Nortel 1000 Configuration Manual page 166

166 Alternative Call Routing for Network Bandwidth Management
Figure 67
Digits dialed and outpulsed with Alternative Call Routing for NBWM
1. IP Phone User B in the BO2 zone dials IP Phone A in the main office
2. The main office Call Server determines there is insufficient bandwidth
3. The Call Server inserts the ALTPrefix configured for the BO2 zone prior
4. The call is routed to the virtual trunk by CDP or VNR. The virtual trunk
5. The virtual trunk places the call to the branch office.
Copyright © 2005-2007, Nortel Networks
.
zone (DN 5262) (action labeled 1 in
office telephone in Normal Mode and a main office telephone" (page
164)).
between the two zones.
to IP Phone A's telephone number, dialed by the user.
Example: ALTPrefix assigned is 222. The dialed number becomes 222
5262.
sends a request to the NRS for address resolution. The digit string sent
to the NRS contains the ALTPrefix. The NRS returns the IP address of
the branch office endpoint to the virtual trunk.
Nortel Communication Server 1000
Main Office Configuration Guide for SRG 50
NN43001-307 02.02 Standard
Release 5.0 3 December 2007
Figure 66 "Call between a branch