Black Box 32144, Руководство пользователя

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MODEM 32144
4.14 Manual-Response Password
Protection (MPP)
The modem can be configured
for two types of MPP:
• MPP without callback—The
modem will pass a connection
on to the DTE interface only
after it receives a valid
password.
• MPP with callback—The
answer modem will call back
an authorized user after he
or she enters a valid password.
Both types of security operation
provide security on incoming calls
by requiring remote user to
manually enter a valid password.
In addition, access to Hayes-
compatible commands for viewing
and storing phone numbers is
password protected.
The MPP process is summarized
below.
• A remote (originating) modem
calls the local (answer) modem.
• Local modem answers.
• Remote user sends carriage
return [CR].
• Answer modem confirms
password and grants access (if
programmed for MPP without
callback) or initiates security
callback (if programmed for
MPP with callback).
PASSWORD screen. The change-
password screen will be displayed.
With the cursor in the first
character position, press
pushbutton 2 (SKIP) until a space
appears (flashing
■
). Then press
ENT. The password will be
disabled.
With the password disabled, the
answer modem can connect to
another modem that is not
equipped to use or is not
configured to use APP (for
example, one where a password has
not been entered in the front-panel
change-password screen). However,
it will not be able to connect to a
modem that is programmed with a
password for APP without callback.
To restore the password, replace
the space with the first character
of the password and press ENT.
4.13.2 C
LEARING THE
P
ASSWORD
To clear the front-panel password
from memory, select CLEAR from
the PASSWORD screen. The clear-
password confirmation screen will
be displayed. Press pushbutton 2 to
confirm that you want to clear the
password.
If no password is stored, the
modem will be able to connect
to other modems that are not
equipped to use or are not
configured to use an automatic
password (APP). To temporarily
disable the automatic password,
see the previous section.