Nortel Networks DCT1900 manual Speech Link Unit SLU REX-BRD0015 or Rofnb 157 16/1, General

Technical Product Manual - DCT1900

Installation Instructions, Speech Link Unit (SLU) – REX-BRD0015 or ROFNB 157 16/1

CHAPTER 9

Speech Link Unit (SLU) – REX-BRD0015 or ROFNB 157 16/1

9.1General

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):

zSPU Firmware, Board Controller - RYSNB 101 20

zCLU Firmware, Board Controller - RYSNB 101 19

zSPU-S DSP Firmware, Board Controller - REX-SW0013 or RYS 105 446

9.2Board 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	: 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
SPU part:
LED1	Green	: Normally on. Power On LED SPU
LED2	Red	: Normally off. Watch–dog LED SPU
LED3	Red	: Normally off. Board not polled LED SPU
LED4	Red	: Normally off. Board Error LED SPU
CLU part:
LED1	Green	: Normally on. Power On LED CLU
LED2	Red	: Normally off. Watch–dog LED CLU
LED3	Red	: Normally off. Board not polled LED CLU
LED4	Red	: Normally off. Base Station in NEW state or board error CLU

Install-DCT1900/R8/mw	9-1
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