i've got FFA installed on asterisk 1.6.0.9 to testing T.38 fax. The voip provider is Eutelia in Italy (that support T.38 codecs).
When I send a fax from an analog fax machine to voip number, i get ring tones and not fax tones, and fax doesn't arrive

When I send a fax from a WEB2FAX services, first call arrive in G711, then it switch to T38 codec and after 10secs i get error "T1_TIMEOUT"..
Where is the problem? And why i cannot send fax via a regular fax machine?
Can only send VoIP-to-VoIP and not PSTN-to-VoIP?
Thanks!