Hi List, We have a major issue while broadcasting DTMF using meetme application. We are sending DTMF to asterisk using SIP INFO message with duration 160.
INFO sip:xxx@xxx SIP/2.0 Via: SIP/2.0/UDP xxx:5060 From: <sip:xxx@xxx>;tag=43 To: <sip:xxx@xxx>;tag=9753.0207 Call-ID: xxx@xxx CSeq: 25634 INFO Content-Length: 26 Content-Type: application/dtmf-relay Signal= 2\r\n Duration= 160\r\n [Nov 19 15:30:43] [1;32mDEBUG[0m[2966]:[1;37mchan_sip.c[0m:[1;37m24896[0m [1;37mhandle_incoming[0m: **** Received INFO (13) - Command in SIP INFO Receiving INFO! * DTMF-relay event received: 2 [KCentos-2*CLI> [0K[Nov 19 15:30:43] [[1;32mDTMF[[0m[17988]: [[1;37mchannel.c[[0m:[[1;37m3978[[0m [[1;37m__ast_read[[0m: DTMF end '2' received on SIP/16222-00000037, duration 160 ms M[[KCentos-2*CLI> M[[0K[Nov 19 15:30:43] [[1;32mDTMF[[0m[17988]: [[1;37mchannel.c[[0m:[[1;37m4004[[0m [[1;37m__ast_read[[0m: DTMF begin emulation of '2' with duration 160 queued on SIP/16222-00000037 [Nov 19 15:30:45] [[1;32mDTMF[[0m[17988]: [[1;37mchannel.c[[0m:[[1;37m4096[[0m [[1;37m__ast_read[[0m: DTMF end emulation of '2' queued on SIP/16222-00000037 [Nov 19 15:30:45] [[1;32mDEBUG[[0m[17988]: [[1;37mchan_sip.c[[0m:[[1;37m3328[[0m [[1;37m__sip_xmit[[0m: Trying to put 'INFO sip:18' onto UDP socket destined for 132.186.230.236:6372 >From the above log (Nov 19 15:30:43 and Nov 19 15:30:45)I can see that after >receiving SIP INFO asterisk is trying to regenerate the DTMF tone based on the >duration specified by the client. Which is OK, but latency observed in this >operation is more than 2 Sec in some cases and also asterisk changes the >duration field in SIP INFO message body. Please help us out to overcome this >problem as more than 2 sec latency is not acceptable in real-time scenarios. >Also if possible let us know (technically), whether it is a know issue in >asterisk. Regards Rajib
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