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MERLIN LEGEND Communications System Release 5.0
Feature Reference
555-650-110
Issue 1
June 1997
Features
Page 66
Automatic Route Selection
A table contains some or all of the following types of information:
■
Table Type. Indicates how to interpret the information in the table. Table
types are Area Code, Local Exchange, 6-Digit, 1 + 7, Dial 0, Special
Numbers (N11), Default Toll, and Default Local. Details for each table type
are discussed later in this section.
■
Digit Strings. Table includes 3-digit entries, usually area codes or
exchanges. Dialed digits are compared to the stored digits. A match should
occur in only one table and cause selection of the routes in that table.
■
Subpattern. An array of up to six routes. There are two subpatterns for all
tables except the Special Numbers (N11) and Dial 0 tables. The subpattern
selected depends on the time of day that the call is made and the start time
associated with each subpattern. (The start time for Subpattern A is
specified as the stop time for Subpattern B.)
The Special Numbers (N11) Table always uses the main pool and thus has
neither subpatterns nor routes. The Dial 0 Table has no subpatterns and
only one route.
■
Routes. A structure that defines possible lines/trunks to be used in a
preferred order, usually based on lowest cost and the extension user’s
privilege level or Facility Restriction Level (FRL). Routes cannot be
programmed for the Special Numbers (N11) Table. A route contains the
following types of information.
— Pool. A group of lines/trunks that are to be used for this route. A pool
must be programmed before any other route information.
NOTE:
If you are using data in your system, program pools, including the
default pool, for the proper data type. For example, a pool with T1
data-only lines cannot be used for voice calls. Loop-start,
ground-start, T1 voice, and some PRI lines support only voice
calls, while BRI lines and other PRI lines support both voice and
data calls.
— Facility Restriction Level (FRL). A value from 0 to 6 associated with
the route. For routes, 0 is the least restrictive and 6 the most restrictive
value. In order to use a route, a caller (according to extension or remote
access barrier code/trunk) must have an FRL that is equal to or greater
than the FRL of the route.
— Absorbed Digits. The number (0–11) of user-dialed digits that ARS
absorbs (does
not
dial out) on this route. Digits are absorbed starting
with the first user-dialed digit, after any leading star codes.
— System-Prefixed Digits. A string of up to 20 digits (0–9, *, and Pause)
that ARS dials out on this route
before
dialing any remaining user-dialed
digits but after dialing any user-dialed leading star codes.