Nortel DCT1900 Technical Product Manual page 191

C 7
HAPTER
Cell Link Unit (CLU) – REX-BRD0014 or ROFNB 157 11/2
7.1 General
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):
CLU Firmware, Board Controller - RYT/ROFNB 157 11/2
Two 1 AT fuses for each Base Station circuit (see Figure 7–1)
7.2 Board 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
Base Station Power
The power connector does not have a polarity. It makes no difference which pin becomes plus or
minus.
LEDs
LED1 Green
LED2 Red
LED3 Red
LED4 Red
Install-DCT1900/R8/mw
© 2000-2005
Installation Instructions, Cell Link Unit (CLU) – REX-BRD0014 or ROFNB 157 11/2
: To connect Base Station 1 to 8.
: To connect -48 Volts from the MCCB for powering the Base
Stations.
: Normally on. Power On LED
: Normally off. Watch–dog LED
: Normally off. Board not polled LED
: Normally off. Base Station in NEW state or board error
Technical Product Manual - DCT1900
7-1