ZyXEL Communications Prestige 480 - Manual (Page 134)

Prestige 480 Dual BRI ISDN Router
8-12 Dial-In Server Configuration
Note: The caller always controls Idle Timeout, so the Idle Timeout field does not apply when there is
callback.
8.4.2 CLID Authentication
CLID (Calling Line IDentification) authentication affords you the security of limiting a user to only initiate
connections from a fixed location. The Prestige uses the caller ID sent by the switch to match against the
CLIDs in the database. Please note that for CLID authentication to work on the Prestige, your telephone
company must support caller ID.
8.4.3 Callback
Callback serves two purposes. One is security. When set to callback to a fixed number, an intruder will not
gain access to your network even if he/she stole the password from your user, because the Prestige always
calls back to the pre -configured number.
The other is ease of accounting. For instance, your company pays for the connection charges for
telecommuting employees and you use your Prestige as the dial in server. When you turn on the callback
option for the dial-in users, all usage is charged to the company instead of the employees, and your
accounting department can avoid the hassles of accountability and reimbursement.
Configuring the Prestige for Callback
In this scenario, LAN 1 first calls LAN 2, then LAN 2 calls back to LAN 1. These are the respective SMT
menus.
LAN 1