Administrator's Guide

Automatic routing — general
Issue 5 October 2002 1501555-233-506
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 CO, FX, ISDN, Tie, and WATS. See
‘‘Managing trunks’’ on page 411 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.