[asterisk-users] t38 iax trunk

[Steve Underwood]

dubravko caric wrote:
> Hi all,
>
> I have a question regarding using T38 for fax sending and here is my 
> scenario:
>
> fax -> SIP ATA (T38 enabled) -> Asterisk #1 -> IAX TRUNK -> Asterisk 
> #2 -> SIP ATA (T38 enabled) -> fax
>
> My question is, how can I know if I'm really using T38? is T38 
> information coming to the other side (because of SIP to IAX 
> conversion) or just plain g711a data?
>
> I'm using Linksys SPA2102, Asterisk 1.4.22 (configured with 
> t38pt_udptl = yes) and I have a pretty good link so faxes are going 
> through even if T38 is switched off. Interesting thing  is that faxes 
> are going through even when one ATA is T38 enabled and the other isn't...
There is no definition for how T.38 messages would be handled in an IAX 
stream, so I doubt you are sending T.38 data between those two Asterisk 
boxes.

Regards,
Steve