Nortel Networks Remote Gateway 50 - Manual (Page 107)

Bandwidth Management Page 107 of 258
Main Office Configuration for Survivable Remote Gateway 50 Configuration Guide
Figure 28
Call flow for Scenario 1 - call to remote branch office (originator side)
1 The branch office user dials 6-444-3456. The system transmits 444-3456
to the NRS. The NRS checks its provisioning, and determines that all
calls are to be sent to the main office; it directs the call to the main office.
2 The branch office sends the call to 444-3456 to the main office.
3 The main office determines that this is to another main office. The
system transmits 444-3456 to the NRS. NRS checks its provisioning, and
determines that this call goes to main office B.