Lucent Technologies MERLIN LEGEND Release 6.0 Network Reference Manual page 135

MERLIN LEGEND Communications System Release 6.0
Network Reference 555-660-150
2 Call-Handling Scenarios
Network Configuration Scenarios
Scenario 5: Large System Hub
In this scenario, two MERLIN LEGEND Communications Systems are linked to a
hub DEFINITY ECS or DEFINITY ProLogix Solutions system in a star
configuration. Rather than repeating points made in earlier scenarios, this section
concentrates on the unique features of the Scenario 5 configuration.
on page 2–77
NOTE:
DEFINITY ECS or DEFINITY ProLogix Solutions features and operations
are beyond the scope of this guide. This scenario discusses the network
from the MERLIN LEGEND Communications Systems' perspective.
Note the following general facts about this network:
The systems are located in two different time zones.
Only tandem PRI facilities connect the systems.
The configuration takes advantage of the greater line/trunk capacity of the
hub system. Systems O and N primarily use outside PSTN facilities
connected to System A (DEFINITY ECS or DEFINITY ProLogix Solutions).
The system manager at System O is the coordinating system manager for
the network. Any changes at local systems are cleared through this person,
who ensures that the changes do not interfere with network operations. If
changes at one system require changes at other systems as well, the
System O manager sees that the proper modifications are made and that
system forms are updated accordingly.
Systems O and A are located on the same corporate campus. System O
serves the corporation's data processing and back office operations and
transfers data to and from the System A headquarters system.
Because System O is located in the same building as System A, all its calls
are routed via the network. The System O loop-start line is used only in the
event of a power failure. The tandem PRI trunks are assigned to System
O's main pool. When a Special Numbers call is made, the system
automatically prepends the ARS access code of System A. Emergency 911
and information 411 calls can reach the correct local services.
shows how the system is arranged.
2
Issue 1
February 1998
Page 2-75
Figure 2–6