No Audio for Jabber Calls through Expressway

[Remon Adel]

Dears 

we have this MRA solutions

CUCM 11.5
IMP 11.5
EXP-C 12.3
EXP-E 12.3   Dual NIC Mode


Clients Can login successfully using Jabber ( Android and Windows ) and Jabber get registered on CUCM.
when they can call each other and when calls answered there's no audio .

we checked nat setting on EXP-E (External interface ) and all setting is good .
, all RTP ports  between Public internet and expressway-E are opened alco between EXP-C and EXP-E.
Also we checked nat on FW .

So please advise us how can we get the main reason of this issue .

[Anurag Srivastava1]

Hello,

I will suggest to take pcap on client jabber pc and diagnostics logs on both expresswayc/E and pcap on internal endpoint as well and see on which point it is getting dropped?

Most of the time it is firewall but you can only see through pcaps.

Thanks

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