[Asterisk-Users] T.38 bounty

[Steve Underwood]

Kevin P. Fleming wrote:

> Steve Underwood wrote:
>
>> The T.38 spec defines a streaming protocol over UDP, equivalent to 
>> RTP. The latest version also allows the use of RTP. T.38 can also use 
>> a non-quite-streaming TCP transport.
>
>
> How likely is it that any equipment is going to support T.38-over-RTP 
> soon, though? Since it's so new, I'd suspect that most equipment will 
> only do SIP with T.38 as the media path...

Right now I think you are right. Cisco does T.38 over RTP, but most 
people don't - Cisco did it long before the standard was finalised. 
However, over time I expect things will move in the RTP direction, and 
UDPTL will eventually disappear. It never had a reason to exist in the 
first place, since RTP was already established for other streaming.

I think any new T.38 implementation really ought to support T.38 over RTP.

Regards,
Steve