Automatic Route Selection (ARS) Feature

Description

Tables

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 the lowest cost and the extension user�s privilege level or 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.

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 and analog data calls, while BRI lines and other PRI lines support both voice and digital data calls.

Facility Restriction Level � 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.

Topics

Description

	Tables
	Programmable Tables
	Factory-Set Tables
	Star Codes & Automatic Route Selection
	ARS Restrictions for VMI Ports
	How ARS Works
	Table Selection
	Route Selection Within the Table
	Subpatterns
	Restrictions

At a Glance

Considerations & Constraints

Mode Differences

Feature Interactions