Nortel DCT1900 Technical Product Manual page 199

C 9
HAPTER
Speech Link Unit (SLU) – REX-BRD0015 or ROFNB 157 16/1
9.1 General
The SLU is a combination of an SPU and a CLU on one board. The CLU part is used to control up
to 8 Base Stations via twisted pair cables with a maximum length of 1.3 miles. The SPU section
has 8 speed circuits.
Maintenance
The SLU contains the following field–exchangeable parts (see Figure 9–1):
SPU Firmware, Board Controller - RYSNB 101 20
CLU Firmware, Board Controller - RYSNB 101 19
SPU-S DSP Firmware, Board Controller - REX-SW0013 or RYS 105 446
9.2 Board Description
Straps
Not applicable.
Connectors
The CLU part has 8 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
SPU part:
LED1 Green
LED2 Red
LED3 Red
LED4 Red
CLU part:
LED1 Green
LED2 Red
LED3 Red
LED4 Red
Install-DCT1900/R8/mw
© 2000-2005
Installation Instructions, Speech Link Unit (SLU) – REX-BRD0015 or ROFNB 157 16/1
: To connect Base Station 1 to 8.
: To connect -48 volts from the MCCB for powering the Base
Stations.
: Normally on. Power On LED SPU
: Normally off. Watch–dog LED SPU
: Normally off. Board not polled LED SPU
: Normally off. Board Error LED SPU
: Normally on. Power On LED CLU
: Normally off. Watch–dog LED CLU
: Normally off. Board not polled LED CLU
: Normally off. Base Station in NEW state or board error CLU
Technical Product Manual - DCT1900
9-1