[Freeswitch-users] T.38 via UPDATE request

[Peter P GMX]

Hello Michael

this is a productive system, so I can currently not update to the
current trunk.
But the installed SVN is 14741. Were those changes after 14741? Then
I'll try to find a timeslot at night in order to update freeswitch.

But Freeswitch should forward the UPDATE request in proxy-media mode, right?

Best regards
Peter

Michael Jerris schrieb:
> There was just a bunch of work on UPDATE, can you confirm this is the  
> same behavior with trunk?
>
> On Oct 14, 2009, at 6:55 AM, Peter P GMX wrote:
>
>   
>> Hello,
>>
>> we have the following problem.
>> 2 Fax machines are communicating via Freeswitch. One is externally
>> attached via a Telco who is able to handle T.38. The other one is
>> attached locally.
>>
>> When 2 Fax machines start syncing each other, the Telco sends a SIP
>> UPDATE message with T.38 SDP, as it detects fax during the fax  
>> negociations.
>> Freeswitch answers with an SIP OK message back to the telco, and I can
>> see the T.38 SDP on the debug console of freeswitch.
>> Then nothing happens any more until one of fax machines detects  
>> timeout.
>>
>> We have set proxy-media to true. However is was done during call setup
>> when both machines communicated with G711 SDP.
>> The UPDATE message was commited by FS to the telco, but was not sent  
>> to
>> the other fax, so I think in this case Freeswitch is supposed to
>> transcode between T.38 and G711 which it cannot do, as we know.
>>
>> How can I overcome this scenario? Is this a defect, should freeswitch
>> send the UPDATE message to the other fax?  Or is there a workaround?
>>
>> Best regards
>> Peter
>>     
>
>
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