Nortel 1000 Configuration Manual page 133

In a typical network, a full region uses a single Home Location Code
(HLOC). However, it is also possible, where the number of users requires it,
to have two or more codes, although using one for the main office and one
for each branch office is unlikely at best.
Figure 44
Scenario 1: UDP throughout the network
Common details
In general, if an HLOC is shared between two or more systems, the
provisioning at the main office gets more complex, unless all branch offices
share HLOC with the main office. That is, if the main office has two or more
HLOC, and one or more of these (but not necessarily the same one) is used
by every branch office, then provisioning is relatively straight forward.
Table 10 "Configuration details for the general case" (page 133)
the network configuration and the steps that a call takes during its setup.
Table 10
Configuration details for the general case
Call progress
Region steps
1, 2, 3
1, 2, 3
1, 2, 3
Copyright © 2005-2007, Nortel Networks
.
Configuration detail and call progress
during call setup
UDP used for all calls within the region.
UDP used for region to region calls.
Prefixes for branch offices for regular calls are required for
all branch offices. May have additional prefixes for E-911
calls, if required, or may share prefixes.
Nortel Communication Server 1000
Main Office Configuration Guide for SRG 50
NN43001-307 02.02 Standard
Release 5.0 3 December 2007
Network using Uniform Dialing Plan 133
describes