Lucent Technologies MERLIN LEGEND Release 5.0 Feature Reference page 102

MERLIN LEGEND Communications System Release 5.0
Feature Reference 555-650-110
Features
Automatic Route Selection
First Digit Not a 1, N11, or Equal Access Code
All but the Local Exchange, Default Local, and Dial 0 Tables are eliminated.
Area Code Tables Local Exchange
Dial 0 Table
Next, ARS examines the entries in the Local Exchange Tables:
If ARS finds only one match, it selects that Local Exchange Table.
If ARS finds more than one match, it selects the lowest-numbered Local
Exchange Table.
If ARS finds no match and the first digit is 0, it selects the Dial 0 Table.
If ARS finds no match and the first digit is not 0, it chooses the Default
Local Table.
First Digit a 1 (Not an Equal Access Code)
ARS eliminates the Default Local, Dial 0, Special Number, and Local Exchange
Tables and proceeds as described below.
Area Code Tables Local Exchange
Dial 0 Table
If only a 1 and seven digits have been dialed and there is one 1+7 Table that
matches, it is chosen. If more than one table matches, the lowest-numbered table
is chosen. If there are no 1+7 Tables that match, ARS picks the Default Toll Table.
If more than seven digits have been dialed after the 1, the 1+7 Tables are
eliminated. The next three digits following the 1 are compared to the 3-digit area
codes in the Area Code Tables and the first three digits of the 6-Digit Tables; any
unmatching tables are eliminated. If there are no matches, the Default Toll Table
is selected.
If there are matching tables, the next three digits are compared to the second
through ninety-ninth entry in the remaining 6-Digit Tables. If there is only one
match, that 6-Digit Table is used. If there is more than one match, the lowest
6-Digit Table is used. If there are no matches and there are no area code tables
left, the Default Toll Table is selected. If there are no matches and there are Area
Code Tables that have not been eliminated, one of the Area Code Tables is
chosen. If there is one table left, it is used. If there is more than one table, the
lowest one is used.
Figure 1 is a flowchart that shows how a table is selected.
6-Digit Tables
Tables
Special No. (N11) Default Toll Table Default Local
Table
6-Digit Tables
Tables
Special No. (N11) Default Toll Table Default Local
Table
Issue 1
June 1997
Page 70
1+7 Tables
Table
1+7 Tables
Table
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