Summary: | ASTERISK-04066: [patch] g.729 codec one way audio in chan_h323 with Cisco CCM | ||
Reporter: | pbd (pbd) | Labels: | |
Date Opened: | 2005-05-04 12:35:39 | Date Closed: | 2008-01-15 15:34:00.000-0600 |
Priority: | Major | Regression? | No |
Status: | Closed/Complete | Components: | Core/General |
Versions: | Frequency of Occurrence | ||
Related Issues: | |||
Environment: | Attachments: | ( 0) 729codecneg.log ( 1) ast-h323-cisco.diff | |
Description: | As of latest CVS-HEAD, I am able to bring up and successfully send and receive calls between Asterisk and Cisco Callmanager using Ulaw. CCM is limited in it's own transcoding to using ulaw, alaw, or g.729- GSM and other formats can only be transcoded using external hardware resources. I purchased two g.729 licenses from Digium, and configured for g.729, in an attempt to get a compressed codec working. Unfortunately, the result is one-way audio- From CCM to Asterisk works, from Asterisk to CCM, no audio is present. Silence suppression is on on the CCM side- that's configured clusterwide, not on a per-trunk basis. My g.729 calls go through fine under SIP, however, CCM cannot originate SIP calls in 729, only receive them- I'd prefer h.323 in my application, and it's a major bug if it doesn't work properly under anything other than ulaw. I've attached a trace of the call going through- signalling is normal, channel setup looks great- the difference is that Asterisk signals 729annexA for the channel, Cisco signals 729 (no annex)- in theory, it should work from there, as the g729 codec is supposed to support both. There's a lot of 'supposed to' in this bug- I'm happy to accept suggestions. | ||
Comments: | By: Paul Cadach (pcadach) 2005-05-04 14:19:00 This is known Cisco's "feature" - to tell invalid IP address/port on OLC but report correct one on OLCAck. By: Paul Cadach (pcadach) 2005-05-04 14:37:28 Try attached patch with both ulaw and g729 codecs (probably with FastStart enabled too). By: Paul Cadach (pcadach) 2005-05-04 15:05:14 FastStart/SlowStart tested with OpenPhone. CCM uses SlowStart only so all should be fine. By: pbd (pbd) 2005-05-04 15:43:54 Patch works perfectly. Question is, should this be included always, or should there be a 'LinkIsCCM=' flag in h323.conf to handle this? Seems very application specific to me, but I havent read the RFC on H.323 to know if it's appropriate to use what's on the ACK over the OLC. Thanks again. Rasperrys to Cisco. By: Paul Cadach (pcadach) 2005-05-04 21:58:32 An idea is going from cwhuang's patch. Ready to commit. By: jerjer (jerjer) 2005-05-11 09:16:38 commited to cvs -head. By: jerjer (jerjer) 2005-05-11 09:16:51 not in -stable. By: Digium Subversion (svnbot) 2008-01-15 15:34:00.000-0600 Repository: asterisk Revision: 5627 U trunk/channels/h323/ast_h323.cpp ------------------------------------------------------------------------ r5627 | jeremy | 2008-01-15 15:34:00 -0600 (Tue, 15 Jan 2008) | 2 lines Fix one way audio with some broken Endpoints and to shut bkw up. Bug ASTERISK-4066 ------------------------------------------------------------------------ http://svn.digium.com/view/asterisk?view=rev&revision=5627 |