Instruction manual

Automatic Route Selection (ARS)
● Area Code (NAA) Routing Table: Entries may include every North American NAA and
Special Number NAA, each with an associated ARS Routing Pattern. All NAAs existing
before 1995 are assigned Routing Pattern #1 by default. As new NAAs are created, they
have to be assigned routing patterns.
● Other Area Code Exception List: One List with up to 512 eight-digit numbers. Each entry
has an associated ARS Routing Pattern.
● Digit Translations Tables: One per trunk group.
A system can have up to eight ARS Routing Patterns assigned. Each pattern can contain up to six
routes (three per subpattern).
Interactions
The following features interact with Automatic Route Selection.
Bridging of System Access Buttons: When a station user originates a call on a Bridged Access
button and dials the ARS code, the call is completed according to the restrictions assigned to that
station, not the principal station.
Callback Queuing: Implementation of Callback Queuing affects ARS in three respects:
● On-hook ARS queuing is allowed.
● Callback Queuing and ARS share a common queue, which has a capacity of 64 calls.
● When a station without automatic queuing originates an ARS call, the caller hears reorder
tone if all routes are busy; the call can then be queued manually.
Calling Restrictions: Outward Restriction and Toll Restriction, when administered, prevent calls
from routing via ARS in a manner similar to directly accessing a trunk or pool. Pooled facility
access restrictions do not apply. In fact, the recommended arrangement to ensure that users make
maximum use of ARS is to block dial access to most trunk groups, so that users must dial the ARS
access code to place calls.
Direct Facility Access Button: Multiline voice terminal users who have pressed FACILITY to
activate the busy-to-idle reminder must wait until all queued ARS users have been serviced.
Interexchange Carrier (IXC): Calls cannot be dialed via ARS from any station.
Tie Trunks: Immediate Dial tie trunks should not be used in ARS routing patterns.
Virtual Facilities: Virtual Facilities may be used in place of trunk groups in ARS routing patterns.
When used with ARS, a digit translation scheme may be associated with each virtual facility. See
the “Virtual Facilities” feature description for more information.
Administration Requirements
System:
● Specify your area code (HNPA).
● Specify whether “Dial 1” is needed for calls outside of your area code. (This requirement is
ignored for the 10-digit dial plan.)
November 1995
2-61