Avaya Communication Manager Administrator's Manual page 1647

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 Communication Manager). Barrier codes
can be used alone or with authorization codes.
To view the status of a Remote Access barrier code, use the status remote-access command.
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.
When you no longer need a barrier code, remove it from the system. Barrier codes should be safeguarded
both by you and their users.
Authorization Codes
You can also administer authorization codes to manage access to your system. You can then use CDR to
track this code use. Use these guidelines to manage your system's authorization codes.
•
Assigning codes — Create random codes; do not allow them to follow a predictable pattern. Use
the maximum code length allowed and assign a unique code to each person responsible for
protecting the code.
•
Changing codes — Change codes often.
•
Deleting codes — Delete codes when they are no longer needed.
•
Monitoring codes — Use CDR reports to analyze code use.
Alternate Facility Restriction Levels
Consider changing FRLs with AFRLs after normal business hours to restrict where calls can be made
over your facilities. Take care not to restrict callers from summoning emergency services after hours.
Class of Restriction
The COR of an authorization code supersedes that of a barrier code.
•
Time of Day Routing — Controlled by the time-of-day entries in COR or by the partition.
•
Toll Restriction and Analysis — Controlled by COR.
•
Trunk Access Code — Interacts with toll restriction. You can translate your Communication
Manager so users can make toll calls via ARS without using a trunk access code.
•
Trunk Administration — Remote Access trunks can be restricted.
For additional steps to secure your system and to find out about obtaining security information on a
regular basis, see the Avaya Tool Fraud and Security Handbook.
Logoff Notification
Use Logoff Notification when Remote Access is enabled, but not actively used. Logoff Notification
notifies you at logoff that Remote Access is enabled. It guards against inadvertently leaving Remote
Access active and can also alert you to unauthorized feature activation. Logoff Notification is
administered by login ID.
Administrator's Guide for Avaya Communication Manager
November 2003
Feature Reference
Remote Access
1647