Nortel Remote Gateway 50 Configuration Manual page 97

Table 6
Configuration details for the general case
Region
1, 2, 3
1, 2, 3
1, 2, 3
1
1
1
1
2,3
Main Office Configuration for Survivable Remote Gateway 50
Table 6 describes the network configuration and the steps that a call takes
during its setup.
Call progress
steps
1
2
3
4
Bandwidth Management
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.
All branch offices are provisioned at the NRS to route
all outbound calls (from the branch office) through
the main office. (NRS tandem configuration).
Main office sends all UDP calls to destinations that
are not its own branch office to the NRS with
unchanged dialled digits.
Main office sends all UDP calls to destinations that
are its own branch office to the NRS with a specific
gateway prefix in front of the dialled digits.
All branch offices delete the prefix and any LOC
codes, and terminate the calls. May be to a local set
or to a trunk.
Similar call setup steps take places for calls within
region 2 and 3.
Page 97 of 258
Configuration Guide