
| DEFINITY Enterprise Communications Server Release 8.2 | Issue 1 | ||
| Overview | April 2000 | ||
| System Overview |
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| Hardware | 3 | ||
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whether the system is being duplicated for enhanced reliability. Each carrier can reside in the PPN cabinet or an EPN cabinet. One switch node can accommodate up to 15 Expansion Port Networks.
Fiber Link Administration
Port cabinets are connected via direct fiber links or through fiber links to a Center Stage Switch to provide the connections required for voice and data information transfer. The CSS is composed of switch node carriers that are interconnected by fiber links. It provides both
Carriers and Cabinets
Carriers are enclosed shelves composed of vertical slots that hold circuit packs. Circuit packs make up the logic, memory, and switching circuitry for the system. Port circuit packs connect to telephones, computers, and communications lines. The carriers are designed to accept any type of port circuit pack in each circuit pack position.
Each cabinet contains at least one carrier. The circuit packs fit into connectors attached to the rear of the slots. Every connector is connected to signal buses and power supplies in the cabinet.
The cabinets also house equipment that supplies power backup, ringing signal voltage, and mass storage for software translations.
There are three types of cabinets
■Compact Modular Cabinet. (CMC)
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Compact Modular Cabinets
The Compact Modular Cabinet (CMC) is a small, wall- or