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Summary:ASTERISK-10849: Hook-Flash behaviour results in echo-cancellation disabled on channel during call.
Reporter:rebuild (rebuild)Labels:
Date Opened:2007-11-21 06:39:09.000-0600Date Closed:2008-03-10 15:25:27
Priority:MinorRegression?No
Status:Closed/CompleteComponents:Channels/chan_zap
Versions:Frequency of
Occurrence
Related
Issues:
Environment:Attachments:
Description:
With asterisk 1.4.11, during a standard call, 'zap show channel 1' reports echo cancellation as 'ON'.  With call waiting, accepting the second call keeps echo cancellation as expected.

When on a single call, pressing hook-flash to get a second dial tone turns off echo cancellation.   If you successfully dial another number, echo cancellation is renegotiated, and is set correctly for that call.   Hanging up, will result in the call on hold 'calling back' the hand set.  When you pick up the hand set, you hear a screech, and 'zap show channel 1' shows echo cancellation as disabled, and you hear echo during the call after resuming.
 
Upgrading to 1.4.12/13/14 changed this behaviour slightly.   Now echo cancellation is disabled by hook-flash, and remains disabled, even when hook-flash is used to resume the call on hold.


****** ADDITIONAL INFORMATION ******


ZAP Hardware:  TDM400P 3FXS 1FXO, nothing plugged into FXO, all calls are VOIP.

Reproducible Sequence:
Call *43 (echo test) 'zap show channel 1' shows echo cancellation ON
Press Hook Flash, listen for dial tone.
Hang-Up.
Listen for callback from existing 'on hold' call.
Pickup phone.
Resume 'echo test'. Note added echo effects, and possible audio screech..
'zap show channel 1' shows echo cancellation OFF
Comments:By: rebuild (rebuild) 2007-11-21 06:41:35.000-0600

NOTE.

If you vary the above sequence.
1) call echo test
2) hook flash
3) listen for dial tone.
4) zap show channel 1 shows echo cancellation OFF.
5) press hook flash
6) resume call
7) zap show channel 1 shows echo cancellation ON.

This applies to 1.4.11 only.
Asterisk 1.4.12 and above show echo cancellation OFF at step 7
By: Digium Subversion (svnbot) 2008-03-10 15:23:22

Repository: asterisk
Revision: 107173

U   branches/1.4/channels/chan_zap.c

------------------------------------------------------------------------
r107173 | qwell | 2008-03-10 15:23:21 -0500 (Mon, 10 Mar 2008) | 5 lines

Make sure to reenable echo can after a "failed" (canceled, etc) three-way call.

(closes issue ASTERISK-10849)
Reported by: rebuild

------------------------------------------------------------------------

http://svn.digium.com/view/asterisk?view=rev&revision=107173
By: Digium Subversion (svnbot) 2008-03-10 15:24:44

Repository: asterisk
Revision: 107177

_U  trunk/
U   trunk/channels/chan_zap.c

------------------------------------------------------------------------
r107177 | qwell | 2008-03-10 15:24:44 -0500 (Mon, 10 Mar 2008) | 13 lines

Merged revisions 107173 via svnmerge from
https://origsvn.digium.com/svn/asterisk/branches/1.4

........
r107173 | qwell | 2008-03-10 15:27:08 -0500 (Mon, 10 Mar 2008) | 5 lines

Make sure to reenable echo can after a "failed" (canceled, etc) three-way call.

(closes issue ASTERISK-10849)
Reported by: rebuild

........

------------------------------------------------------------------------

http://svn.digium.com/view/asterisk?view=rev&revision=107177
By: Digium Subversion (svnbot) 2008-03-10 15:25:27

Repository: asterisk
Revision: 107180

_U  branches/1.6.0/
U   branches/1.6.0/channels/chan_zap.c

------------------------------------------------------------------------
r107180 | qwell | 2008-03-10 15:25:26 -0500 (Mon, 10 Mar 2008) | 21 lines

Merged revisions 107177 via svnmerge from
https://origsvn.digium.com/svn/asterisk/trunk

................
r107177 | qwell | 2008-03-10 15:28:33 -0500 (Mon, 10 Mar 2008) | 13 lines

Merged revisions 107173 via svnmerge from
https://origsvn.digium.com/svn/asterisk/branches/1.4

........
r107173 | qwell | 2008-03-10 15:27:08 -0500 (Mon, 10 Mar 2008) | 5 lines

Make sure to reenable echo can after a "failed" (canceled, etc) three-way call.

(closes issue ASTERISK-10849)
Reported by: rebuild

........

................

------------------------------------------------------------------------

http://svn.digium.com/view/asterisk?view=rev&revision=107180