[cisco-voip] Delay in CNG detect - Connect first

[Banerjee, Subhrojyoti (Network CC)]

Hi All,

I'm trying to figure out why the TCL is taking more than usual 2 CNG cycles (9 sec) to detect the tone. After connecting to the VM I can hear the fax send the CNG tone every 3 sec approximately. However it takes almost 8-10 cycles to get the tone detected at Cisco end. I looked at the debugs for one call and it was about 33 sec. This is not something uniform and the time varies from call to call (same fax but multiple calls), between 25-35 sec.

Apr 17 17:54:54.183 CEST: //13828//TCL :/tcl_PutsObjCmd: [Call 13828] Setting-up a VOICE call
:
:
Apr 17 17:55:27.972 CEST: //13828//TCL :/tcl_PutsObjCmd: [Call 13828] A CNG tone was detected!

This is not desired since for voice prompts which are small, fax tone will not be detected at all.

Thanks in advance,

Subhrojyoti

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