Alternative Call Routing for Network Bandwidth Management Page 141 of 258
5The main office manipulates the digits and the call is routed to the PSTN in the MO zone (action labeled 2 in Figure 44 on page 138).
Example: Use DMI to delete and insert digits on the PSTN trunk route.
—delete 3 digits (remove the ALTPrefix 777)
—insert 966 (in order to compose the DID number of the destination telephone which is 9663121, a local call.)
6The call terminates on IP Phone B from the PSTN in the BO2 zone (action labeled 3 in Figure 44 on page 138).
A call from a branch office telephone to another branch office telephone
Figure 46 on page 142 shows three systems: one main office and two branch offices.
All three systems are configured with the same Virtual Private Network Identifier (VPNI). All systems have virtual trunks.
The Wide Area Network (WAN) is shown with a gatekeeper/Network Routing Service (NRS) that can be co-resident with one of the Signaling Servers.
Telephone F belongs to branch office 1 in Normal Mode and telephone B is a branch office 2 telephone in Normal Mode.
There are three bandwidth zones indicated by the dashed lines (main office zone [MO zone], branch office zone [BO2 zone], and branch office 1 zone [BO1 zone]). Telephone F and branch office 1 belong to the BO1 zone.
Telephone B and the other branch office belong to the BO2 zone.
Main Office Configuration for Survivable Remote Gateway 50 Configuration Guide
