asterisk users - Jul 2004 - pound key tone generated after call answered?

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

> Message: 1
> Date: Sun, 25 Jul 2004 22:15:32 -0400
> From: Stephen David <steve@davidnj.net>
> To: asterisk-users@lists.digium.com
> Subject: [Asterisk-Users] pound key tone generated after call answered?
> Reply-To: asterisk-users@lists.digium.com
> 
> 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.
> 
Just in case anyone stumbles upon this in the future, i figured it out.  The
problem is not that a # key tone was getting generated on answer, the problem
was that i was setting the CallerID to the same value that I was dialing. 
Apparently it is a feature of certain voicemail systems that it detects this and
automatically goes to voicemail.   that's why if you dial yourself from your
cellphone you get voicemail instead of your greeting.
> 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
> 
whew...

Regards,
Steve