[Freeswitch-users] Invalid codec CN is tearing down the call request

[Maciej Bylica]

Hello,

I am running FreeSWITCH Version
1.5.14b+git~20140917T231120Z~8f85b5204c~64bit, proxy media mode and heaving
problem with some call requests setup.
Here is one of them:

2014-12-11 13:38:15.034612 [NOTICE] switch_channel.c:1055 New Channel
sofia/outside_1/20049112223344 []
2014-12-11 13:38:15.034612 [DEBUG] mod_sofia.c:4579
(sofia/outside_1/20049112223344) State Change CS_NEW -> CS_INIT
2014-12-11 13:38:15.034612 [DEBUG] switch_core_session.c:1388 Send signal
sofia/outside_1/20049112223344 [BREAK]
2014-12-11 13:38:15.054610 [DEBUG] switch_core_state_machine.c:472
(sofia/outside_1/20049112223344) Running State Change CS_INIT
2014-12-11 13:38:15.054610 [DEBUG] switch_core_state_machine.c:512
(sofia/outside_1/20049112223344) State INIT
2014-12-11 13:38:15.054610 [DEBUG] mod_sofia.c:87
sofia/outside_1/20049112223344 SOFIA INIT
2014-12-11 13:38:15.054610 [DEBUG] switch_core_media.c:7510
sofia/outside_1/20049112223344 Patched SDP
 ---
 v=0
 o=CiscoSystemsSIP-GW-UserAgent 6016 7716 IN IP4 10.10.10.226
 s=SIP Call
 c=IN IP4 10.10.10.12
 t=0 0
 m=audio 24782 RTP/AVP 18 19
 c=IN IP4 10.10.10.12
 a=rtpmap:18 G729/8000
 a=fmtp:18 annexb=yes
 a=rtpmap:19 CN/8000

 +++
 v=0
 o=FreeSWITCH 0255539876 0255539877 IN IP4 10.10.10.166
 s=FreeSWITCH
 c=IN IP4 10.10.10.166
 t=0 0
 m=audio 19690 RTP/AVP 18 19
 c=IN IP4 10.10.10.166
 a=rtpmap:18 G729/8000
 a=fmtp:18 annexb=yes
 a=rtpmap:19 CN/8000

 2014-12-11 13:38:15.054610 [DEBUG] sofia_glue.c:1228
sofia/outside_1/20049112223344 sending invite version: 1.5.14b git 8f85b52
2014-09-17 23:11:20Z 64bit
 Local SDP:
 v=0
 o=FreeSWITCH 0255539876 0255539877 IN IP4 10.10.10.166
 s=FreeSWITCH
 c=IN IP4 10.10.10.166
 t=0 0
 m=audio 19690 RTP/AVP 18 19
 c=IN IP4 10.10.10.166
 a=rtpmap:18 G729/8000
 a=fmtp:18 annexb=yes
 a=rtpmap:19 CN/8000

sending out SDP exactly as shown above.
The other side is responsing with 100, then 180 Ringing wo/SDP then 183
w/SDP

 2014-12-11 14:29:12.214608 [DEBUG] sofia.c:6423 Channel
sofia/outside_1/20049112223344 entering state [proceeding][183]
 2014-12-11 14:29:12.214608 [DEBUG] sofia.c:6433 Remote SDP:
 v=0
 o=Dialogic_SDP 11471558 0 IN IP4 10.10.10.218
 s=Dialogic-SIP
 c=IN IP4 10.10.10.198
 t=0 0
 m=audio 10024 RTP/AVP 19 18
 a=rtpmap:19 CN/8000
 a=rtpmap:18 G729/8000
 a=fmtp:18 annexb=yes
 a=silenceSupp:off - - - -
 a=ptime:20

 2014-12-11 14:29:12.214608 [DEBUG] switch_core_media.c:7510
sofia/outside_1/20049112223344 Patched SDP
 ---
 v=0
 o=FreeSWITCH 0351957506 0351957507 IN IP4 10.10.10.166
 s=FreeSWITCH
 c=IN IP4 10.10.10.166
 t=0 0
 m=audio 29492 RTP/AVP 18 19
 c=IN IP4 10.10.10.166
 a=rtpmap:18 G729/8000
 a=fmtp:18 annexb=yes
 a=rtpmap:19 CN/8000

 +++
 v=0
 o=FreeSWITCH 0351957506 0351957508 IN IP4 10.10.10.166
 s=FreeSWITCH
 c=IN IP4 10.10.10.166
 t=0 0
 m=audio 29492 RTP/AVP 18 19
 c=IN IP4 10.10.10.166
 a=rtpmap:18 G729/8000
 a=fmtp:18 annexb=yes
 a=rtpmap:19 CN/8000

2014-12-11 14:29:12.214608 [ERR] switch_core_codec.c:651 *Invalid codec CN!*
2014-12-11 14:29:12.214608 [ERR] switch_core_media.c:2294 *Can't load
codec?*
2014-12-11 14:29:12.214608 [NOTICE] switch_core_media.c:2295 Hangup
sofia/outside_1/20049112223344 [CS_CONSUME_MEDIA] [INCOMPATIBLE_DESTINATION]
2014-12-11 14:29:12.214608 [DEBUG] switch_channel.c:3222 Send signal
sofia/outside_1/20049112223344 [KILL]

and Freeswitch is terminating the call by using CANCEL.

My modules.conf.xml config part looks like following:
    <!-- Codec Interfaces -->
    <load module="mod_spandsp"/>
    <load module="mod_g723_1"/>
    <load module="mod_g729"/>
    <!--load module="mod_amr"/-->
    <!--<load module="mod_ilbc"/>-->
    <load module="mod_h26x"/>
    <!--load module="mod_vp8"/-->
    <!--load module="mod_b64"/-->
    <!--<load module="mod_siren"/>-->
    <!--<load module="mod_isac"/>-->
    <!--<load module="mod_celt"/>-->
    <!--load module="mod_opus"/-->

Is it a problem with CN definition?
Could you please lead me where the problem is located?

Thanks in advance.
Mac.
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