[SR-Users] ACK not sent and rr-enforced

[Dominguez Jover, Ricardo]

Hi Alex,

As I said I was doubting about this inference, but as calls are working
with other providers and I read the post I linked, I don't really know
in what side the solution is.


The scenario is as follows:

Softphone A - providerProxy - myProxy - Softphone B

Softphone A sends the invite to Softphone B through providerProxy and
myProxy
Softphone B sends the 200OK with CONTACT: "user at softphone_B_contact_URI"
to myProxy
myProxy sends the 200OK with CONTACT: "user at softphone_B_contact_URI" to
providerProxy
providerProxy sends the 200OK with CONTACT: "user at myproxy_IP_address" to
Softphone A
Softphone A sends ACK "sip:user at myproxy_IP_address" and when it arrives
to myproxy it is never sent to Softphone B and there is a timeout 30
seconds later.

Is there anything I can do to solve this?

Thank you,
Ricardo



-----Mensaje original-----
De: sr-users-bounces at lists.sip-router.org
[mailto:sr-users-bounces at lists.sip-router.org] En nombre de Alex
Balashov
Enviado el: martes, 15 de marzo de 2011 17:25
Para: sr-users at lists.sip-router.org
Asunto: Re: [SR-Users] ACK not sent and rr-enforced

On 03/15/2011 08:28 AM, Dominguez Jover, Ricardo wrote:

> Should I infer IPTEL.org is not implementing SIP RFC 3261 in the
> right way? It seems odd to me...

No, Ricardo, that is not the correct inference.  First, if the ACK is an

end-to-end ACK (as for a 200 OK), it is generated by the sending 
endpoint, and the SER proxy is not responsible for constructing it. 
Secondly, there are various reasons why an ACK may have a request line 
not equal to the Contact URI established as the dialog target, having to

do with backward compatibility with RFC 2543.

-- 
Alex Balashov - Principal
Evariste Systems LLC
260 Peachtree Street NW
Suite 2200
Atlanta, GA 30303
Tel: +1-678-954-0670
Fax: +1-404-961-1892
Web: http://www.evaristesys.com/

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