I followed the "IrDA on a cellphone How-To "
From the ppp/connect-errors log it looks like it is dialing, finding the modem at the other end and connecting but it hangs up before the authentication. Any clues / pointers.
abort on (NO CARRIER)
abort on (NO DIALTONE)
abort on (BUSY)
send (+ATZ^M)
expect (OK)
+ATZ^M^M
OK
-- got it