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DEFINITY ECS Release 8.2
Administrator’s Guide
555-233-506
Issue 1
April 2000
Features and technical reference
1173Barrier codes
20
Brief description
Each barrier code must have a Class of Restriction (COR) and Class of Service
(COS) assigned. Remote Access has inherent risks; it can lead to large-scale
unauthorized long-distance use. To increase your system’s security use a 7-digit
barrier code with Remote Access Barrier Code Aging. You can administer
Remote Access Barrier Code Aging to:
■ Limit the length of time an access code remains valid and/or
■ Limit the number of times an access code can be used
A barrier code automatically expires if an expiration date or number of accesses
has exceeded the limits you set. If both a time interval and access limits are
administered for a barrier code, the barrier code expires when one of the
conditions is satisfied.
You determine the barrier code length, the actual barrier code, and the barrier code
expiration date on the Remote Access screen. You must administer expiration
dates and access limits for each of the possible 10 barrier codes. If your system
has more than 10 Remote Access users, they must share codes.
When you no longer need a barrier code, remove it from the system. Barrier codes
should be safeguarded both by you and their users. If you use barrier codes for
outside calls, change them often.
If barrier codes are administered, a special answer-back tone causes a calling
modem to leave dial mode. A modem’s dialer is sometimes used to gain access
(this tone also cancels echo suppressors in the network, preventing DTMF tones
from breaking dial tone from a switch). Barrier codes can be used alone or with
authorization codes.
Use the
status remote-access command to view the status of a Remote Access
barrier code.
NOTE:
Barrier codes are not tracked by Call Detail Recording (CDR). Barrier codes
are incoming access codes, whereas, authorization codes are primarily
outgoing access codes.
Related topics
Refer to ‘‘
Remote Access’’ on page 1466 for more information.