inline.. Manpreet Singh <[EMAIL PROTECTED]> wrote: Hi
How is the support for SIP INFO negotiated between 2 UACs? The initial INVITE carries the Allow and Call-Info headers? Is that all what is needed to Offer the support for INFO? [Rama] INFO is used to send DTMF on the signaling path, once you have a established media session between 2 UA's. I guess [ABN] has replied as to what is needed to support INFO Also what exact syntax is used for negotiating INFO for out of band DTMF? The actual payload carried for the INFO is the telephony-events? [Rama] The syntax of INFO is as below...for DTMF signals to be sent.. INFO sip:[EMAIL PROTECTED] SIP/2.0 Via: SIP/2.0/UDP 172.80.2.100:5060 From: <sip:[EMAIL PROTECTED]>;tag=43 To: <sip:[EMAIL PROTECTED]>;tag=9753.0207 Call-ID: [EMAIL PROTECTED] CSeq: 25634 INFO Supported: 100rel Supported: timer Content-Length: 26 Content-Type: application/dtmf-relay Signal= 1 Duration= 160 The above means that signal=1 is the DTMF to be applied for a duration of 160ms. The min value is 100ms, max =5000ms and default is 250ms A call example with an actual message exchange would be truely appreciated. [Rama] Once u have an established media session (typical call path) then INFO is sent across with the relevant DTMF signal for the relevant time duration as would be mentioned in the duration field. Thanks Manpreet _______________________________________________ Sip-implementors mailing list [email protected] https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors --------------------------------- Sneak preview the all-new Yahoo.com. It's not radically different. Just radically better. --------------------------------- Yahoo! Messenger with Voice. PC-to-Phone calls for ridiculously low rates. _______________________________________________ Sip-implementors mailing list [email protected] https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors
