User`s guide

2(20)
Datum/Date Rev
Dokumentnr/DocumentnrUppgjord/Prepared
Dokansv/Godkänd - Doc respons/Approved Kontr/Checked Tillhör/Referens-File/Reference
98-01-31 B
321/155 34-ASB 150 02 Uen
FACILITY DESCRIPTION
Faktaansvarig - Subject responsible
DEFINITION
Least Cost Routing selects the most economic carrier
for an entered destination number.
Least Cost Routing calculates the predicted cost for
each carrier offering access to the requested
destination. The number analysis and the carrier
database containing price information are the input
data for calculating the predicted cost. Least Cost
Routing selects the cheapest carrier that is available.
The selection of a carrier depends on the current traffic
situation, the authority of the calling party and the
involved trunk, and on the carri
er database. Inputs for the selection of a carrier are for
example:
• Calling party (extension or trunk, authority to use
Least Cost Routing, tenant group, authority to
use a carrier)
• Requested destination (entered destination
number)
• Available carriers (offer access to the requested
destination, free trunks to connect to the carrier)
and their cost information
• Predicted call duration
Glossary
This glossary provides a description of the terms used.
Account Code
The Account Code is a number sent to the carrier for
identification of the calling extension or extension
group for accounting purposes.
Authority Code
The Authority Code is a number sent to the carrier for
identification of the calling company. The carrier uses
the Authority Code for checking the authority of the
calling party.
Call Cost Profile
The Call Cost Profile relates a Cost Time Scheme and
a Cost Level Table to each Destination Number Group
supported by a carrier.
Carrier
Public and private network operators provide carriers.
Examples for carriers are:
• The public network (PTT)
• A carrier selected through the local public switch.
• A separate route to a carrier network
• A tie line to an interworking exchange
Carrier Access Code
The Carrier Access Code accesses the required
carrier via a third party network (e.g. PTT).
Class Of Service (COS)
The COS defines the authorisation of extensions and
trunks.
Command
RASC uses commands to enter data. A command is
defined by a command number and a command name.
This description uses braces „[…]“ for reference to the
command number.
Cost Level
See "Relative Cost Level".
Cost Time Scheme
The Cost Time Scheme is a programmable list of 24
hours and 3 day types. This list defines the Relative
Cost Level for the call according to day time and day
type. The Cost Time Scheme points at a certain line in
the Cost Level Table.
Destination Number
The destination number is the telephone number of the
called party. You might find the destination number in
the public telephone directory.
The user enters this number for access to the re-
quired destination (entered destination number). Least
Cost Routing may modify that number and send it to
the trunk (sent destination number).
Destination Number Group
The Destination Number Group contains destination
numbers having the same telephone charges.