I have an application that is currently running happily on a cluster of asterisk 1.6 servers.
Essentially, Dahdi (PRI) calls are bridged with SIP calls inside a meetme conference. DTMF is passed across the conference (meetme with ‘F’ option).
To implement new features, I need to upgrade the OS and Asterisk on these servers. I have upgraded two test servers to Asterisk 1.11
Now, I find that the DTMF passthrough over the meetme conference between a DAHDI and a SIP leg has problems. Mainly digits are repeated. So, entering 1234567890 might be interpreted as 1233456678900 by the receiving application.
I have tried using relaxdtmf=yes on both the DAHDI and SIP channels, but there is no improvement.
I have tried upgrading to both 1.8 and 1.11 (from 1.6) and the repeated digits problem occurs in both cases. I have searched the web and the usual forums but cannot find a solution.
If anyone can suggest what has changed in 1.8 onwards, or what I might do to solve the issue, your help would be greatly appreciated.