Nortel Networks NN43001-307

Conﬁguring the dialing plan for PSTN access to SRG users in Normal Mode 51

LD 117 Deﬁne the zone digit manipulation for the branch ofﬁce zone at the main ofﬁce

Command Description

CHG ZDP <zone> <DialingCode1> <DialingCode2> <DialingCode3>

Define the dialing plan for the branch office zone, where

DialingCode1, DialingCode2, and DialingCode3 are inserted into

the dialed digits between the Access Codeand the remainder of

the dialed number.

The ZDP and ZACB (step 1) properties are used to conﬁgure the

digit manipulation behavior of the branch ofﬁce zone.

The ZDP property is inserted between the Access Code speciﬁed

in the ZACB command and the dialed digits. This zone-based digit

manipulation allows the main ofﬁce Call Server and the network

NRS to distinguish the SRG user calls from the main ofﬁce user

calls, and route them accordingly. The digit manipulation occurs

before any digit processing in the main ofﬁce Call Server or NRS.

ATTENTION

If DialingCode1, DialingCode2, or DialingCode3 are already present in

the dialed digits, then they will not be re-inserted.

Nortel recommends that the ZDP attribute for each branch ofﬁce

zone be set to a unique non-dialable number within the dialing plan

(for example 1019 or 999). This unique non-dialable number can

then be used, when conﬁguring the main ofﬁce ESN Special Number

(step 4 of Procedure 3 "Conﬁguring the main ofﬁce" (page 49))

and the NRS (H.323 Gatekeeper) (Procedure 4 "Conﬁguring the

NRS database" (page 57)), to route the calls to the branch ofﬁce for

connection to the local PSTN.

For example, assume AC1= 1, AC2= 2, ZACB = AC1AC1, and

ZDP = 101.

If an branch ofﬁce user dials 1 87654321, zone digit manipulation

occurs because AC1 was dialed and ZACB = AC1AC1. ZDP is

inserted in the dialed digits to form a digit string of 1 101 87654321.

The call is routed differently than with the digits 1 87654321. ESN

conﬁguration at the main ofﬁce Call Server (step 4) routes the call

to the NRS because it recognizes 101 87654321 after the Access

Code rather than 87654321. The Access Code (1) is not included

in the digit string that is sent to the NRS. The NRS recognizes 101

at the front of the digit string and routes the call to the destination

SRG. At the branch ofﬁce, the ESN Special Number is conﬁgured

(step 2) to remove 101 from the digit string and route the call based

on the digits 87654321.

Nortel Communication Server 1000

Main Ofﬁce Conﬁguration Guide forSRG 50

NN43001-307 02.02 Standard

Release 5.0 3 December 2007