Instruction manual

Features
■ Routes: A structure that defines possible trunks to be used in a
preferred order, usually based on lowest cost and the telephone 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 trunks that are to be used for this route. A pool
must be programmed before any other route information.
— Facility Restriction Level: A value from 0 to 6 associated with
the route. (0 is the least restrictive and 6 is the most restrictive.)
A caller (telephone or Remote Access Barrier Code/Trunk) must
have a level that is equal to or greater than that of the route in
order to use the route.
— Absorbed Digits: The number (0 to 11) of user-dialed digits that
ARS will absorb (not dial out) on this route. Digits are absorbed
starting with the first user-dialed digit.
— Prepended Digits: A string of up to 20 digits (0-9, *, and pause)
that ARS will dial out on this route before dialing any remaining
user-dialed digits.
ARS allows up to 16 programmable tables, each of which may contain one of
the following types of information:
■ Area Code Tables: These tables are lists of 3-digit area codes. Area
code tables are useful if just one type of trunk (for example, a regional
WATS trunk) is used for all calls to each area code on the list.
■ Local Exchange Tables: These tables list 3-digit exchanges within the
local area code. They can be used to route calls over in-state WATS
lines.
■ 6-Digit Tables: If the cost of calls to another area code varies according
to the exchange, this table can be used to route calls on different trunk
pools, depending on both the area code and the exchange.
In the 6-digit tables, an area code is the first entry and the remaining 99
entries are exchanges within the area code. The system scans the first 6
digits of the user-dialed number (area code and exchange) to route the
call.
■ 1+7 Tables: In some areas, callers must dial a 1 and a 7-digit number to
call certain exchanges even though the call is within the local area code.
A 1 + 7 table contains a list of exchanges within the local area code that
require dialing a 1 but not an area code before the 7 digits.
Automatic Route Selection 49