XEN Topaz
NEC Business Solutions Ltd
Features and Specifications Manual
Chapter 4 - 203
D
oc. N
o. 8846 -
Release
2.0
Apr
il 2005
LCR – Least Cost Routing
• Description
Least cost routing allows the Topaz system to automatically select the indirect carrier
defined by routing tables within the system.
An indirect carrier is accessed via the PSTN lines connected to the Topaz (these are
the direct carrier lines), a special access code is used to select the indirect carrier, all
dialled digits are passed to the indirect carrier for routing of the call to the destination.
The routing tables list the leading digits of numbers dialled by the users and the
associated indirect carrier access code. It is possible to route calls to more than one
indirect carrier.
Conditions
The PSTN numbers accepted by the indirect carrier may vary, consult the carrier for
details.
Special attention must be given to Emergency calls (Police/Fire/Ambulance etc.), if you
route emergency calls to an indirect carrier you must confirm that they will accept this
type of call.
It is normal practice to have an ‘override code’ that the users can dial to route the call to
a chosen carrier (direct or indirect) in the event of faults with the carrier.
F-Route/ARS operation takes place on the digits dialled by the user, before the trunk is
seized. LCR will use the digits sent to line i.e. after any translation by F-Route/ARS.
Toll Restriction takes place on the digits dialled by the user. Toll restriction check will
take place after any F-Route/ARS operation and before the LCR operation.
Local area calls can not be routed via an indirect carrier that also has Cost Centre
Codes enabled. This is due to the order that the digits are dialled out by the Topaz.
Local calls can be routed via an indirect carrier if Cost Centre Codes are not required.
Default Setting
Disabled.
• Programming
Before Least Cost Routing can take place each trunk must be enabled by Program 14-
01-23.
Calls made via a trunk that is disabled will route to the direct carrier only.
14-01-23 : LCR Service
Set this item to 1 to enable least cost routing.
The operation of dialled numbers beginning with a digit 1 can changed by Program 26-
01-04.
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