[asterisk-users] G722.1C Configuration

Sun Mar 27 02:47:12 CDT 2016

Trying to configure Asterisk 11 Cert with G722.1C. I have installed the
latest binary for Siren14:

srv-echo*CLI> siren14 show version
Digium Siren14 Module Version 11.0_1.0.5 (optimized for opteron_sse3_64)

According to this list post in 2012 Asterisk supports G.722.1 Annex C (also
known as Siren14), and this can be configured in a config file as either
'g7221c' or 'siren14':

http://lists.digium.com/pipermail/asterisk-users/2012-February/270218.html

However when setting allow=g7221c Asterisk will throw the following error:

[Mar 27 00:32:39] WARNING[1950]: frame.c:821 ast_parse_allow_disallow:
Cannot allow unknown format 'g7221c'
[Mar 27 00:32:39] WARNING[1950]: chan_sip.c:31786 reload_config: Codec
configuration errors found in line 9 : allow = g7221c

The setting for allow=siren14 does work. The issue is the Polycom VVX600
phones do not support Siren14, rather the G722.1C implementation. The
module was loaded properly as well:

[Mar 26 12:59:11] NOTICE[51170]: codec_siren14.c:1004 load_module: ITU
G.722.1 Annex C (Siren14, licensed from Polycom) transcoding module version
11.0_1.0.5 (This seems like a good start)
[Mar 26 12:59:11] NOTICE[51170]: codec_siren14.c:1005 load_module:
Copyright (C) 1999-2009 Digium, Inc.
[Mar 26 12:59:11] NOTICE[51170]: codec_siren14.c:1006 load_module: This
module is supplied under a commercial license granted by Digium, Inc.
[Mar 26 12:59:11] NOTICE[51170]: codec_siren14.c:1007 load_module: Please
see the full license text supplied in the accompanying
[Mar 26 12:59:11] NOTICE[51170]: codec_siren14.c:1008 load_module:
"LICENSE" file, or ask for a copy from Digium.
[Mar 26 12:59:11] NOTICE[51170]: codec_siren14.c:1009 load_module: This
product includes software from the Speex library. Please see
[Mar 26 12:59:11] NOTICE[51170]: codec_siren14.c:1010 load_module: the
accompanying "SPEEX_LICENSE" file for license information.
[Mar 26 12:59:11]   == Registered translator 'siren14tolin16' from format
siren14 to slin16, table cost, 960000, computational cost 14044
[Mar 26 12:59:11]   == Registered translator 'lin16tosiren14' from format
slin16 to siren14, table cost, 825000, computational cost 19581
[Mar 26 12:59:11]   == Registered translator 'siren14tolin8' from format
siren14 to slin, table cost, 960000, computational cost 18572
[Mar 26 12:59:11]   == Registered translator 'lin8tosiren14' from format
slin to siren14, table cost, 825000, computational cost 17958
[Mar 26 12:59:11]  Loaded codec_siren14.so => (ITU G.722.1 Annex C
(Siren14, licensed from Polycom) Encoder/Decoder (optimized for
opteron_sse3_64))

When trying to setup a call with just allow=siren14 the VVX600 would offer
this:

[Mar 26 13:12:03] --- (16 headers 14 lines) ---
[Mar 26 13:12:03] Sending to XX.XX.XX.XX:38447 (NAT)
[Mar 26 13:12:03] Using INVITE request as basis request -
53bbb6bb-1866e166-f at 10.10.10.75
[Mar 26 13:12:03] Found peer '0004F' for '0004F' from XX.XX.XX.XX:38447
[Mar 26 13:12:03]   == Using SIP RTP TOS bits 184
[Mar 26 13:12:03]   == Using SIP RTP CoS mark 5
[Mar 26 13:12:03] Found RTP audio format 9
[Mar 26 13:12:03] Found RTP audio format 0
[Mar 26 13:12:03] Found RTP audio format 8
[Mar 26 13:12:03] Found RTP audio format 18
[Mar 26 13:12:03] Found RTP audio format 127
[Mar 26 13:12:03] Found audio description format G722 for ID 9
[Mar 26 13:12:03] Found audio description format PCMU for ID 0
[Mar 26 13:12:03] Found audio description format PCMA for ID 8
[Mar 26 13:12:03] Found audio description format G729 for ID 18
[Mar 26 13:12:03] Found audio description format telephone-event for ID 127
[Mar 26 13:12:03] NOTICE[46737][C-00000bce]: chan_sip.c:10423 process_sdp:
No compatible codecs, not accepting this offer!

The Polycom RealPresence Trio 8800 however does support Siren14, and calls
do work:

[Mar 26 13:16:49] User-Agent: Polycom/5.4.1.17597
PolycomRealPresenceTrio-Trio_8800-UA/5.4.1.17597
[Mar 26 13:16:49] Allow-Events: conference,talk,hold
[Mar 26 13:16:49] Accept-Language: en
[Mar 26 13:16:49] Content-Type: application/sdp
[Mar 26 13:16:49] Content-Length: 247
[Mar 26 13:16:49]
[Mar 26 13:16:49] v=0
[Mar 26 13:16:49] o=- 1459020408 1459020408 IN IP4 10.241.125.120
[Mar 26 13:16:49] s=Polycom IP Phone
[Mar 26 13:16:49] c=IN IP4 10.241.125.120
[Mar 26 13:16:49] t=0 0
[Mar 26 13:16:49] a=sendrecv
[Mar 26 13:16:49] m=audio 2234 RTP/AVP 115 101
[Mar 26 13:16:49] a=rtpmap:115 G7221/32000
[Mar 26 13:16:49] a=fmtp:115 bitrate=48000
[Mar 26 13:16:49] a=rtpmap:101 telephone-event/8000
[Mar 26 13:16:49] a=sendrecv
[Mar 26 13:16:49] <------------->
[Mar 26 13:16:49] --- (14 headers 11 lines) ---
[Mar 26 13:16:49] Found RTP audio format 115
[Mar 26 13:16:49] Found RTP audio format 101
[Mar 26 13:16:49] Found audio description format G7221 for ID 115
[Mar 26 13:16:49] Found audio description format telephone-event for ID 101
[Mar 26 13:16:49] Capabilities: us - (ulaw|g729|g722|siren14), peer -
audio=(siren14)/video=(nothing)/text=(nothing), combined - (siren14)
[Mar 26 13:16:49] Non-codec capabilities (dtmf): us - 0x1
(telephone-event|), peer - 0x1 (telephone-event|), combined - 0x1
(telephone-event|)

Transcoding from G722 to Siren14 did also throw this error when using
jitterbuffer going to a VVX600:

[Mar 26 13:16:51] WARNING[51171][C-00000bc4]: abstract_jb.c:284 ast_jb_put:
SIP/0004F-000013bd received frame with invalid timing info:
has_timing_info=0, len=0, ts=0, src=lin16tog722

Any help would be appreciated.
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