Subject: [Sip] draft-ietf-sip-cc-transfer-05

From: Sarvi Shanmugham <[email-masked]>
Date: Tue, 25 Sep 2001 09:56:54 -0700

I have a question/concern in the blind transfer case.

As per the current spec,
    The TRANSFEREE responds with a Ack 202 to the REFER method, before
the attempt to the Transfer target is initiated.

    The next possible message from the Transferee to the Transferor is
NOTIFY(200 OK) and this is when the Transfer target accepts(picks up the
phone).

     In a blind transfer, where I want to release the Transferor, Ack202
"may be" premature, and NOTIFY(200 OK) may be too late.

     Can the Transferee gateway, send an intermediate NOTIFY(180 OK)
when the transfer target is "ringing". This could be a more reliable
place to release the Transferee's line, than Ack 202

Any thoughts,
Sarvi