Automatic Route Selection (ARS) Feature
Description
Programmable Tables
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 when just one type of line/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
pools, depending on both the area code and the exchange.
In a 6-Digit Table, an area code is the first entry. The remaining 99 entries
are exchanges within the area code. The system scans the first six 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 local area code exchanges that
require dialing a 1, but not an area code before the 7 digits.
