Nortel Networks NN43001-307

52 Dialing Plan conﬁguration

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/SIP Redirect Server) (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.

If an branch ofﬁce user dials 2 87654321, zone-based digit

manipulation does not occur because AC2 was dialed and ZACB =

AC1 AC1. The digit string remains unchanged 2 101 87654321. The

main ofﬁce routes the call using ESN conﬁguration and the dialed

digits.

3Conﬁgure the Route List Index at the main ofﬁce.

After conﬁguring zone-based digit manipulation, a specialized route

for the call must be conﬁgured. To select a trunk to route calls, a

Route List Index (RLI) must be conﬁgured in the Route List Block

(RLB). The RLI uses the route number for the Virtual Trunkto route

calls to the NRS. A Digit Manipulation Index (DMI) is associated with

the RLI to allow manipulation of the digits to be outpulsed. For this

application, at the main ofﬁce, the DMI is used to update the call

type of the off-net calls to the Special Number (SPN) to makesure

the number stays in the Private/Special Number domain.

a. Conﬁgure the DMI in LD 86 with the DGT feature.

LD 86 Conﬁgure the Digit Manipulation Index at the main ofﬁce

Prompt Response Description

REQ NEW Add new data.

Nortel Communication Server 1000

Main Ofﬁce Conﬁguration Guide forSRG 50

NN43001-307 02.02 Standard

Release 5.0 3 December 2007