said by nunya:
I'm still trying to find out, definitively, if T.38 will even integrate properly with Asterisk and Hylafax. There's a lot of conflicting information out there concerning Asterisk 1.8 and T.38.
I don't use Hylafax so I can't really speak to that, but we are using Asterisk 1.8 and T.38 passthrough works great. We often have it going ATA <-> Asterisk <-> Asterisk <-> provider (yes, 2 * servers back-to-back) and very few problems to speak of (and none that I could attribute directly to Asterisk itself).
I don't think that Asterisk 1.8 can act as a T.38 gateway, though...you'll either need extra software licensed from Digium to do that, or go to Asterisk 10.