Alan,

See bug below in my wording:

> 
> In flow 2.5 of the Service Examples I-D, if you send the REFER (F14)
> from B to A,
> how does A  let C know not to ring the phone and to drop the connection
> to B?  I
> couldn't see how to do this cleanly,  which is why the REFER goes in the
> other
> direction, from B to C, which then allows the resulting session to
> replace the
> session between A and B.
 
If B sends to A a REFER Refer-to C then A accepts (202) then A sends to C INVITE 
Referred-by B : it is the same thing than in your example. then :
C accepts, A sends a BYE to B  , C sends a notify to B and B sends a BYE to C.

A always terminates the communcation to B and C always notifies B that the 
transfer succeed.

Oooops : A always notifies B that the transfer succeed and A always terminates 
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