[Freeswitch-users] Cisco media gateway and DTMF

Wed Jan 13 12:12:14 PST 2010

Thanks for your reply, 

Wireshark shows all of the digits coming through cleanly, in the case below (also on pastebin) its 0951*72789, freeswitch does not seem to be processing one or more of the rtp events. Is there some specific debugging I should turn on that might give me some more info on why freeswitch is not processing some of these events? 

http://pastebin.freeswitch.org/11780 

449 12.280148 192.168.3.21 192.168.6.130 RTP EVENT Payload type=RTP Event, DTMF Zero 0 
450 12.285108 192.168.3.21 192.168.6.130 RTP EVENT Payload type=RTP Event, DTMF Zero 0 
451 12.290082 192.168.3.21 192.168.6.130 RTP EVENT Payload type=RTP Event, DTMF Zero 0 
452 12.335129 192.168.3.21 192.168.6.130 RTP EVENT Payload type=RTP Event, DTMF Zero 0 (end) 
453 12.340124 192.168.3.21 192.168.6.130 RTP EVENT Payload type=RTP Event, DTMF Zero 0 (end) 
454 12.345124 192.168.3.21 192.168.6.130 RTP EVENT Payload type=RTP Event, DTMF Zero 0 (end) 
455 12.365162 192.168.3.21 192.168.6.130 RTP PT=ITU-T G.711 PCMU, SSRC=0x1D050315, Seq=21862, Time=359229277, Mark 
456 12.380167 192.168.3.21 192.168.6.130 RTP PT=ITU-T G.711 PCMU, SSRC=0x1D050315, Seq=21863, Time=359229605 
461 12.385248 192.168.3.21 192.168.6.130 RTP EVENT Payload type=RTP Event, DTMF Nine 9 
462 12.385253 192.168.3.21 192.168.6.130 RTP EVENT Payload type=RTP Event, DTMF Nine 9 
465 12.390163 192.168.3.21 192.168.6.130 RTP EVENT Payload type=RTP Event, DTMF Nine 9 
466 12.435211 192.168.3.21 192.168.6.130 RTP EVENT Payload type=RTP Event, DTMF Nine 9 (end) 
467 12.440201 192.168.3.21 192.168.6.130 RTP EVENT Payload type=RTP Event, DTMF Nine 9 (end) 
468 12.445205 192.168.3.21 192.168.6.130 RTP EVENT Payload type=RTP Event, DTMF Nine 9 (end) 
469 12.480251 192.168.3.21 192.168.6.130 RTP PT=ITU-T G.711 PCMU, SSRC=0x1D050315, Seq=21870, Time=359230405 
470 12.485275 192.168.3.21 192.168.6.130 RTP EVENT Payload type=RTP Event, DTMF Five 5 
471 12.485284 192.168.3.21 192.168.6.130 RTP EVENT Payload type=RTP Event, DTMF Five 5 
472 12.490251 192.168.3.21 192.168.6.130 RTP EVENT Payload type=RTP Event, DTMF Five 5 
475 12.535277 192.168.3.21 192.168.6.130 RTP EVENT Payload type=RTP Event, DTMF Five 5 (end) 
476 12.540287 192.168.3.21 192.168.6.130 RTP EVENT Payload type=RTP Event, DTMF Five 5 (end) 
477 12.545287 192.168.3.21 192.168.6.130 RTP EVENT Payload type=RTP Event, DTMF Five 5 (end) 
478 12.580337 192.168.3.21 192.168.6.130 RTP PT=ITU-T G.711 PCMU, SSRC=0x1D050315, Seq=21877, Time=359231197 
484 12.585337 192.168.3.21 192.168.6.130 RTP EVENT Payload type=RTP Event, DTMF One 1 
485 12.585343 192.168.3.21 192.168.6.130 RTP EVENT Payload type=RTP Event, DTMF One 1 
486 12.590362 192.168.3.21 192.168.6.130 RTP EVENT Payload type=RTP Event, DTMF One 1 
492 12.635393 192.168.3.21 192.168.6.130 RTP EVENT Payload type=RTP Event, DTMF One 1 (end) 
493 12.640368 192.168.3.21 192.168.6.130 RTP EVENT Payload type=RTP Event, DTMF One 1 (end) 
494 12.645369 192.168.3.21 192.168.6.130 RTP EVENT Payload type=RTP Event, DTMF One 1 (end) 
495 12.665406 192.168.3.21 192.168.6.130 RTP PT=ITU-T G.711 PCMU, SSRC=0x1D050315, Seq=21884, Time=359231677, Mark 
496 12.680431 192.168.3.21 192.168.6.130 RTP PT=ITU-T G.711 PCMU, SSRC=0x1D050315, Seq=21885, Time=359232005 
497 12.680438 192.168.3.21 192.168.6.130 RTP EVENT Payload type=RTP Event, DTMF Star * 
502 12.685408 192.168.3.21 192.168.6.130 RTP EVENT Payload type=RTP Event, DTMF Star * 
506 12.690412 192.168.3.21 192.168.6.130 RTP EVENT Payload type=RTP Event, DTMF Star * 
507 12.735450 192.168.3.21 192.168.6.130 RTP EVENT Payload type=RTP Event, DTMF Star * (end) 
508 12.740453 192.168.3.21 192.168.6.130 RTP EVENT Payload type=RTP Event, DTMF Star * (end) 
509 12.745469 192.168.3.21 192.168.6.130 RTP EVENT Payload type=RTP Event, DTMF Star * (end) 
511 12.780526 192.168.3.21 192.168.6.130 RTP PT=ITU-T G.711 PCMU, SSRC=0x1D050315, Seq=21892, Time=359232805 
512 12.780534 192.168.3.21 192.168.6.130 RTP EVENT Payload type=RTP Event, DTMF Seven 7 
513 12.785502 192.168.3.21 192.168.6.130 RTP EVENT Payload type=RTP Event, DTMF Seven 7 
514 12.790492 192.168.3.21 192.168.6.130 RTP EVENT Payload type=RTP Event, DTMF Seven 7 
515 12.835544 192.168.3.21 192.168.6.130 RTP EVENT Payload type=RTP Event, DTMF Seven 7 (end) 
516 12.840537 192.168.3.21 192.168.6.130 RTP EVENT Payload type=RTP Event, DTMF Seven 7 (end) 
517 12.845537 192.168.3.21 192.168.6.130 RTP EVENT Payload type=RTP Event, DTMF Seven 7 (end) 
523 12.880582 192.168.3.21 192.168.6.130 RTP PT=ITU-T G.711 PCMU, SSRC=0x1D050315, Seq=21899, Time=359233605 
524 12.885593 192.168.3.21 192.168.6.130 RTP EVENT Payload type=RTP Event, DTMF Two 2 
525 12.885599 192.168.3.21 192.168.6.130 RTP EVENT Payload type=RTP Event, DTMF Two 2 
526 12.890580 192.168.3.21 192.168.6.130 RTP EVENT Payload type=RTP Event, DTMF Two 2 
528 12.935618 192.168.3.21 192.168.6.130 RTP EVENT Payload type=RTP Event, DTMF Two 2 (end) 
529 12.940618 192.168.3.21 192.168.6.130 RTP EVENT Payload type=RTP Event, DTMF Two 2 (end) 
530 12.945618 192.168.3.21 192.168.6.130 RTP EVENT Payload type=RTP Event, DTMF Two 2 (end) 
531 12.965656 192.168.3.21 192.168.6.130 RTP PT=ITU-T G.711 PCMU, SSRC=0x1D050315, Seq=21906, Time=359234077, Mark 
532 12.980659 192.168.3.21 192.168.6.130 RTP PT=ITU-T G.711 PCMU, SSRC=0x1D050315, Seq=21907, Time=359234413 
538 12.985690 192.168.3.21 192.168.6.130 RTP EVENT Payload type=RTP Event, DTMF Seven 7 
539 12.985695 192.168.3.21 192.168.6.130 RTP EVENT Payload type=RTP Event, DTMF Seven 7 
540 12.990657 192.168.3.21 192.168.6.130 RTP EVENT Payload type=RTP Event, DTMF Seven 7 
541 13.035703 192.168.3.21 192.168.6.130 RTP EVENT Payload type=RTP Event, DTMF Seven 7 (end) 
542 13.040701 192.168.3.21 192.168.6.130 RTP EVENT Payload type=RTP Event, DTMF Seven 7 (end) 
543 13.045700 192.168.3.21 192.168.6.130 RTP EVENT Payload type=RTP Event, DTMF Seven 7 (end) 
544 13.080762 192.168.3.21 192.168.6.130 RTP PT=ITU-T G.711 PCMU, SSRC=0x1D050315, Seq=21914, Time=359235205 
545 13.080768 192.168.3.21 192.168.6.130 RTP EVENT Payload type=RTP Event, DTMF Eight 8 
546 13.085736 192.168.3.21 192.168.6.130 RTP EVENT Payload type=RTP Event, DTMF Eight 8 
547 13.090798 192.168.3.21 192.168.6.130 RTP EVENT Payload type=RTP Event, DTMF Eight 8 
549 13.135809 192.168.3.21 192.168.6.130 RTP EVENT Payload type=RTP Event, DTMF Eight 8 (end) 
550 13.140780 192.168.3.21 192.168.6.130 RTP EVENT Payload type=RTP Event, DTMF Eight 8 (end) 
551 13.145793 192.168.3.21 192.168.6.130 RTP EVENT Payload type=RTP Event, DTMF Eight 8 (end) 
554 13.180827 192.168.3.21 192.168.6.130 RTP PT=ITU-T G.711 PCMU, SSRC=0x1D050315, Seq=21921, Time=359236005 
558 13.185847 192.168.3.21 192.168.6.130 RTP EVENT Payload type=RTP Event, DTMF Nine 9 
559 13.185854 192.168.3.21 192.168.6.130 RTP EVENT Payload type=RTP Event, DTMF Nine 9 
560 13.190821 192.168.3.21 192.168.6.130 RTP EVENT Payload type=RTP Event, DTMF Nine 9 
566 13.235872 192.168.3.21 192.168.6.130 RTP EVENT Payload type=RTP Event, DTMF Nine 9 (end) 
567 13.240864 192.168.3.21 192.168.6.130 RTP EVENT Payload type=RTP Event, DTMF Nine 9 (end) 
568 13.245872 192.168.3.21 192.168.6.130 RTP EVENT Payload type=RTP Event, DTMF Nine 9 (end) ----- Original Message ----- 
From: "Brian West" <brian at freeswitch.org> 
To: freeswitch-users at lists.freeswitch.org 
Sent: Wednesday, January 13, 2010 12:39:52 PM 
Subject: Re: [Freeswitch-users] Cisco media gateway and DTMF 

Cisco gateways can detect DTMF at random if you have kids screaming or loud noises in the background... very unreliable. 

/b 

On Jan 13, 2010, at 1:36 PM, Dan wrote: 

Sorry, I should have made that more clear, this is using 2833. As I mentioned tcpdump shows all the digits coming through as DTMF events on the RTP stream (and all the correct DTMF digits are coming through). 

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