Dialing plans 65
Dialing plans
Dialing plan configuration allows customers to set up routing tablesto route
calls to the appropriate destination, based on dialed digits. The dialing plan
is configured through the Electronic Switched Network (ESN) feature, using
TM 3.1 or overlaysin the system. With ESN configuration, the system can
route outgoing calls to the IP trunk card. Addresstranslation allows the IP
trunk card call processing to translate the called party number to the IP
address of the terminating IP Trunk3.01 (and later) node and to deliver calls
to the destination through the IP network.
The ITG-Pentium 24-port and Media Card 32-port trunk cards support the
following dialing plans:
•North American dialing plan
•Flexible Numbering Plan
Customer-defined Basic Automatic Route Selection (BARS) and Network
Alternate Route Selection (NARS) Access Codes are used to access the
dialing plans.
The IP Trunk3.01 (and later) dialing plan supports a single customer per
IP Trunk3.01 (and later) node and multiple IP Trunk 3.01 (and later) nodes
per Meridian 1/CS 1000M system. A customer can have multiple IP Trunk
3.01 (and later) nodes in a system, but each node can only support the
dialing plan of a single customer. Multiple customers will require multiple
nodes per system.

Multi-node configuration

The following example explainsa possible configuration between two
Meridian 1/CS 1000M switches to achieveboth resiliency into the IPnetwork
and load balancing.
Meridian 1/CS 1000M switch A has two IP Trunk3.01 (and later) nodes, A1
and A2, for the destination NPA613. ARoute List Block (RLB) is created, in
order to havetwo route entries (onefor each IP Trunk 3.01 (and later) node).
If the trunks of node A1 are all in use or node A1 is down, call traffic is routed
to node A2. This provides resiliency by preventing failure of a single IP Trunk
3.01 (and later) node (for example, DCH failureor Leader subnetfails) from
completely eliminating VoIPser vice fora Meridian 1/CS1000M system.
It is desirable to distribute calls to multiple nodesat a remote destination
Meridian 1/CS 1000M. The configuration of multiple dialing plan entries at
the local IP Trunk3.01 (and later) node allows routing based on the dialed
digits.
Nortel Communication Server 1000
IP TrunkFundamentals
NN43001-563 02.01 Standard
Release 5.5 21 December 2007
Copyright© 2007, Nor tel Networks
.