ZyXEL Communications U-336SA - Manual (Page 65)

Special Functions 51
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With level 2 security, dial back the phone number corresponding
to the dial-in password. The line simply disconnects if the
password does not match.
User Passwords
Fifty user passwords may be defined. The corresponding 50 dial-back
numbers are the modem’s 50 stored phone numbers. Any character
(ASCII 0-127) can be used in the password, the maximum password
length is 8 characters.
Security functions are only accessible through AT commands in terminal
mode. Any access attempt will result in the modem’s prompting the user
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)
********
The command AT*V will list the 50 user passwords and the supervisor
password on the screen for viewing. Again, you will be prompted to
enter the supervisor password first.
The following commands will enable
different types and Verify: (Enter the
new supervisor password again)