Hardware Configurations
2-1Multi-Carrier Cabinet
2
DEFINITY Enterprise Communications Server Release 7
Maintenance for R7r
555-230-126
Issue 4
June 1999
2
Hardware Configurations
The DEFINITY System supports a variety of configurations consisting of a PPN
and up to 21 EPNs. In addition, the system may use a Center Stage Switch (CSS)
consisting of one or two Switch Nodes. This chapter describes the PPN and EPN
cabinets, and the configuration of carriers and circuit packs within these
cabinets.
Multi-Carrier Cabinet
The Multi-Carrier Cabinet (J58890A) accommodates from one to five circuit pack
carriers, and is always used for the PPN. EPNs may use either multicarrier
cabinets or single-carrier cabinets.
The power unit in the bottom of the MCC cabinet supplies AC voltage or DC
voltage from an external source to the power supply in each carrier. The AC
powered cabinet optionally contains a battery charger and backup batteries to
provide temporary power to the cabinet if the external source fails. The backup
unit is optional for systems powered from an Uninterruptible Power Supply (UPS).
The fan unit in the middle of the cabinet cools the carriers. AC-powered cabinets
have two 120V AC receptacles in the back for use as an AC power source. These
can be used to power the G3-MT.
Each cabinet must be connected to one of the following dedicated power
sources:
■ 120V AC 60 Hz at 50A from a National Electrical Manufacturing
Association (NEMA) 5-50R power outlet or equivalent
■ Single phase 240V AC, or three phase 208V AC, 60 Hz at 30A from a
NEMA L 14-30R power outlet or equivalent
