Your phone is not offering any codecs in the INVITE: m=audio 15696 RTP/AVP 19 The only payload type listed is 19 (comfort noise) - there are no codecs listed. -Steve On 20 June 2013 22:38, Sayyed Mohammad Emami Razavi <emamirazavi@gmail.com>wrote:

When i call destination 5000 with my registered phone via 3cx for ivr demo, my session hangs up(incompatible destination) suddenly and no sound heard from phone! anybody knows the solution? FS log is here: http://pastebin.freeswitch.org/21084 all configs is default FS configurations. i have just changed these lines in vars.xml: <X-PRE-PROCESS cmd="set" data="global_codec_prefs=G729,G722,PCMU,PCMA,GSM"/> <X-PRE-PROCESS cmd="set" data="outbound_codec_prefs=G729,PCMU,PCMA,GSM"/>

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