Public bug reported:
Binary package hint: asterisk
The DTMF handling in Asterisk 1.4 (<< 1.4.23) is quite badly broken.
Even in normal usage, we're able to reliably reproduce both
duplication and out-of-order problems when using out-of-band DTMF.
This bug is known upstream and has been fixed in two parts, one in
1.4.18 and one in 1.4.23. I've attached a debdiff of the two patches
from upstream backported to hardy's asterisk. We're running with
these patches in a local package in production and it fixes DTMF for
us.
TEST CASE:
To reproduce: dial a service[1] that will playback DTMF digits to you
and dial strings of DTMF fast, e.g.
00112233445566778899
012345678901234567890123456789
000111222333444555666777888999
Without this patch, you may see duplicated digits or out of order
problems.
Regression potential: should be limited; these are upstream fixes that
are already in later versions that have been released since Feb 2008
and Dec 2008 respectively without problems.
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
[1] e.g. using another asterisk server (with working DTMF!)
| [testing]
| exten => _NXXNXXXXXX,1,Answer()
| exten => _NXXNXXXXXX,n,Wait(1)
| exten => _NXXNXXXXXX,n,Set(TIMEOUT(digit)=30)
| exten => _NXXNXXXXXX,n,Set(TIMEOUT(response)=30)
| exten => _NXXNXXXXXX,n,Playback(beep)
| exten => _NXXNXXXXXX,n,Read(garbage,,255)
| exten => _NXXNXXXXXX,n,SayDigits(${garbage})
| exten => _NXXNXXXXXX,n,Hangup()
** Affects: asterisk (Ubuntu)
Importance: Undecided
Status: New
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broken DTMF handling in asterisk 1.4
https://bugs.launchpad.net/bugs/416762
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