Nortel Networks NN43001-314 - Manual (Page 295)

Zone-based digit manipulation 295
Bandwidth management zones
An IP Peer network is divided into different bandwidth management zones.
Each IP Phone, Virtual Trunk, or Voice Gateway DSP channel is assigned
to a bandwidth management zone. All IP Phones, Virtual Trunks, or Voice
Gateway DSP channels in a bandwidth management zone:
• share the same IP bandwidth management policies
• are geographically near each other
• are all in the same time zone
• are all in the same PSTN dialing plan
A bandwidth management zone is assigned to each Virtual Trunk and Voice
Gateway DS Channel in LD 14. It is assigned in the same way as the ZONE
for an IP Phone in LD 11. This zone enables the trunk to send a setup
message, with a codec list selected according to the Best Bandwidth (BB)
or Best Quality (BQ) criteria for that zone.
For dialing plan purposes, all telephones in the same zone can be treated
identically. Each IP Phone is assigned to a zone during configuration. The
Branch Office feature enables IP Phones that are located in more than one
geographic location to have dialing plan behaviors that are localized to the
telephone location rather than the Call Server location.
Different zone numbers are assigned to different MG 1000B systems.
Zone-based digit manipulation
For Branch Users in Normal Mode, it may be desirable to provide routing
that is different from that provided to main office users. For example, it may
be desirable to route certain calls directly to the MG 1000B PSTN trunk,
rather than receive the same routing as non-Branch Users in the main office.
To achieve this, the Zone Access Code Behavior (ZACB) and Zone Digit
Prefix (ZDP) properties of the Branch Office zone are used to add digits to
the digits dialed by the Branch Office user. The resulting digit string is then
used to route the call. The net effect of this is that a Branch User’s and a
Main User’s call can be routed differently, even though the dialed digits
were the same.
For example, if "1 87654321" is dialed, where "1" is the Access Code, then:
• for a main office user, the call is routed based on the dialed digits.
• for a Branch User, the digits undergo zone-based digit manipulation
(such as inserting "101"), and the call is routed based on the new
manipulated digit string (in this example "1 101 87654321").
Nortel Communication Server 1000
Branch Office Installation and Commissioning
NN43001-314 01.02 Standard
Release 5.0 20 June 2007
Copyright © 2007, Nortel Networks
.