Bosch Appliances 3.5 manual 18LBB4433/00 Call Station Kit, 18.1Introduction, 1: Block diagram

2011-02 Installation and User Instructions 5 Call Stations

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18LBB4433/00 Call Station Kit

18.1Introduction

The LBB4433/00 Call Station Kit contains a printed circuit board (PCB) that can be used to make custom-made call stations (e.g. an emergency call station). This call station contains a built-in limiter and speech filter for improved intelligibility. See figure 18.1 for a block diagram of the call station kit.

Headset

Microphone

A/D

PTT

I

Control Inputs

POF

POF

Keypad

D/A

Network

Processor

+

DSP

O

Network

Redundancy

Switching

Keypad

(max. 16)

Power/Fault (2)

Call Status

System Status (2)

figure 18.1: Block diagram

Bosch Security Systems 2011-02