I have a 3 server asterisk configuration where one asterisk (say A) (v
1.4.25) has a digiuim card connected to E1 from which calls are routed
to another asterisk server (B) (188.8.131.52) over SIP trunk from which
calls get routed to third server (C) (184.108.40.206) via IAX trunk.
SIP clients are connected to third server. A is the PSTN termination
server, B runs the menu and AGI and C is where SIP clients connect.
SIP clients can also dial outside and call goes like C -> B -> A ->
I have an occasional problem where DTMF is not recognized, ie if
clients type a digit while in menu the system does not register it.
In my C server I saw a log line like this today:
DTMF end '1' has duration 57 but want minimum 80, emulating on IAX2/a16-q1-9657
Is the above message an indication of this problem? How can I fix it?