[Serusers] More call transfer questions

Steve Blair blairs at isc.upenn.edu
Mon Feb 28 22:37:57 CET 2005


Thanks. The odd thing is I never see the REFER using ngrep. Any idea why?

Evan Borgstrom wrote:

>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
>>
>>_______________________________________________
>>Serusers mailing list
>>serusers at lists.iptel.org
>>http://lists.iptel.org/mailman/listinfo/serusers
>>    
>>
>
>
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