ZyXEL Communications U-90E, Руководство пользователя

Страница: 95 / 152

U-90E Data/Fax Modem
Special Functions
10-1
Chapter 10
Special Functions
This chapter describes special features of the U-90E, and offers instructions on how to
use them.
10.1 Security Functions
Your modem provides a security function that prevents unauthorized users from making
connections. Two types of
security functions are provided.
•
Type 1 security is used when the remote modem is also a ZyXEL modem.
•
Type 2 security is used when the remote modem is a modem of another brand.
In the type 1 connection, the dial-in remote modem will send its supervisor password for
checking at the initial connection, and the local modem will check this password against
its pre-stored acceptable password list.
In the type 2 connection, the remote terminal will be prompted to enter the password at
the initial connection and the local modem will do the password checking.
10.1.1 Levels of Security
Two levels of security are provided:
•
With level 1 security, the local modem will maintain the connection if the password is
OK, otherwise the line will be disconnected.
•
With level 2 security, the local modem will dial back the phone number corresponding
to the dial-in password. The line will simply disconnect if the password does not
match.