Lucent Technologies Release 6 manual 1145B Power Supply

DEFINITY Enterprise Communications Server Release 6	Issue 5
Installation and Test for Multi-Carrier Cabinets 555-230-112	May 1998

5Install and Wire Telephones and Other Equipment

1145B Power Supply Page 5-45

1145B Power Supply

The 1145B closet power arrangement provides an uninterruptible -48 VDC power source with battery and 1145B distribution unit for ISDN/DCP, terminal equipment, adjuncts, and other customer-supplied equipment. During AC power interruptions, batteries automatically provide power to the load.

A manual switch on the distribution unit allows the user to redirect reserve power to outputs 1 through 32 so all outputs are provided battery reserve power.

NOTE:

The switch must be set to the 1-32 position.

The 1145B/1146B is a -48V power supply with 200 Watts total output. Each output circuit is current limited by a thermistor that limits the maximum output to 12 Watts. Each 1145B output has an LED to indicate the status of the thermistor. If the LED is on, the thermistor has a short on that power pair.

Not all outputs can simultaneously provide 12 Watts. The average power per output cannot exceed 6.25 Watts (200/32 = 6.25). The 1145B is designed to power one ISDN terminal or DCP adjunct per output. The maximum number of terminals or adjuncts is 32. The 1145B is required for installations outside the United States.

Auxiliary power (local or bulk) is always required for the following:

■Attendant Console 302C

■Any 8520 terminal

■Any 7500- or 8500-series terminal with an asynchronous data module

■Any 7500-series terminal whether in passive bus, or point to point (1 per BRI port)

■Any 8510 terminal in passive bus or with an asynchronous data module (unless the 8510 will not be used to support data or video)

■PassageWay adapter interface

■Any 8400-series terminal

■Any 7400-series terminal

Figure 5-20 shows how the standard power supply and wall-mounting plates fit together. Figure 5-21 shows the expanded power supply components (power distribution unit and “T” cable).