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DEFINITY ECS Release 8.2
Administrator’s Guide
555-233-506
Issue 1
April 2000
Features and technical reference
1169Automatic routing — general
20
AAR
AAR routes calls over private networks. When a user dials the AAR feature access
code (normally 8 in North America) and phone number, AAR selects the least
expensive route for the call in the private network and performs any digit
conversion. If the first-choice route is not available, another route is chosen
automatically.
AAR routes private-network numbers, public-network numbers, service codes, an
international number, operator access code, or an operator-assisted dialing
number. AAR routes calls route as far as possible over the private network, and
then accesses the public network. This saves long-distance charges and allows you
to use your private network as much as possible.
ARS
ARS routes calls over the public network. When a user dials the ARS feature
access code (normally 9 in the US and 0 outside of the US) and phone number,
ARS selects the least expensive route for the call when there are one or more
long-distance carriers or services.
ARS, like AAR, routes private-network numbers, public-network numbers,
service codes, an international number, operator access code, or an
operator-assisted dialing number, and also routes to Inter-exchange carriers (IXC).
These are your long-distance providers.
You can route ARS calls to a variety of types of public-network and
private-network trunk groups including Central Office (CO), Foreign Exchange
(FX), Integrated Services Digital Network (ISDN), Tie, and Wide Area
Telecommunications Service (WATS). See ‘‘
Managing trunks’’ on page 337 for
more information.
AAR and ARS digit analysis default
translations
Your switch contains built-in AAR and ARS Digit Analysis Default Translations.
These default translations are used for call processing whether or not AAR or
ARS is enabled on your switch.
Any 7-digit dialed string that begins with any number 2 through 9 is processed as
an AAR call. Exceptions are listed in the ARS Digit Analysis Default Translations
Table. The translations shown on the ARS Digit Analysis Default Translations
table are displayed in sorted order (including additions) on each of the 8 possible
ARS Digit Analysis Tables.