[OpenSER-Users] [OT] DMTF question (rfc2833)

Hi, This is offtopic, but maybe someone could help me. I have a problem with a costumer sending the DTMF via RTPEvent. They are sending just one packet per event, with the END bit set and the duration of the event, but some carriers are no recognizing this Event, only if you keep sending rtp events with the duration and then send a final event with the END bit set. This is valid, to send just one event with duration and END bit??? No. Time Source Destination Protocol Info 3 0.026233 xxx.xx.xxx.xx yyy.y.yyy.y RTP EVENT Payload type=RTP Event, DTMF Two 2 (end) Frame 3 (62 bytes on wire, 62 bytes captured) Internet Protocol, Src: xxx.xx.xxx.xx (xxx.xx.xxx.xx), Dst: yyy.y.yyy.y (yyy.y.yyy.y) User Datagram Protocol, Src Port: pxc-spvr (4006), Dst Port: 13018 (13018) Real-Time Transport Protocol 10.. .... = Version: RFC 1889 Version (2) ..0. .... = Padding: False ...0 .... = Extension: False .... 0000 = Contributing source identifiers count: 0 0... .... = Marker: False Payload type: Unknown (101) Sequence number: 51289 Timestamp: 1479952026 Synchronization Source identifier: 0x43256a7a (1126525562) RFC 2833 RTP Event Event ID: DTMF Two 2 (2) 1... .... = End of Event: True .0.. .... = Reserved: False ..00 0000 = Volume: 0 Event Duration: 1200 Thanks. -- Lucio Maciel <lucio(a)tesatelecom.com>