Receive fax

I try to send fax from pstn to my asterisk.
I installed spandsp.
set tick in the Enabled and wrote Fax Email in Extension settings.
If I send fax from IVR (to fax recepient) it works
If I transfer call to 666 it works.
But if I call to extension 3025 and press start, it not work. it can’t detect fax?
How can I setup receiveing fax in-call?

(sorry for my bad english)