DEFINITY Enterprise Communications Server Release 8.2 | Issue 1 | ||
Overview | April 2000 | ||
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System Overview |
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Hardware | 2 | ||
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Hardware
Though the primary components are the same, your DEFINITY ECS can vary widely in size and appearance, depending on your capacity requirements. It may be as small as a single
The DEFINITY system is essentially an arrangement of port networks and circuits that connect incoming to outgoing communications ports. Up to three port networks can be connected directly to each other. When there are more than three port networks, the connections are made through a Center Stage Switch.
Processor Port Network (PPN)
Every DEFINITY ECS has one Processor Port Network (PPN). It is often the only component in small systems. The PPN houses the Switch Processing Element.
The Switch Processing Element (SPE) contains the central processing unit, which supervises system operation. It also contains a mass storage system for loading system software and saving system translations.
Because your application requirements may vary widely, DEFINITY ECS has three types of SPEs available with proven capacities of 70,000 calls per hour, 140,000 calls per hour, and 250,000 calls per hour. The performance you realize will depend on the call processing, administrative, and maintenance activities in which your system is engaged.
Expansion Port Network (EPN)
Expansion Port Networks (EPNs) are used when the system grows beyond the capacity of a single port network or must serve geographically dispersed offices. EPNs provide additional ports as needed. A system can have up to 43 Expansion Port Networks.
Center Stage Switch (CSS)
The Center Stage Switch (CSS) is a connection hub that provides port network communication. It is an essential component of a DEFINITY ECS configuration if the system is composed of more than three port networks. Often it is incorporated into smaller configurations to allow for growth. The CSS consists of from one to three switch nodes. Switch nodes are composed of one or two switch node carriers, depending on
