ZyXEL Communications Prestige 128Plus, Руководство пользователя, Страница: 121 / 203

Prestige 128+ ISDN Router
Dial-In Server Configuration 8-11
Table 8-4 Edit Dial-in User Menu Fields (continued)
Field Description Option
Rem CLID If you enable CLID Authen field in Menu 13, then you need to
specify the telephone number from which this user calls. Your
Prestige will check the CLID in the incoming call against the
CLIDs in the database. If they do not match and CLID Authen is
Required, your Prestige will not answer the call.
Idle Time-
out Enter the idle time (in seconds). This time-out determines how
long the dial-in user can be idle before your Prestige disconnects
the call when the Prestige is calling back.
Idle time is defined as the period of time where there is no data
traffic between the dial-in user and your Prestige. The default is
300 seconds (5 minutes).
Default=30
0 seconds
Once you have completed filling in Menu 14.1 - Edit Dial-in User, press [Enter] at the
message [Press ENTER to Confirm…] to save your configuration, or press [Esc] at any time
to cancel.
8.4.1 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.
8.4.2 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