[Freeswitch-users] INCOMPATIBLE_DESTINATION?

[Sergey Okhapkin]

I often see in FS log the following problem (bypass_media=true), SVN r16340:

SDP sent out to gateway (INVITE):

   v=0
   o=bandx-msw3 0 0 IN IP4 213.166.9.4
   s=sip call
   c=IN IP4 213.166.9.6
   t=0 0
   m=audio 56032 RTP/AVP 0 8 18
   a=rtpmap:18 G729/8000
   a=fmtp:18 annexb=yes
   a=silenceSupp:on - - - -


SDP response from gateway (183 Session Progress):

   v=0
   o=- 3473087019 3473087037 IN IP4 67.203.64.182
   s=-
   c=IN IP4 67.203.64.182
   t=0 0
   m=audio 14116 RTP/AVP 0
   a=sendrecv
   a=ptime:20
   a=rtpmap:0 PCMU/8000

Freeswitch hangs up the call with hangup cause INCOMPATIBLE_DESTINATION. Where 
is incompatibility? There is common codec 0.