Define the dialing plan information 321
5. DSC – Distance Steering Code, part of a Coordinated Dialing Plan
(CDP) network. In a CDP network, all numbers must be leftwise-unique
as all the systems in that network are viewed by the end user as part
of one system.
For example,Network ABC has half of the users on a Meridian 1 system
and half on a CS 1000E system. The Meridian 1’s extensions start with
5; for example,5xxxx. The Meridian 1 routes calls with Dialed Numbers
that start with 7 (for example, 7xxxx) through the IP Trunkcard to the
CS 1000E system.
6. TSC – TrunkSteering Code, also par t ofa Coordinated Dialing Plan
(CDP) network. See DSC for an explanation of a CDP network.
Performing digit manipulation on outgoing numbers might adversely
affect non-call-associated signaling for MCDN features. These features
include: NRAG, NMS, NACD, and NAS.
The Typeof Number (TON) and Numbering Plan Identification (NPI) fields
in the Information Element (IE) of the ISDN message direct the call to
the correct address translation table. Table 51 "Mapping of dialing plan
with TON and NPI" (page 321) shows the mapping between the NPI/TON
fields and the resulting IP Trunk3.01 (and later) dialing plan tables which
are searched.
Table 5 1
Mapping of dialing plan with TON and NPI
NPI TON Dialing plan
E.164 National NPA
E.164 Subscriber NXX
E.164 International SPN
E.164 Unknown SPN
DSC
TSC
LOC
Private UDP LOC
Private SPN SPN
Private CDP DSC
TSC
Nortel Communication Server 1000
IP TrunkFundamentals
NN43001-563 02.01 Standard
Release 5.5 21December 2007
Copyright© 2007, Nor tel Networks
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