2B SIP URI dial 

When SIP inbound dial from 3rd external endpoint via Expressway E&C to Jabber internal, it has some media issue as below:

 (1) SIP dial from 3rd external endpoint to Jabber inside (IP address on User-vlan, different vlan with CUCM, Expressway-C vlan) : only audio, not video
 (2) SIP dial from 3rd external endpoint to Jabber inside (IP address on VOIP-vlan, same vlan with CUCM, Expressway-C vlan) : both audio and video

There are no firewall between VOIP-vlan and User-vlan

I checked the wireshark logs on Jabber client on Window, it's so weird:

- No.(1) Media traffic exchange between Jabber client (10.161.23.200) and Voice Gateway (10.161.48.10). Attached file wireshark.vlan23.png

- No.(2) Media traffic exchange between Jabber client (10.161.48.240) and Expressway-C (10.161.48.22). Attached file wireshark.vlan48.png

I checked configuration on CUCM side, no SRST applied to Device Pool. It seems CUCM (10.161.48.9) forward media traffic to Voice Gateway.

Thanks for all your answers,

Sy

[Ammar Saood]

Media flows directly between EXPC and the Jabber. 

3rd party external endpoint call reaches eXPC and then EXPC conncts the media directly to jabber after jabber answers.

may be a firewall issue. can you replicate this setup using another laptop/PC ? 

show us EXPC logs. so we can have better understanding what is happening there. 

[Joe Vallender]

Sounds like your Jabber implementation has not been configured for 'escalation to multipoint' properly using an MCU or TP server.

[dietybright]

Thanks for all your answers,

I found the reason is Device Mobility Infos function. Then I have to create new subnet for Jabber endpoint.

Thanks,

Sy