Hey Steve,
The INVITE's you're seeing are re-INVITES. They're used to modify the session before the Cisco phone sends the REFER to transfer the call. Check out Section 14 of the SIP RFC (3261).
http://www.faqs.org/rfcs/rfc3261.html
-Evan
On Mon, 2005-02-28 at 16:09 -0500, Steve Blair wrote:
I'm a bit stuck and wonder if someone on this list can help. When a call arrives at a Cisco IP phone registered to our SER proxy from the PSTN it is answered. The called party then tries to transfer the call. In either case a new invite is generated. I'm under the impression a refer message should be generated but given the way attended transfer works on the 7960s it doesn't seem possible to have a refer generated. Has anyone else seen this? If so any thoughts on what is happening?
Thanks,Steve
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