Nortel Networks NN43001-106 - Manual (Page 154)

154 Access Restrictions
trunk access codes are dialed and New Flexible Code Restriction tables
are programmed.
If any restrictions are detected when a call is placed, the call is given
intercept treatment as defined in the Customer Data Block.
Class of Service restrictions
The Class of Service restrictions assigned to telephones and TIE trunks
control the degree of access to and from external networks and certain
features within the system. The eight possible Class of Service Access
Restrictions are described in this feature module. These restrictions are
applied by service change overlay programs to terminals.
Table 1 "Type
of terminal and the corresponding overlay program for configuring Class
of Service restrictions" (page 154)
lists the type of terminals and the
corresponding overlay program.
Table 1
Type of terminal and the corresponding overlay program for configuring Class of Service
restrictions.
Terminal Type Overlay
Analog (500/2500 type) telephone 10
Meridian 1 proprietary telephones, Meridian Mail channels 11
Incoming TIE trunks 14
Authorization Codes 88
DISA ports 24
Descriptions of the eight Class of Service Access Restrictions follow, from
the most restricted to the least restricted.
Fully Restricted Service
There are three levels of Fully Restricted Service:
• FR2
— allowed to originate and receive internal calls
— denied access to TIE and Common Controlled Switching
Arrangement networks
— denied access to and from the exchange network, either by dialing,
through an attendant, or using call modification from an unrestricted
telephone
Call modification takes place when certain features are activated
while a call is in progress (for example, Call Park, Call Pickup, Call
Transfer, Conference, or Night Answer).
Nortel Communication Server 1000
Features and Services - Book 1 of 6 (A to B)
NN43001-106 01.04 Standard
Release 5.0 27 July 2007
Copyright © 2007, Nortel Networks
.