I have been testing Fax For Asterisk with an analog fax sitting behind a Grandstream Handytone 286. I have been sending a number of faxes but I find that they send extremely slow. In my most basic test of sending from the HT286 straight to a tiff image
on Asterisk on the same subnet I am seeing as much as 200 seconds to send a single page. Debug in the CLI shows that we are negotiating down to T.38 4800. I have disabled echo cancellation and noise suppression on the HT286 but with no change. I have
tested with different fax machines (HP 1040 Fax and Sharp UX-B800SE) but with the same results. My Asterisk and FFA module versions are:
FAX For Asterisk Components:
Digium FAX Driver: 1.8.4_1.3.0 (optimized for generic_64)
Your suggestions are appreciated. Thank you.