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

© 2000-2005

 

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