Lucent Technologies 555-661-150 manual Merlin Legend Communications System Release

MERLIN LEGEND Communications System Release 6.1	Issue 1
Network Reference 555-661-150	August 1998
2 Call-Handling Scenarios
Network Configuration Scenarios	Page 2-15

organizational needs and overall feature planning. This scenario also illustrates the way systems work when they are connected by tandem tie trunks only.

■Scenario 3: Four Systems in a Series, Tandem PRI Facilities, page 57. In this scenario, there is no hub system. Instead the systems are connected in a linear fashion. Three systems are joined by tandem PRI facilities. A fourth system is connected to one of the others by analog (E&M) tandem tie trunks. One of the systems has its own VMS/AA and the other three share a centralized VMS/AA. The system with the centralized VMS/AA is also called the VMS hub. (Release 6.1 or later is required for all systems sharing the centralized VMS/AA.)

■Scenario 4: Four Systems in a Star, Mixed Facilities, page 74. In this scenario, one system acts as the hub and has public-switched network trunks connected to its control unit, as do two other systems connected in a star configuration to the hub. The fourth system has only emergency PSTN trunks connected locally and normal calls are made using PSTN facilities connected to other systems. The systems are linked both by PRI and analog (E&M) tandem tie facilities. All of the systems share a centralized VMS/AA. The system with the centralized VMS/AA is also called the VMS hub. (Release 6.1 or later is required for all systems.)

■Scenario 5: Large System Hub, page 88. In this scenario, two MERLIN LEGEND Communications Systems are linked to a hub DEFINITY ECS or DEFINITY ProLogix Solutions system in a star configuration. Because this star configuration has a DEFINITY ECS or DEFINITY ProLogix Solutions system as the hub, it is not possible to configure a centralized VMS/AA.

NOTE:

DEFINITY ECS and DEFINITY ProLogix Solutions features and operations are beyond the scope of this guide. Scenario 5 discusses the private network from the MERLIN LEGEND Communications Systems perspective.

The scenarios vary according to the types of tandem trunks, applications, outside facilities, and private network configuration (series or star). They compare and contrast the following aspects of private networks, supplying both usage and setup information:

■Intersystem call-handling to and from extensions on remote networked systems

■ARS routing and calling via PSTN trunks connected to a remote networked system

■ARS routing and usage when local PSTN trunks are accessed by non-local users

■Remote access planning for non-local users calling out on local PSTN facilities