Lucent Technologies 555-230-024 Automatic Routing Features

Features

555-230-024

A-2 Issue 5 January 1998

Automatic Routing Features

DEFINITY ECS provides a variety of automatic-routing features for public and pri-

vate networks. Automatic Alternate Routing (AAR) and Aut omatic Route Selection

(ARS) are the foundation for these automatic-routing features. They route calls

based on the preferred (normally the least expensive) route availabl e at the time

the call is placed. Generally, AAR routes calls over a pr ivate network and ARS

routes calls using the public network numbering plan. However, both AA R and

ARS support public and private networks. You can use the other features listed in

this section when you use AAR and ARS.

Allows private network calls to originate and terminate at one or many locations

without accessing the public network. When you dial an acces s code and phone

number, AAR selects the most desirable route for the call and performs digit con-

version as necessary. If the first choice route is unavailable, another route is cho-

sen automatically.

The numbers you call using AAR are normally private-ne twork numbers.

However, you can call a public-network number, a service code, a n international

number, operator access code, or an operator-assisted dialing number. With

AAR and Subnet Trunking, you have a convenient way to place in ternational calls

to frequently-called foreign cities. Such calls route as far as possibl e over the

private network, and then access the public network. This saves toll charges and

allows you to use your private network as much as possible .

ARS selects carriers automatically and routes calls inexpen sively over the public

network. When there are one or more long-distance carriers and wide-area te le-

communications services (WATS) provided, DEFINITY ECS selects the most pre-

ferred route for the call. Long-distance carrier-code dialin g is not required on

routes selected by the system. You assign long-distance ca rrier-codes and

DEFINITY ECS translates them. The system inserts codes as needed to guaran-

tee automatic-carrier selection. ARS can route calls to a variety of types-of-num-

bers and access a variety of types of trunk groups.

DEFINITY ECS supports overlap sending for AAR and ARS calls that are routed

over ISDN-PRI trunk groups. ISDN-PRI call-address information is sent one digit

at a time instead of in one block. In countries with complex public-netwo rk num-

bering plans, this allows for a significant decrease in call setup time. Whe n over-

lap receiving is enabled, this is especially significant for t andemed calls.