[asterisk-users] Unusual DTMF behavior

[Jason Landrey]

We have Digium PRI cards, TE110 and TE420 (with hardware echo cancellation).


On 10/24/07, John Meksavan <jmeksavan at hotmail.com> wrote:
>
>  What is your setup, hardware wise?
>
> If you have the digium cards- FXO or FXS, you must make sure you tune
> them.  I had issues with DTMF's, when I went live with my Asterisk system.
> Once I tune them, everything worked great.
>
> ------------------------------
> Date: Wed, 24 Oct 2007 09:05:35 -0500
> From: landrey21 at gmail.com
> To: asterisk-users at lists.digium.com
> Subject: [asterisk-users] Unusual DTMF behavior
>
> We are having an issue where DTMF is not being sent out right away and the
> tone duration is inconsistent.  For a test we send a '5', then a second
> later we send a '9', and then five seconds later we send a '5'.  If you look
> at the logs below you can see the first '5' is played right away, then the
> '9' comes in and gets queued, but it doesn't start playing until five
> seconds later and it plays for six seconds.  Then the last '5' is played.
>
> The DTMF is coming in as only 'end' packets and we can't change that.  For
> this reason we have turned on rfc2833compensate.  Using Asterisk 1.4.11.
>
> Any ideas?
>
>
> asteriskpri04*CLI>
> < Protocol Discriminator: Q.931 (8)  len=5
> < Call Ref: len= 2 (reference 499/0x1F3) (Terminator)
> < Message type: CONNECT (7)
> q931.c:3371 q931_receive: call 33267 on channel 3 enters state 10 (Active)
> > Protocol Discriminator: Q.931 (8)  len=5
> > Call Ref: len= 2 (reference 499/0x1F3) (Originator)
> > Message type: CONNECT ACKNOWLEDGE (15)
> [Oct 23 10:39:56] DEBUG[6136]: chan_zap.c:1413 zt_enable_ec: Echo
> cancellation already on
>     -- Zap/3-1 answered SIP/test.com-08dc1ef8
>
> [Oct 23 10:39:58] DTMF[13914]: channel.c:2346 __ast_read: DTMF end '5'
> received on SIP/test.com-08dc1ef8, duration 0 ms
> [Oct 23 10:39:58] DTMF[13914]: channel.c :2382 __ast_read: DTMF begin
> emulation of '5' with duration 100 queued on SIP/test.com-08dc1ef8
> [Oct 23 10:39:58] DEBUG[13914]: chan_zap.c:1048 zt_digit_begin: Started
> VLDTMF digit '5'
>
> [Oct 23 10:39:59] DTMF[13914]: channel.c:2346 __ast_read: DTMF end '9'
> received on SIP/test.com-08dc1ef8, duration 0 ms
> [Oct 23 10:39:59] DTMF[13914]: channel.c:2352 __ast_read: DTMF end '9' put
> into dtmf queue on SIP/test.com-08dc1ef8
>
> [Oct 23 10:39:59] DTMF[13914]: channel.c:2434 __ast_read: DTMF end
> emulation of '5' queued on SIP/test.com-08dc1ef8
> [Oct 23 10:39:59] DEBUG[13914]: chan_zap.c:1083 zt_digit_end: Ending
> VLDTMF digit '5'
>
> [Oct 23 10:40:04] DTMF[13914]: channel.c:2215 __ast_read: DTMF begin
> emulation of '9' with duration 100 queued on SIP/test.com-08dc1ef8
> [Oct 23 10:40:04] DEBUG[13914]: chan_zap.c:1048 zt_digit_begin: Started
> VLDTMF digit '9'
> [Oct 23 10:40:04] DTMF[13914]: channel.c:2346 __ast_read: DTMF end '5'
> received on SIP/test.com-08dc1ef8, duration 0 ms
> [Oct 23 10:40:04] DTMF[13914]: channel.c:2352 __ast_read: DTMF end '5' put
> into dtmf queue on SIP/test.com-08dc1ef8
>
> [Oct 23 10:40:10] DTMF[13914]: channel.c:2465 __ast_read: DTMF end
> emulation of '9' queued on SIP/test.com-08dc1ef8
> [Oct 23 10:40:10] DEBUG[13914]: chan_zap.c:1083 zt_digit_end: Ending
> VLDTMF digit '9'
> [Oct 23 10:40:10] DTMF[13914]: channel.c:2215 __ast_read: DTMF begin
> emulation of '5' with duration 100 queued on SIP/test.com-08dc1ef8
> [Oct 23 10:40:10] DEBUG[13914]: chan_zap.c:1048 zt_digit_begin: Started
> VLDTMF digit '5'
>
> [Oct 23 10:40:10] DTMF[13914]: channel.c:2465 __ast_read: DTMF end
> emulation of '5' queued on SIP/test.com-08dc1ef8
> [Oct 23 10:40:10] DEBUG[13914]: chan_zap.c:1083 zt_digit_end: Ending
> VLDTMF digit '5'
>
>
> Thanks,
> Jason
>
>
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