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User's Guide for ZyXEL Omni 56K and Omni 56K Plus Modems
3-11
With the type 1 connection, the dial-in (remote) modem will send in its supervisor password for
checking at the initial connection handshake, and the local modem will check this password against
its pre-stored acceptable password list. With a type 2 connection, the remote terminal will be
prompted to enter the password at the initital connection and the local modem will do the password
checking.
Two levels of security are provided. With level 1 security, the local modem will maintain the
connection if the password check is OK, otherwise the line will be disconnected. With level 2
security, the local modem will disconnect the line if the password has been found in its pre-stored
acceptable list and then will dial back the phone number corresponding to the dial-in password. The
line will be simply disconnected if the password does not march.
4 user passwords may be defined. The corresponding.4 dial-back numbers are the modem’ s 4
stored phone numbers. Any character(ASCII 0-127) can be used in the password, the maximum
password length is 8 characters.
The security functions are only accessible through AT commands in terminal mode. Any access
attempt will result in the modem’ s prompting to enter the supervisor password. The attempt will be
rejected if the entered password is not correct. The default supervisor password is ZyXEL when the
modem is shipped from the factory. This supervisor password is also the password sent for
automatic password checking in a type 1 connection. To modify the supervisor password, use
AT*HS
You will be asked for the original password and a new password and then to re-enter the new
password for verification. For example:
PASSWORD (Enter supervisor password)
********
PASSWORD (Enter new supervisor password)
********