Lucent Technologies 8.2

DEFINITY ECS Release 8.2

Administrator’s Guide

555-233-506 Issue 1

April 2000

Features and technical reference

1173Barrier codes

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 barri er code, and the barrie r 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 syste m. Barri er co des

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 sometime s u sed 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.