Nortel Networks NN43001-314

Conﬁguring the dialing plan for PSTN access to Branch Users in Normal Mode 301

digit manipulation occurs before any digit processing in the main

ofﬁce Call Server or NRS.

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 33 "Conﬁguring the

main ofﬁce" (page 299)) and the Gatekeeper (Procedure 34

"Conﬁguring the NRS database" (page 306)), to route the calls

to the Branch Ofﬁce for connection to the local PSTN.

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

ZDP = 101.

If a Branch Ofﬁce user dials "1 87654321", zone digit

manipulation occurs because AC1 was dialed and ZACB = AC1

AC1. 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 MG 1000B. At

the Branch Ofﬁce, the ESN SpecialNumber is conﬁgured (Step

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

on the digits "87654321."

If a 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.

Nortel Communication Server 1000

Branch Ofﬁce Installation and Commissioning

NN43001-314 01.02 Standard

Release 5.0 20June 2007