Summary: | ASTERISK-14543: [patch] app_background fails to reliably detect DTMF when echocan module is enabled | ||
Reporter: | Alec Davis (alecdavis) | Labels: | |
Date Opened: | 2009-12-19 21:31:41.000-0600 | Date Closed: | 2011-06-07 14:00:38 |
Priority: | Major | Regression? | No |
Status: | Closed/Complete | Components: | Core/PBX |
Versions: | Frequency of Occurrence | ||
Related Issues: | |||
Environment: | Attachments: | ( 0) bug16473_channel_echocan_switch.diff.txt | |
Description: | DTMF is sucessfully detected 100% of the time by disabling the echocan module by inserting the following line in /etc/modprobe.d/dahdi options wct4xxp vpmsupport=0 Seems like app_background and other like applications need to disbale EC while it's waiting for DTMF digits. ****** ADDITIONAL INFORMATION ****** Asterisk SVN-branch-1.6.1-r235424 libpri version: SVN-branch-1.4-r1374 DAHDI Version: SVN-branch-2.2-r7684 Echo Canceller: MG2 | ||
Comments: | By: Alec Davis (alecdavis) 2009-12-20 10:41:42.000-0600 These are inbound calls from the ISDN into a TE220B - E1 mode, where an asterisk IVR is asking press 1 for Directory, 2 for Sales, 3 for Support etc. By: Alec Davis (alecdavis) 2009-12-20 18:39:36.000-0600 uploaded bug16473_channel_echocan_switch.diff.txt adds to 'echocan' parameter to function CHANNEL() Workaround for our current echocan module issue, we need the echocan for speech calls, but echocan messes with DTMF detection. dialplan:<pre> [ivr2-bdt-day] exten => s,1,Verbose(0,'${CALLERID(num)}' IVR MAIN-DAY) <b><u>exten => s,n,Set(CHANNEL(echocan)=0)</u></b> exten => s,n,Background(silence/1) exten => s,n,Background(bdt/mainbdt-day) exten => s,n,Background(silence/5) exten => s,n,Verbose(0,'${CALLERID(num)}' Nothing Pressed, Default to OPERATOR) <b><u>exten => s,n,Set(CHANNEL(echocan)=1)</u></b> exten => s,n,Dial(${TRUNK}/5066)</pre> ... By: Leif Madsen (lmadsen) 2009-12-21 09:08:51.000-0600 Huh, neat solution :) By: Leif Madsen (lmadsen) 2009-12-21 10:50:55.000-0600 Setting this to acknowledge, as this patch is not really the way to resolve this issue, as it does not fix the underlying issue, which, if this is happening, is a bug in the echocanceller code. By: Leif Madsen (lmadsen) 2009-12-21 10:51:11.000-0600 Per IRC: <kpfleming> if the echocan interferes with DTMF detection then that's a bug in the echocan By: Alec Davis (alecdavis) 2009-12-21 11:18:40.000-0600 Dec 22 06:16:28 astrid kernel: [24869551.561215] VPM450: echo cancellation for 64 channels Dec 22 06:16:34 astrid kernel: [24869557.413249] VPM450: hardware DTMF disabled. Dec 22 06:16:34 astrid kernel: [24869557.413253] VPM450: Present and operational servicing 2 span(s) Dec 22 06:16:34 astrid kernel: [24869557.413257] Completed startup! Dec 22 06:16:34 astrid kernel: [24869557.416551] About to enter startup! Dec 22 06:16:34 astrid kernel: [24869557.416551] TE2XXP: Span 2 configured for CCS/HDB3/CRC4 Dec 22 06:16:34 astrid kernel: [24869557.417509] SPAN 2: Primary Sync Source Dec 22 06:16:34 astrid kernel: [24869557.417510] Completed startup! By: Alec Davis (alecdavis) 2009-12-21 13:21:05.000-0600 2 additonal tests conducted. Test 1: same site as initially reported, swap out TE220P and VPM450 for spare units. Same issues DTMF detection issues. Test 2: different site with same issues, with TE220P and VPM450, applied workaround patch to allow echocan switching on and off, fixes it there too. By: Leif Madsen (lmadsen) 2009-12-21 14:12:44.000-0600 Closing as reporter is working with vendor to correct (not an open source issue). By: Alec Davis (alecdavis) 2010-01-28 17:51:44.000-0600 added relaxdtmf in chan_dahdi.conf as suggested by vendor |