Nortel Networks NN43001-314 Zone-based digit manipulation

Zone-based digit manipulation 295

An IP Peer network is divided into different bandwidth management zones.

Each IP Phone, Virtual Trunk, or VoiceGateway DSP channel is assigned

to a bandwidth management zone. All IP Phones, Virtual Trunks, or Voice

GatewayDSP 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

GatewayDS 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 differentMG 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 receivethe same routing as non-Branch Users in the main ofﬁce.

Toachieve 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 20June 2007