[Serusers] RFC3261 Compliance???

[Java Rockx]

Hi All.

I'm using dev12 and I'm interfacing with a company that uses Sonus equipment to terminate to the
PSTN. This company is telling me that SER is not performing to RFC3261 because ACK messages are
not including all the record-route information as stated in section 12.1.2.

Following is an email I recieved from their network engineers. Attached is also a complete
conversation between my SER proxy and their Sonus box. The actual problem is that Sonus
disconnects the call after a few seconds because of an ACK routing issue.

Anyhow can someone advise me on weather or not this is truly a SER issue or a Sonus issue?

Regards,
Paul

+++++++++EMAIL FROM THE GUYS USING SONUS++++++++++++++

No, this is definitely not a Sonus issue.

The response sent from the Sonus to the SER contains the correct set of
Record-Route (every hop that the original INVITE has traversed). When the
SER sends back the ACK, the SER if it acts as a UAC, then must include this
set of Record-Route as Route in the message per RFC3261 section 12.1.2.

I believe you will have problem with this if you interface the SER with any
SIP proxy. I assume that it works with Broadvox because you are connected
directly to their gateway and no other proxy is in between. If you were to
connect directly with the Sonus, then it would work. 

The problem should be fixed on your end. You just need to look into the
code where it generates the ACK and follow RFC3261 section 12.1.2 on how to
build and send it. 




		
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