Nortel Networks NN43001-314 User Manual
Page 301
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 (
of
) and the Gatekeeper (
"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 (
) 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 Special Number is configured (
) 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.
3
Configure 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 Trunk to 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 make sure
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
20 June 2007
Copyright © 2007, Nortel Networks
.