[Sip] Canceling REFER

["Mark Eastman (meastman)" <meastman@cisco.com>]

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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