Subject: [SIP] Call Fowarding feature support

From: "Frank W. Miller" <[email-masked]>
Date: Mon, 2 Jul 2001 11:11:13 -0400

Hi again,

First, thanks for the help with the CIDB feature,
I'll look at the privacy draft.

Second, I have an additional 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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