Re: [Sip] Canceling REFER

[Robert Sparks <rsparks@dynamicsoft.com>]

>From RFC3515:

   Terminating a subscription,
   either by explicitly unsubscribing or rejecting NOTIFY, is not an
   indication that the referenced request should be withdrawn or
   abandoned.  In particular, an agent acting on a REFER request SHOULD
   NOT issue a CANCEL to any referenced SIP requests because the agent
   sending the REFER terminated its subscription to the refer event
   before the referenced request completes.

RjS

On Fri, 2003-09-05 at 08:21, Tolga Asveren wrote:
> What about sending SUBSCRIBE with Expires=0 , as described in RFC3265.
> Afterall RFC3515 states also in 2.4.4 that for unsubscribing, the procedure
> described in RFC3265 is valid.
> 
>    Tolga
> --- "Mark Eastman (meastman)" <meastman@cisco.com> wrote:
> > Hello,
> >
> > I have a question about how to deal with canceling a
> > REFER.  Let's say I
> > REFER Bob to Betty, but then decide I want to REFER
> > Bob to someone else
> > before the transfer is complete.  Are there existing
> > call flows describing
> > such behavior?  I know the REFER rfc states handling
> > multiple refers is
> > valid, but is that how one would handle this
> > situation (Sending a new REFER
> > with either a new target or perhaps method=CANCEL).
> > If so, call flows
> > describing such behavior would be nice.
> >
> > Thanks,
> > Mark
> >
> >
> > _______________________________________________
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> > Protocol
> > Use sip-implementors@cs.columbia.edu for questions
> > on current sip
> > Use sipping@ietf.org for new developments on the
> > application of sip
> 
> 
> _______________________________________________
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> This list is for NEW development of the core SIP Protocol
> Use sip-implementors@cs.columbia.edu for questions on current sip
> Use sipping@ietf.org for new developments on the application of sip


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