[Asterisk-Users] pound key tone generated after call answered?

[Stephen David]

Hello,

I've been working on an * dialer application, whereby a requirement is that if no one answers the call, a message must be left on voicemail.  I've been using the record(tmp.gsm) function with silence detection enabled to wait for the greeting to finish before speaking.

However, on voicemail systems where you can interrupt the greeting with a pound (#) key to access your voicemail (ie. verizon wireless), the call placed by asterisk appears to be immediately generating a tone (upon answer) that the voicemail system is interpreting as a pound key (#).  I know this because if i listen to tmp.gsm, i hear the tail end of "please enter your password, then press pound.", and NOT "hello, this is steve, please leave message" as i expected.

also of note is that this only happens when dialing using IAX2 with a call termination provider, and not with ZAP and a POTS line.   also note that i've tried two different IAX2 providers with the same resuls.  (using zap and pots lines is not preferrable in this case)

one more note is that i've disabled the 'beep' before the recording starts (commented out lines in app_record.c and re-built code), just in case that was causing it -- no change in behavior, though. 

any thoughts on what could be causing this, or how to further troubleshoot?

Regards,
Steve