Nortel Networks DCT1900 manual Cell Link Unit CLU REX-BRD0014 or Rofnb 157 11/2, Straps

Technical Product Manual - DCT1900

Installation Instructions, Cell Link Unit (CLU) – REX-BRD0014 or ROFNB 157 11/2

CHAPTER 7

Cell Link Unit (CLU) – REX-BRD0014 or ROFNB 157 11/2

7.1General

The CLU is used to control up to 8 Base Stations via twisted pair cables with a maximum length of 2.2 miles.

Maintenance

The CLU contains the following field–exchangeable parts (see Figure 7–1):

zCLU Firmware, Board Controller - RYT/ROFNB 157 11/2

zTwo 1 AT fuses for each Base Station circuit (see Figure 7–1)

7.2Board Description

Straps

Not applicable.

Connectors

The CLU has 4 connectors at the front by which the CLCs are connected to the Base Stations and

1 connector for input of the Base Station power:

CLC 1–8	: To connect Base Station 1 to 8.
Base Station Power	: To connect -48 Volts from the MCCB for powering the Base
	Stations.

The power connector does not have a polarity. It makes no difference which pin becomes plus or minus.

LEDs
LED1	Green	: Normally on. Power On LED
LED2	Red	: Normally off. Watch–dog LED
LED3	Red	: Normally off. Board not polled LED
LED4	Red	: Normally off. Base Station in NEW state or board error

Install-DCT1900/R8/mw	7-1
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