Asterisk generates DTMF tones in do_senddigit() in the file channel.c.
The tones are defined in a const char array called dtmf_tones[]. Each
DTMF tone is a string that looks something like:
"!941+1336/100,!0/100", /* 0 */
The part that reads !941+1336/100 is the part that you want. Change the
"100" to something bigger and recompile. You will have to do that for
every tone.
I hope that helps.
Rob
Rich Adamson wrote:
Someone else on the list had a similar problem, and as I recall, they
changed a parameter in asterisk to cause "it" to send longer dtmf
tones. That posting happened within the last couple of months.
Essentially the sip phone sends dtmf signaling via the rfc method
within sip packets (not actual tones), asterisk interprets the
digits, and generates the dtmf tones. I don't have a clue where to
find the asterisk parameter to control that, but would have to guess
it is in a header file within the asterisk source directory.
------------------------
From: Ronald Hartmann <[EMAIL PROTECTED]>
Subject: [Asterisk-Users] DTMF Tone Lengths
Date: Sun, 5 Jun 2005 12:33:12 -0400
Good day,
I am hoping that someone can assist me with a work around.
I have an IVR system that I am attempting to connect asterisk
to, however the IVR was written
Some time ago, and requires tones to be approximately 2 seconds
in length. I am using SIP
Phones, Is there any way to adjust the Length of the Tones that
asterisk sends out the audio path?
Are there any phones that would allow me to hold the "Buttons"
in and generate the tone for the entire length that it was held?
I have exhausted my friend "Google" and I think maybe I just am not
searching correctly, certainly others have crossed this chasm.
Thanks for your direction in this matter.
---------------End of Original Message-----------------
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Robert Tarte
Pacific CodeWorks
P.O. Box 29050
San Francisco, CA 94129
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