Lucent Technologies MERLIN LEGEND Release 7.0 Feature Reference page 141

MERLIN LEGEND Communications System Release 7.0
Feature Reference 555-670-110
Features
Automatic Route Selection
In addition to the fully programmable tables, ARS has four factory-set tables:
Dial 0 Table. This factory-set table routes calls to numbers that start with 0.
The international dialing code, 011, is treated as a special case and can be
put into a programmable table. If 011 is not specified in a programmable
table, international calls are routed through the Dial 0 Table. Programming
of this table is limited to a single pool, its FRL, and system-prefixed digits.
Special Numbers (N11) Table. This factory-set table routes calls to the
special numbers 411, 611, 811, and 911. The main pool is always used.
The pool routing for this table is not programmable.
!
Default Toll Table. This factory-set table routes toll calls to numbers that
do not match entries in any of the area code, 6-digit, or 1 + 7 digits tables.
This table has two subpatterns of up to six routes each, but neither
absorbed digits nor system-prefixed digits are used.
Default Local Table. This factory-set table routes local calls to numbers
that do not match entries in the local exchange tables. This table has two
subpatterns of up to six routes each, but neither absorbed digits nor
system-prefixed digits are used. In Release 3.1 and later systems, routes
assigned to the Default Local Table are factory-set with an FRL of 2.
The system can have up to 20 tables, 16 of which are fully programmable. The
Dial 0, Special Numbers (N11), Default Toll, and Default Local tables are factory-
set and allow limited programming.
Each table (where appropriate) can have two subpatterns (A and B) with an
associated start time. The start time for Subpattern A is specified as the stop time
for Subpattern B. One subpattern or the other is selected, based on the time of
day and the subpattern start time. (If both subpatterns have 00:00 start time,
Subpattern A is selected.) Each subpattern can contain up to six routes, listed in
order of preference or cost effectiveness.
In addition, each route has an FRL associated with it. The FRL is used to refine
the route selection process further. Each extension, remote access barrier code,
CAUTION:
Unless networked systems are collocated, each system should have
at least one loop-start line connected to the PSTN. The line is
required to allow connection of a power-failure telephone to the
Power-Failure Transfer (PFT) jack on a module as a power outage
backup and for correct routing of emergency and other N11 calls. To
ensure that the correct services are reached, if the loop-start line is
used for emergency or other N11 calls, it should be assigned to the
main pool. In this case, IXC calls determine the number of loop-starts
required. See ''Power-Failure Transfer'' on page 507
more information.
Issue 1
April 1999
81
of this guide for