13, 2010 1:37 PM
> To: sip-implementors
> Subject: [Sip-implementors] What do you do with a REFER that arrives before
> an ACK.
>
> I am talking to an automaton which transfers a call as soon as it
> sends an ACK for the call. Problem is the REFER may arrive before the
> ACK
See below.
-Original Message-
From: sip-implementors-boun...@lists.cs.columbia.edu
[mailto:sip-implementors-boun...@lists.cs.columbia.edu] On Behalf Of M.
Ranganathan
Sent: Wednesday, January 13, 2010 1:37 PM
To: sip-implementors
Subject: [Sip-implementors] What do you do with a REFER
I am talking to an automaton which transfers a call as soon as it
sends an ACK for the call. Problem is the REFER may arrive before the
ACK does. What should be done with the REFER :
1. Drop silently.
2. Send error ( 5xx with retry-after ? )
3. Accept the REFER and hope the ACK shows up soon ( an
