Sorry Brian, this time i couldn't get you completely, and code was downloaded in Dec 2011, i wrote 2012 (my mistake). If this is really a phone issue, the same code must not work with the old FreeSwitch version and same phone. A day before, I tried with old FreeSwitch, it worked efficiently. Still i will try to go with your seggestion, so that i may find some way to solve this problem. Thanks for your suggestion and get well soon. ----- Original Message ----- From: "Brian West" <brian@freeswitch.org> To: "FreeSWITCH Users Help" <freeswitch-users@lists.freeswitch.org> Sent: Thursday, February 16, 2012 7:18:23 PM Subject: Re: [Freeswitch-users] stop sip_info This is your phones fault. Notice in the SDP it doesn't negotiate telephoney-event so we have nothing to clue us in on that it does 2833 or info. So in reality you should go beat the creator of this phone to death for not doing something about this. (btw info draft expired and IS NOT a standard). BUT you can relax now.. set the sofia profile option 'liberal-dtmf' to true.... NEXT!!! /b PS: BKW-1 updated with latest info. On Feb 16, 2012, at 6:11 AM, Piyush Sharma wrote: Thanks for Response Michael, This is the capture of wireshark INVITE sip:3333@192.168.4.18:5060 SIP/2.0 Via: SIP/2.0/UDP 192.168.4.244:5065;branch=z9hG4bK9268238112493813801;rport From: 30000 < sip:30000@192.168.4.18:5060 >;tag=1653316119 To: "3333" < sip:3333@192.168.4.18:5060 > Call-ID: 188371401128256-63249236018@192.168.4.244 CSeq: 1 INVITE Contact: < sip:30000@192.168.4.244:5065 > Max-Forwards: 70 Supported: replaces, join, path User-Agent: Voip Phone 1.0 Allow: INVITE, ACK, OPTIONS, BYE, CANCEL, REFER, NOTIFY, INFO, PRACK, UPDATE, MESSAGE Content-Type: application/sdp Content-Length: 185 v=0 o=30000 24630637 15149730 IN IP4 192.168.4.244 s=A conversation c=IN IP4 192.168.4.244 t=0 0 m=audio 10006 RTP/AVP 8 0 a=rtpmap:8 PCMA/8000 a=rtpmap:0 PCMU/8000 a=sendrecv -- Brian West FreeSWITCH Solutions, LLC Phone: +1 (918) 420-9266 Fax: +1 (918) 420-9267 brian@freeswitch.org http://www.freeswitch.org