Ah! This means that my advice was wrong. This section of Confluence tells you more: https://freeswitch.org/confluence/display/FREESWITCH/Codec+Negotiation#Codec...) Bote From: Anthony Minessale Sent: Saturday, 26 December, 2015 15:20 Subject: Re: [Freeswitch-users] Codec Transcoding issue add {media_mix_inbound_outbound_codecs=true} to outbound leg or set media_mix_inbound_outbound_codecs=true in vars.xml to make it global. On Sat, Dec 26, 2015 at 2:16 PM, Sergey Safarov <s.safarov@gmail.com> wrote: Set 'disable-transcoding' to 'false' and repeat again Sergey On Sat, Dec 26, 2015 at 8:09 AM, Rutu Patel <rutu.patel@inextrix.com> wrote: 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?