asterisk users - Aug 2011 - Asterisk is delaying DTMF (SIP INFO) relay in MeetMe

Hello List,

We are using 'F' parameter in meetme Dialplan application to broadcast
SIP INFO (1 and 0) as DTMF tone to all the participants.
The DTMF configuration for all the connected SIP clients is SIP INFO.

The problem we are seeing, asterisk is taking some time to broadcast the SIP
INFO message to all the participants from the time of its appearance. The time
latency varies from 1.5 sec to 6 sec. We have activated the highest debug and
verbose level but we are not able to track down the problem. Please help us out
to overcome this problem as 6 sec latency is not acceptable in real-time
scenarios. Also if possible let us know (technically), whether it is a know
issue in asterisk.

Regards,
Rajib
Siemens Ltd.
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Hello List,

I have seen that when ever asterisk gets a SIP INFO request from a SIP channel
it generates the requested DTMF tone and writes to the destination channel also
it forwards the SIP INFO message. As I am very new to this domain, it is really
confusing me. Why not asterisk writes only the tone and can avoid forwarding of
SIP INFO? I know I may be wrongly interpreted the things, Can somebody please
explain me the scenario, if possible?

Thanks
Rajib

________________________________
From: Deka, Rajib IN MAA SL
Sent: Monday, August 29, 2011 3:34 PM
To: 'asterisk-users at lists.digium.com'
Subject: Asterisk is delaying DTMF (SIP INFO) relay in MeetMe

Hello List,

We are using 'F' parameter in meetme Dialplan application to broadcast
SIP INFO (1 and 0) as DTMF tone to all the participants.
The DTMF configuration for all the connected SIP clients is SIP INFO.

The problem we are seeing, asterisk is taking some time to broadcast the SIP
INFO message to all the participants from the time of its appearance. The time
latency varies from 1.5 sec to 6 sec. We have activated the highest debug and
verbose level but we are not able to track down the problem. Please help us out
to overcome this problem as 6 sec latency is not acceptable in real-time
scenarios. Also if possible let us know (technically), whether it is a know
issue in asterisk.

Regards,
Rajib
Siemens Ltd.
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