Skip to Content.
Sympa Menu - Re: [] Cisco gateway not handling REFER correctly? [SOLVED]

Subject: SIP in higher education

List archive

Re: [] Cisco gateway not handling REFER correctly? [SOLVED]

Chronological Thread 
  • From: Nimal Ratnayake <>
  • To:
  • Subject: Re: [] Cisco gateway not handling REFER correctly? [SOLVED]
  • Date: Sat, 26 Nov 2005 12:02:43 +0600


It turns out that the problem was that I had not added "application session" on
the corresponding POTS dial peer. After adding that everything works fine.


Nimal R.

Nimal Ratnayake wrote:

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