Nortel Remote Gateway 50 Configuration Manual page 217

Figure 74
UDP using location codes
Main Office Configuration for Survivable Remote Gateway 50
Call scenarios
This section describes how calls interact between the SRG and main office
with UDP.
Calling from main office to the SRG and SRG PSTN, in Normal
mode
In this scenario, a telephone registered at the main office calls a telephone
registered to the SRG, or makes a call over the PSTN through the SRG.
Figure 75 on page 218
Dialing Plan configuration
shows this scenario.
Page 217 of 258
Configuration Guide