User`s manual

U.S. Robotics I-modem Command Reference
Dial Security • Page 9-8
Autopass
Autopass is the default form of password protection. Autopass automates the process of
logging in to the host modem, but it requires close cooperation between the guest and host
devices.
Using Autopass requires that:
¥ Both the host and guest devices are made by U.S. Robotics and have Dial Security
enabled.
¥ The connection between the I-modems or modems is under V.42 error control (that is,
both modems must be set to &M4 or &M5).
Note Since V.42 error control is not available for V
.120 and V.110 connections,
Autopass is not available for calls that use those protocols.
When a guest device attempts an Autopass connection, the guest includes its password in
its V.42 error-control request. The host modem checks all the enabled passwords in its
security accounts for a match.
¥ If the guest includes an invalid password, the host sends an INVALID PASSWORD
message and hangs up.