User`s guide

Setting up Meridian Mail security 6-11
Trunk Group Access Restrictions
Standard 1.0 System Administration Guide January 1998
Trunk Group Access Restrictions
Introduction
Trunk Group Access Restrictions (TGAR) controls access to
various trunk groups including trunks that interface with the
exchange network, with TIE and CCSA networks, and with
services such as paging, dictation, and recorded
announcements.
How it works
Stations, TIE trunks, DISA directory numbers (DNs), and
authorization codes are assigned to a group (TGAR). When
users attempt to access a trunk route from a station, TIE trunk,
DISA DN, or authorization code, the Meridian 1 software
compares their group assignment (TGAR) against the list of
denied Trunk Access Restrictions Group (TARG) associated
with the trunk route they are trying to access.
If access is permitted, the Meridian 1 software then uses the
Class of Service (CLS) assignment to determine call eligibility.
The system always uses the most restrictive assignment (CLS or
TGAR) to determine call eligibility when a user is trying to
access trunk facilities directly.
By partitioning stations, TIE trunks, DISA DNs, and
authorization codes into appropriate groups based on your
corporate culture, you can stem internal abuse and external
fraudulent activity, such as “looping” from PBX to PBX or to
other carriers to mask the call’s origin.