"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
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