User`s guide

4(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
OPERATION
This chapter informs about the basic principles of
Least Cost Routing and gives some examples.
Basic Principles
1. You may program for each trunk line and for each
extension whether Least Cost Routing shall be used.
Incoming calls from trunk lines or tie lines always use
Least Cost Routing when required for the outgoing
trunk.
2. Least Cost Routing analyses the number entered by
the extension (or received from an incoming trunk line
or tie line). The result is a number of carriers being
capable of connecting it to the desired destination.
3. Least Cost Routing calculates the predicted cost for
possible carriers. The calculation of the predicted cost
can be done on the basis of call duration or pulses.
Both billing principles take initial cost per call into
consideration.
4. Least Cost Routing uses the cheapest carrier for
setup of the connection to the desired party. If the lines
to the cheapest carrier are busy, alternative selections
are made. The number of alternative selections is
programmable per extension (choices: no/1/all
alternative carriers). Incoming trunk lines have no
alternative choice; they always have to use the
cheapest carrier for outgoing calls.
5. Least Cost Routing modifies the entered number if
this is requested by the carrier’s requirements.
6. Least Cost Routing supports the Tenant Function.
John M. Uses a BusinessPhone Exchange
John M., one of the many satisfied users, has to make
a call to the United States of America. Today is a
normal working day. It’s 3:30 PM. John decided not to
use his red telephone. The red telephone may give him
direct access to Bill C., yet his intelligent ASB150 02
system telephone offers cost effective connections.
John M. and the configuration of his exchange are
used for some examples. John’s ASB150 02 has
access to two carriers and one tie line. The chapter
„Information on Carriers“ provides more information on
the configuration of John’s ASB 150 02 exchange.
Information on Carriers
The table below shows the Cost Level Scheme Name
and the leading digits of the destination number.
Carrier 1: PTT
The PTT charges with respect to the distance of the
call.
Carrier 2: Ferrari
The carrier „Ferrari“ does not cover all public
destination numbers. The PTT network is used to
access the carrier „Ferrari“.
Carrier 3: Tie Line „Vie“
A tie line to Ericsson Schrack Vienna is available.
Cost Level Scheme Destination Number
PTT A (local calls)
PTT B (national calls)
PTT C (long distance)
1...-9...
0...
00...
Cost Level Scheme Destination Number
Ferrari A
Ferrari B
Ferrari C
01...
02...
001...
Cost Level Scheme Destination Number
Tie Line Vie 0222 81100...