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FX633P1

Call Progress Tone Detector

CML Microsystems Plc 

1.0 Features

CML Semiconductor Products

Call Progress Tone Detector FX633

D/633/3 March 1996

Provisional Issue

• Worldwide Tone Compatibility

• Single and Dual Tones Detected

• Special US Busy-Detect Output

• Special Voice-Detect Output

• Wide Dynamic Signal Range

• Low Voltage Operation

• Standard 8-Pin DIP Package

• Standard 3.58MHz Xtal

1.1 Brief Description

The FX633 detects the audible tone signals used by most of the world's Telecom Systems to indicate

Dial, Ringing, Busy and other conditions found when placing a call. Detection of these call progress

stages is essential to the proper operation of automatic calling products.

The FX633 adds new features to Call Progress monitoring. It detects and indicates separately the "US

Busy" tones, reducing the need to measure "tone cadence" to identify "US Busy". It detects and

separately indicates "Voice" and other signals from Call Progress tones, reducing voice-falsing and

adding voice-answer as a connection prompt.

The FX633 uses the latest signal processing techniques to provide these advantages. It is a low cost,

low power product with superior performance. It is available in the industry standard package.

© 1996 Consumer Microcircuits Limited

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