[Freeswitch-users] T.38 via UPDATE request

[Michael Jerris]

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