This could be the case - I will investigate further. I think I am only really interested in the Alert-info as part of the 180 Ringing message - I don't think my application will generate it in an INVITE method. Aren't there security concerns with supplying a URL from a Calling party to be played by a Called party ? I always thought DCR was more useful when linked to a caller ID such that a different 'tone' was played depending on the calling party ?
Thanks John -----Original Message----- From: Troy Cauble [mailto:[EMAIL PROTECTED] Sent: Thursday, November 18, 2004 1:25 PM To: [EMAIL PROTECTED]; Wainwright, John Subject: Re: [Sip-implementors] Distinctive Call ringing. "Wainwright, John" <[EMAIL PROTECTED]> wrote: > Does anyone have any experience with Distinctive Call Ringing using > SIP ? > > As far as I can make out this is achieved using the ALERT-Info header > which seems to take a URL as a parameter to indicate what ringing > 'tone' to play. I thought I came across a Cisco implementation that > used an integer field instead of the URL. > > Any insights ? > > Thanks > John Alert-Info: and the use of an URL are standard. I've seen more than one system use this form Alert-Info: <http://127.0.0.1/Bellcore-dr3> to indicate a DR, but I don't think it's a standard. (Google will turn up some examples.) Just guessing, but maybe the implementation you remember took a integer field at configuration time, then generated something like the above from it. -troy _______________________________________________ Sip-implementors mailing list [EMAIL PROTECTED] http://lists.cs.columbia.edu/mailman/listinfo/sip-implementors
