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