Ah.... Good point. Hadn't tought of that. In any case, I'm not sure voicemail is the best example. Seems to me you are more likely to use RFC 2833 for voicemail, since it's a media server. Furthermore, you'll for sure be dealing with people leaving voicemails that are NOT SIP users and would be going through a generic PSTN-SIP gateway (which would do RFC 2833).
I'd think that KPML is more useful for features that don't terminate media, like the Calling card example, or *gasp* invocation of feature codes, and where the end-user device is known to be a SIP phone. > -----Original Message----- > From: Hadriel Kaplan [mailto:[EMAIL PROTECTED] > Sent: Monday, September 10, 2007 12:42 > To: Audet, Francois (SC100:3055); Stucker, Brian > (RICH1:AR00); 'Eric Burger' > Cc: 'sip' > Subject: RE: [Sip] INFO > > But most calls to a voicemail server DON'T actually use DTMF, > I've been told > - since most calls to a vmail server are to leave messages. > Calls to retrieve voicemail do always use dtmf, but calls to > leave voicemail don't. > However calls to leave voicemail usually have the optional > ability for the caller to send DTMF - for example pressing > "*" and then the passcode to retrieve voicemail, or "0" to > reach an attendant, or some button to cancel the recording, > etc. Only a fraction of those calls actually end up with > someone pressing a dtmf button, but because you *could* press > dtmf, the vmail server would have to KPML subscribe for all calls. _______________________________________________ Sip mailing list https://www1.ietf.org/mailman/listinfo/sip This list is for NEW development of the core SIP Protocol Use [EMAIL PROTECTED] for questions on current sip Use [EMAIL PROTECTED] for new developments on the application of sip
