----- Original Message -----
Sent: Wednesday, August 13, 2003 9:40
AM
Subject: Re: [Asterisk-Users] Weird DTMF
issue
Ok, I think I figured out the
problem
If both the phone and asterisk are using RFC2833,
I get this DTMF problem. But, If I set both the phone and Asterisk to
DTMF=inband, the DTMF tones sound much better. (I verified the DTMF status of
the call by doing "sip show channel ?" in the CLI)
Is there a known problem with RFC2833 in
Asterisk? (Note, this would only happen when Asterisk acts as a SIP endpoint
in the Call, like when a SIP phone calls out through the FXO port not when the
call is just passing through the server).
There is also a thread about how the XTEN
softphone seems to have a DTMF problem. XTEN says they fixed it, but people
(including myself) still see the problem. I wonder if there is a bug in
Asterisk support of RFC2833? One of the XTEN users says that one way the
problem shows up is if you send a string of DTMF's that are the same number
(1001 fails , but 1234 works). I have seen the same issue on a Cisco phone
ascessing VM on an Asterisk server.
Lee Goodman
----- Original Message -----
Sent: Tuesday, August 12, 2003 4:32
PM
Subject: [Asterisk-Users] Weird DTMF
issue
Can anyone explain why this is
happening?
I have a server attached to a phone line that
will play a .wav file, then play all the dtmf digits (after it answers the
call). If I place a call from a SIP device (like a Cisco 7960 phone) through
Asterisk and on to the test server, via PSTN, the .wav file sounds fine, but
the DTMF digits are distorted
----->------------->--------------------audio in this direction
------>-------------------->-------------------->
[test server that plays .wav file then DTMF
digits] -----PSTN-------[Asterisk]-----SIP----[Cisco 7960]
----<------------------------------------call setup in this
direction ---------<---------------< ---------------<
The Asterisk is set for DTMF=inband , codec
g711ulaw
