Dear, Huawei softx3000 sends the dtmf with undefined content-type(sscc) and format, so the asterisk can not recognize the digits, maybe changing the source code of asterisk be a good solution, but I am looking for a better way. would you please let me know if you have a better solution. Best <--- SIP read from UDP:1.1.1.1:5060 ---> INFO sip:050111111 at 213.203.201.51:5060 SIP/2.0 Via: SIP/2.0/UDP 1.1.1.1:5060;branch=z9hG4bK2d421b56a6bf8d240ecb4592d Call-ID: SBCb0l9t89ql920b0y1rsps2gsr8sy9ggl0 at SoftX3000 From: <sip:2188713865 at 1.1.1.1;user=phone>;tag=srtysnby-CC-23 To: <sip:020111111 at 2.2.2.2;user=phone>;tag=as12188ab0 CSeq: 2 INFO Max-Forwards: 70 Content-Length: 9 Content-Type: application/sscc digit=1 <-------------> --- (9 headers 1 lines) --- Receiving INFO! [Sep 3 09:02:20] WARNING[20592]: chan_sip.c:19626 handle_request_info: Unable to parse INFO message from SBCb0l9t89ql920b0y1rsps2gsr8sy9ggl0 at SoftX3000. Content -- Pezhman Lali -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.digium.com/pipermail/asterisk-users/attachments/20120903/9facf7aa/attachment.htm>