You can add an Alert-Info header from B-C 18X msg with a distinctive ring cadence, provided the tone is a std. one and C is capable of playing it.
> > I am trying to understand how call waiting is done in SIP. > > Assume the following scenario: > > A and B are already involved in a call. > C calls B, and B has call waiting. > B's phone supports call waiting and notifies B of the incoming call > from C. > > My question is the following: Will C get any indication that the call > to B is a call waiting call? > > Or, in other words, is there any standard way in SIP to indicate in > the backwards direction (from B to C) that the call is a call waiting > call? > If there is no "standard" way, is there a "de facto standard" > convention that is used? > > Thanks. > > Mike > > > _______________________________________________ > Sip-implementors mailing list > [email protected] > http://lists.cs.columbia.edu/mailman/listinfo/sip-implementors > _______________________________________________ Sip-implementors mailing list [email protected] http://lists.cs.columbia.edu/mailman/listinfo/sip-implementors
