Code restriction – Nortel Networks NN43001-106 User Manual
Page 158
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Access Restrictions
UNR
CTD/CUN
TLD
SRE
FRE
FR1
FR2
Outgoing
toll trunk
calls (0 or
1+ on COT
or FX)
Yes
No direct
access
Yes, if using
BARS/
NARS
No
direct
acces
s
Yes, if
using
attend
ant or
UNR
teleph
one
No direct
access
Yes, if using
attendant
or UNR
telephone
No direct
access
Yes, if
using UNR
telephone
No
No
To/From
TIE trunk
Yes
Yes
Yes
Yes
Yes
Yes
No
To/From
internal
Yes
Yes
Yes
Yes
Yes
Yes
Yes
BARS/
NARS calls
TGAR = No
Uses
NCOS
only
Uses NCO
S only
Uses
NCOS
and
CLS
Uses NCO
S and CLS
Uses NCO
S and CLS
Uses
NCOS
and
CLS
Uses
NCOS
and
CLS
BARS/
NARS calls
TGAR =
Yes
Uses
NCOS
and
TGAR
Uses NCO
S and
TGAR
Uses
NCOS
, CLS,
and
TGAR
Uses NCO
S, CLS, and
TGAR
Uses NCO
S, CLS, and
TGAR
Uses
NCOS
, CLS,
and
TGAR
Uses
CLS
only
Code Restriction
Code Restriction allows limited access to the toll exchange network to
stations and TIE trunks with a Toll Denied Class of Service (TLD). A Code
Restriction Block that specifies the allowed area and exchange codes (200
through 999) is built for each trunk route. This block restricts access to
specific area and exchange codes by monitoring the digits dialed.
There can be only one Code Restriction Block per route. The only routes
that use Code Restriction Blocks are Central Office Trunk (COT) and FX,
since they are toll routes. Code Restriction Blocks are ignored for all other
types of routes.
When a telephone or TIE trunk with a CTD, CUN, or TLD Class of Service
directly access a COT or FX route, the system examines the Code
Restriction Block to determine the call eligibility.
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
.