CALL DROP ISSUE

[ibrahimkajeri]

Hello , 

We are facing CALL DROP challenge as well as automatic activation of loudspeaker when answering calls. Extensions with this problems are 106,109 and 112.For other extensions , the issue happens very rare.

Attached is running config .

Pls go through and advise what might be wrong

Router in use is Cisco ISR 4331/K9 and IP phone models are Cisco CP-7821

Thanks,

Ibrahim

[Marco Rojas Abarca]

Dear ibrahimkajeri,

From the running config seems like these devices are registered to CME. CME is no longer supported:

End-of-Sale and End-of-Life Announcement for the Perpetual Licensing for Unified Communications Manager Express Version 14
https://www.cisco.com/c/en/us/products/collateral/unified-communications/unified-communications-manager-express/unified-communications-manager-express-v14-eol.html

Moreover, to provide some additional insight regarding why calls are dropping, debugs will be required while the issue happens. According to what I see, below is the list of the debugs I would say we require:

debug ccsip messages
debug ccsip info
debug voip ccapi inout
debug vpm signal

The above debugs, when the issue happens, is the first step to start the triage on this case.

Hope this information helps,
Sincerely,
Marco R.