As a test, offer PCMU first in order, then G729 last to see if the behavior of FreeSWITCH changes. Also, configure FreeSWITCH for late codec negotiation in the sip_profile. <param name="inbound-late-negotiation" value="true"/> Bote From: Rutu Patel Sent: Saturday, 26 December, 2015 00:10 Subject: Re: [Freeswitch-users] Codec Transcoding issue Hi Sergey, Thank you for reply. In sip profile 3 codecs are defined(G729,PCMU,PCMA) and device A offers G729. But freeswitch offers only G729 in INVITE. Please let me know if you want any other informations. -- Thanks, Rutu Patel iNextrix Technologies Pvt. Ltd. www.inextrix.com On Thu, Dec 24, 2015 at 9:35 PM, Sergey Safarov <s.safarov@gmail.com> wrote: Currently freeswitch offers only device A's codec(G729), but freeswitch should offer all 3 What codecs offers a-leg In first invite? On Thu, Dec 24, 2015, 19:03 Sergey Safarov <s.safarov@gmail.com> wrote: You has set 'disable-transcoding' 'true'. Thinking this prevents call establishment.