AT&T MERLIN LEGEND Release 3.1, System Programming Manual

Page: 644 / 887

Remote Access Features
4–272
Programming Procedures
Console Display/Instructions Additional Information PC
2 Assign or remove the list.
Select
Enter Enter
or
0
Delete
Delete
.
8
3 Return to the System Programming menu.
Select
Exit Exit
three times.
555
Remote Access Barrier Codes
Use this procedure to establish or remove barrier code requirements as well as
to establish or remove the barrier codes themselves.
Barrier codes are security passwords that restrict users from making
unauthorized remote access calls on tie and non-tie lines and trunks. Callers are
allowed three attempts per call to enter the correct remote access barrier code.
If the caller enters an incorrect barrier code or times out during code entry, the
caller hears the retry tone. The caller can erase an entered code by dialing
**
(two asterisks). Code erasure is counted as one of the three permitted attempts.
After three unsuccessful attempts, the caller hears a reorder tone and the call is
disconnected. If this happens, the SMDR will contain sixteen 0’s in the Account
Code field to flag the three failed attempts.
A maximum of 16 barrier codes are allowed for all lines/trunks. Each of the 16
barrier codes may be programmed with its own class of restriction (COR).
The systemwide barrier code length can range from a minimum of 4 characters
to a maximum of 11 characters. The default length is 7. If you enter a length that
is less than 4 or greater than 11, the entry is erased and the previous entry
displays on the screen. When the barrier code length is changed, all barrier
codes are erased and must be reassigned. If the barrier code length is changed
and barrier codes are not reassigned, users can dial into remote access trunks
and enter a barrier code, but will be denied access into the remote access
trunks no matter what code is entered.
!
Security Alert:
■
Always use the longest length barrier code allowed on the system.
■
Barrier codes should consist of a random, non-repetitive, hard-to-
guess sequence of digits.
The time and date of the most recent change made to the systemwide barrier
code length is shown during the system programming procedure as well as on
the Remote Access DISA Information report. The SMDR record for incoming
remote access trunks includes the barrier code IDs established in this
procedure.