User`s guide

5(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
John M. Enters a Public Telephone Num-
ber
John lifts the handset and presses the name selection
key. In this key, an Internal Access Code and a public
telephone number are stored.
ASB 150 02 immediately responses with the dial tone
[2034] after receiving the Internal Access Code,
although ASB 150 02 does not send the number
immediately. Not even a trunk line is seized for John.
What does ASB 150 02 do with the entered number?
Authority Analysis
This analysis checks the authority of the extension and
the trunk.
Input of the analysis
• The entered Internal Access Code.
• The directory number of the extension.
Database for the analyses
• Does the trunk related to the Internal Access
Code require Least Cost Routing? [1028]
• Does the extension have the authority to over-
ride Least Cost Routing? [0152]
Output of the analysis
• The authority analysis decides whether Least
Cost Routing has to be performed.
Example
John M. has no authority to override Least Cost
Routing. The trunk(s) defined by the Internal Access
Code require(s) Least Cost Routing. Therefore, Least
Cost Routing performs the number analysis.
(Otherwise the number would be dialled as stored in
the name selection key.)
Number Analysis
The number analysis uses the entered destination
number to find the related Destination Number Group.
(See also chapter „Direct Access to Carrier“ (on page
16) for information on number modifications before the
number analysis.)
Input for the analysis
• The entered destination number.
• The Predigits related to the entered Internal Ac-
cess Code.
Database for the analyses
• Destination Number Cross Reference Table
[2250]
• Public Destination Number Table [2240]
Output of the analysis
• A Destination Number Group that represents the
entered number.
Further use of the output
• The Destination Number Group is used for carri-
er and cost analyses.
The number analysis uses the following search order
1. The first column of the Destination Number Cross
Reference Table is checked first. The analysis stops if
a match was found in this table.
2. The search continues with the Public Destination
Number Table if no match was found in the first column
of the Destination Number Cross Refer-ence Table.
Destination Number Cross Reference Table
The number analysis searches for a matching desti-
nation number in the first column and uses the related
Destination Number Group for the carrier analysis.
If in ASB 150 02 there are directly connected lines to
more than one network, Least Cost Routing needs the
Destination Number Cross Reference Table.
Purpose of the Destination Number Cross Reference
Tabl e
• The table defines Destination Number Groups
that can be called via different directions (net-
works). It is possible to define destination num-
bers for up to four directions.
• The table shows what has to be dialled by Least
Cost Routing in order to reach the same destina-
tion via different directions.