Subject: [Sip] Call forwarding feature support

From: "Frank W. Miller" <[email-masked]>
Date: Mon, 2 Jul 2001 15:13:14 -0400

I posted this on the bell-labs list this morning
but have been advised to move to the ietf list 
instead.

I have a question having to do with call forwarding.
Lets say we have a call that arrives at a SIP user
agent and call forwarding is active at that user
agent.  Further, lets assume that part of the call
is carried over the PSTN.

There are two possibilities, 1) the call is forwarded
to another SIP location, and 2) the call is forwarded
to another phone that is on the PSTN.

It seems to me that in the first case, only SIP
redirection is necessary and that this may be
transparent to the PSTN leg of the call?  In the
second case, there may be some SS7 interaction
required.  Has anyone looked at this and if so is
there any documentation on preferred approaches?
If not, does anyone have any thoughts on how it
should be done?

Thanks,
FM

--
Frank W. Miller, Ph.D.
Chief Technical Officer
sentitO Networks, Inc.
www.sentito.com 

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