I have a USR Sportster 33.6 Faxmodem connected to a Cisco 2691's aux port, using a cisco roll-over cable. When I dial in to the router, the modem picks up and the aux line's password query comes up, but when I enter the password, the router does not see what I type. However, if I use +++ to get the modem's attention, I can enter modem AT commands, and the modem responds as expected. If I ATO out of the modem and back to the router, eventually the router times out and hangs up.
Here's what my aux line config looks like:
line aux 0 password 7 00071A150754 login modem InOut transport input all
Here's what my terminal session looks like:
ONNECT 9600 /V34/LAPM
% Password: timeout expired! Password: OK