Skip to Content.
Sympa Menu - Cisco gateway not handling REFER correctly?

Subject: SIP in higher education

List archive

Cisco gateway not handling REFER correctly?

Chronological Thread 
  • From: Nimal Ratnayake <>
  • To:
  • Subject: Cisco gateway not handling REFER correctly?
  • Date: Thu, 24 Nov 2005 14:36:42 +0600

Apologies for duplicates. previously posted on



When a call between a SIP phone and a PBX extension is transfered
by the SIP phone to another SIP phone, the SIP gateway does not
seem to handle the REFER correctly. I am using a Cisco 3640 router
running IOS 12.3(12). The call flow is as shown below ( I have
omitted the proxy in this picture)

1602 3423

<------SESSION PROGRESS------------
----INVITE c=IN IP4>
<-----OK c=IN IP4 P.Q.R.S----------
-------REFER Refer-To: 1600------->
<------------NOTIFY OK-------------
-------------- OK----------------->

Shouldn't the gateway do an invite to 1600 after receiving REFER
*before* sending NOTIFY?

Any help or pointers to solve the problem would be appreciated.


Nimal Ratnayake

Archive powered by MHonArc 2.6.16.

Top of Page