>>INFO is more appropriate to send DTMF using "application/dtmf-relay" >>content-type. That is a matter of opinion - some would say that DTMF should be solicited before it is sent. I guess though in this case, the NOTIFY is unsolicited anyway. It is unusual for unsolicited NOTIFY to be used for DTMF (though I have seen unsolicited NOTIFY for call-waiting) I do agree that INFO is more usual for unsolicited DTMF transport. >> Please note that this is not IANA registered application mime type though.
True. "application/dtmf-relay" is what Cisco have used, so many others have also adopted it. If a big player uses something non-standard, it can end up becoming a kind of de-facto standard. Regards, Attila ________________________________ From: [EMAIL PROTECTED] on behalf of Vikram Chhibber Sent: Thu 02/10/2008 10:19 To: Vivek Gupta Cc: sip-implementors@lists.cs.columbia.edu Subject: Re: [Sip-implementors] sending DTMF as Notify INFO is more appropriate to send DTMF using "application/dtmf-relay" content-type. Please note that this is not IANA registered application mime type though. For example: INFO sip:[EMAIL PROTECTED] <[EMAIL PROTECTED]> SIP/2.0 Via: SIP/2.0/UDP 172.80.2.100:5060 From: <sip:[EMAIL PROTECTED] <[EMAIL PROTECTED]>>;tag=43 To: <sip:[EMAIL PROTECTED] <[EMAIL PROTECTED]> >;tag=9753.0207 Call-ID: [EMAIL PROTECTED] CSeq: 25634 INFO Content-Length: 26 Content-Type: application/dtmf-relay Signal= 1 Duration= 160 On Thu, Oct 2, 2008 at 1:44 PM, Vivek Gupta <[EMAIL PROTECTED]>wrote: > Hi, > > I need information on how to send DTMF tones as unsolicited Notify method > within an established dialogue. Can anyone explain the > steps to implement the same? > > Information on any SIP soft-phone that supports DTMF as Notify would be of > great of help? > > With regards, > Vivek GUpta > _______________________________________________ > Sip-implementors mailing list > Sip-implementors@lists.cs.columbia.edu > https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors > _______________________________________________ Sip-implementors mailing list Sip-implementors@lists.cs.columbia.edu https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors _______________________________________________ Sip-implementors mailing list Sip-implementors@lists.cs.columbia.edu https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors
