[Users] T.38 together with OpenSER+RTPProxy and OpenPBX not working

[Bastian Schern]

Hi Bogdan,

I think it has nothing to do with a deadlock. I see the incoming and 
outgoing UDPTL traffic on both SIP-FAX devices.

Do you got a suggestion for me, what I could do to locate and resolve the 
problem.

Cheers
	Bastian

--On Donnerstag, 16. November 2006 14:12 +0200 Bogdan-Andrei Iancu 
<bogdan at voice-system.ro> wrote:

> Hi Bastin,
>
> probably there is  kind of a RTP deadlock between the RTPproxy and
> OpenPBX - both are waiting for the other party to send the media before
> sending on its turn.
>
> try something like:
>     if (nat_uac_test("8")) {
>           force_rtp_proxy();
>     } else {
>           force_rtp_proxy("r");
>     }
>
> refer to http://www.openser.org/docs/modules/1.2.x/nathelper.html for
> more details.
>
> regards,
> bogdan
>
>
> Bastian Schern wrote:
>
>> Hi everybody,
>>
>> I've got a question: Does anybody get T.38 working between OpenPBX and
>> OpenSER + RTPProxy?
>>
>> The following scenarios are working fine:
>>
>> 1: SIP-FAX1 (pub. IP) <-> OpenPBX             <-> SIP-FAX2 (pub. IP)
>> 2: SIP-FAX1 (NAT)     <-> RTPProxy+OpenSER    <-> SIP-FAX2 (pub. IP)
>> 3: SIP-FAX1 (NAT)     <-> RTPProxy+OpenSER    <-> SIP-FAX2 (NAT)
>> 4: SIP-FAX1 (pub. IP) <-> OpenSER <-> OpenPBX <-> SIP-FAX2 (pub. IP)
>>
>>
>> But the following scenario is not working:
>>
>> SIP-FAX1 (NAT) <-> RTPProxy+OpenSER <-> OpenPBX <-> SIP-FAX2 (pub. IP)
>>
>>
>>
>> It seems to be that the RTPproxy has a problem with the OpenPBX but no
>> Problem with SIP-FAX-ATAs.
>>
>> Does anybody have an idea what's going wrong???
>>
>>
>> Cheers
>>     Bastian
>>
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>