CXR V.34bis series, Руководство по эксплуатации и установке, Страница: 47 / 150

Modes and Configurations
V.34bis Series Standalone & Rackmount Modems
43
number value into the next directory listing
(AT&Z1).
The ATTR
is set to D.
Security
There are extensive security features in the AJ modems to prevent
unauthorized access to the modem or attached equipment. The operation
of these features allows different means of security to be utilized as best
suited to the application. There are some precautions that should be taken
to make access more difficult:
>
Passwords should be protected on a "need to know" basis.
>
Passwords should be changed frequently, especially if there is a
turnover of personnel.
>
Passwords should be alphanumeric and not something easily guessed.
The most frequently used combination for the safes on the Manhattan
Project was "238". If "TEST" or "JOE" were used for passwords, the
most unsophisticated attempts would breach the security. Using a
password such as "B45M9J3" would require a nearly impossible effort
to achieve access.
Please do not forget the passwords. There is no
easy way to access the modem for that
circumstance and a return to the factory for repair
may be required.
Password Security
There are two types of passwords defined. The "operator" password is
required to operate the modem. The "supervisor" password is required for
higher level procedures such as to change options or to view memory. The
operator defines the 2 passwords using the "%PO" and "%PS" commands
described above.
Suppose that the following commands are entered:
AT%PO:USER:USER
AT%PS:SUPER:SUPER
AT%SC1