Lucent Technologies 555-661-150 manual Routing for Outside Calls

MERLIN LEGEND Communications System Release 6.1	Issue 1
Network Reference 555-661-150	August 1998
2 Call-Handling Scenarios
Network Configuration Scenarios	Page 2-85

Routing for Outside Calls

This topic examines routing for hypothetical outside calls, to show how the system managers in Scenario 4 maximize cost benefits from the private network. As you study the example call routes in Table 2–22, page 2-86, review the general setup as described in Table 2–20, page 2-82 and Table 2–21, page 2-84.

Note the following facts about routing for outside calls in this scenario:

■Local calls made from System H go out over PSTN trunks connected to System E, in a different area code. Although System H users do make local calls, most of their calls are within the private network for this operations site. ARS allows the prepending of the local 703 area code.

■System E, as the hub, has separate trunk pools for tandem PRI and tandem tie trunks connected to different systems. They are used for non- local extension calling as well as routing of outside incoming and outgoing calls.

■When a video workstation user on System G must call a video extension on another private network system, the call is made as a toll call and is routed at 128 kbps over the local BRI facilities. In this scenario, such a call could be as a dial-plan routed call to either System E or System F. Even a call destined for System E could be made to System F, then routed to System E.

■All systems share the centralized VMS/AA on System E.

■When the Night Service is activated in System F, G, or H, and on trunks programmed to ring into calling groups, the call is routed to the centralized VMS/AA on System E.