Hi Mike,
100rel has nothing to do with DTMF. 100rel stands for "Reliability of Provisional Responses in the Session Initiation Protocol (SIP)" see: http://www.ietf.org/rfc/rfc3262.txt rfc2833 is the right way of sending DTMF digits over rtp and that option seems to be enabled for both phones. Try to capture the rtp traffic for a problematic call and open it with wireshark. Wireshark will display all the digits that are sent between phones. By analyzing the rtp traffic you will be able to debug your problem. Regards, Ovidiu Sas On 7/19/07, Mike Ashton <[EMAIL PROTECTED]> wrote:
Hi all, I'm having some strange DTMF behavior and wondering if someone can shed some light on it. I'm dialing out and sending DTMF after the call is established, and this usually works just find. But occasionally it fails from a sipura 2002 and PAP2, but works from my Polycom 501. Now looking at the channels when set up the only difference I can see, is that the Polycom has a SIP Option set. Polycom: Format ulaw DTMF Mode: rfc2833 SIP Options: 100rel Spa Format ulaw DTMF Mode: rfc2833 SIP Options: (none) Can some one explain what the 100rel is and how do I get the SPA to invoke it if possible. I Googled this and came up empty. Thanks, Mike -- Mike Ashton Quality Track Intl Ph: 647-722-2092 x 301 Cell: 416-527-4995 Fax: 416-352-6043 QTI CONFIDENTIAL AND PROPRIETARY INFORMATION The contents of this material are confidential and proprietary to Quality Track International, Inc. and may not be reproduced, disclosed, distributed or used without the express permission of an authorized representative of QTI. Use for any purpose or in any manner other than that expressly authorized is prohibited. If you have received this communication in error, please immediately delete it and all copies, and promptly notify the sender. --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
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