[asterisk-users] FFA SendFax rejects T.38 reINVITE (488 Not acceptable here)

[David Backeberg]

On Tue, Oct 19, 2010 at 11:48 AM, VoIP Question <voip.question at gmail.com> wrote:
> The whole point (as I specified in the header and initial message) is the
> attempt to use "Fax for Asterisk" to send the message.

Asterisk can handle audio passthrough faxing. I'm talking audio faxing
over SIP. You compile against this thing called SpanDSP, and then
asterisk squawks audio tones over the line. It's amazing.

Until you've tried it, you don't know whether it could work.

I'm under the assumption that you'd rather have faxing at all than
faxing over T.38.

The world is littered with broken T.38 implementations. Just because
it's a standard, doesn't mean people follow it. Ever heard of HTML?
Which browsers follow it to the letter? You seem to have never
successfully exchanged a fax with your target, so I don't know why you
think the far end isn't broken.

Try turning off t38 and see what happens.