Networking Solutions

Automatic Route Selection

Automatic Route Selection routes public network calls on the most desirable (usually the most economical) trunking facilities available on your DEFINITY ECS when the call destinations are accessible through your public network.

DEFINITY ECS supports up to 640 routing patterns. Each routing pattern consists of up to 16 routing preferences (types of facilities) set up in the order you want them checked when a call is placed. Typically, the least expensive facility will be first on the list; the most expensive will be last.

If Generalized Route Selection is not being used when a call is made, the system selects a routing pattern based on the digits dialed. The routing preferences in that pattern are checked in the order they were listed, and the first available facil- ity is used to place the call. If a facility is not available, the call can be queued until a facility becomes available.

Automatic Alternate Routing

Automatic Alternate Routing enables you to ensure that private network calls will be routed over the various trunking facilities available in your private network in the most effective manner possible. As with Automatic Route Selection, you set up various patterns for routing calls — in this case, with the private network. Depending on your DEFINITY ECS configuration, you can have up to 640 routing patterns. Each pattern includes a primary preference — the most preferred and direct route — and 15 alternate preferences. If the primary preference in a pat- tern is unavailable, the system searches the alternate preferences in the speci- fied order until it finds one available.

Additional Network Feature Path Replacement

This feature allows active calls to be re-connected in order to obtain a more effi- cient connection. This is done via QSIG Supplementary Service Call Transfer.

Look Ahead Routing

DEFINITY ECS tries again to route an outgoing ISDN-PRI call if the call has been rejected from an ISDN trunk due to congestion. This feature allows you to admin- ister alternate routing preferences or to specify if the original path should be tried again.

Subnetwork Trunking

Subnetwork trunking is an Automatic Alternate Routing/Automatic Route Selec- tion function that typically converts an on-network (private network) number to a public network number (based on patterns and preferences) for off-network rout- ing. It can also convert a public network number to a private network number.

12-4Issue 5 January 1998

555-230-024

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Lucent Technologies 555-230-024 manual Automatic Route Selection, Automatic Alternate Routing, Look Ahead Routing