Automatic route selection is a
private branch exchange
A business telephone system is a multiline telephone system typically used in business environments, encompassing systems ranging in technology from the key telephone system (KTS) to the private branch exchange (PBX).
A business telephone syst ...
(PBX) feature that allows a system to
route
Route or routes may refer to:
* Route (gridiron football), a path run by a wide receiver
* route (command), a program used to configure the routing table
* Route, County Antrim, an area in Northern Ireland
* ''The Route'', a 2013 Ugandan film
* Ro ...
a telephone call over the most appropriate
carrier
Carrier may refer to:
Entertainment
* ''Carrier'' (album), a 2013 album by The Dodos
* ''Carrier'' (board game), a South Pacific World War II board game
* ''Carrier'' (TV series), a ten-part documentary miniseries that aired on PBS in April 20 ...
and service offering based on factors such as the type of call (i.e., local, local long distance, etc.), the user's
class of service (CoS), the time of day, and the day of the week (e.g., workday, weekend, or holiday).
ARS can be used to route the landline leg of a call through a cellular network, if it offers lower rates. ARS is of greatest value in a
liberalized or
deregulated telecom environment where there are multiple competing carriers and rate plans available. ARS generally uses a lookup table rather than
parsing a hierarchy of dialed telephone numbers and calculating a least cost route.
ARS is also known as
Least-cost routing (LCR).
References
Your Dictionary
Telecommunications engineering