FX663D4 View Datasheet(PDF) - CML Microsystems Plc
Part Name
Description
MFG CO.
'FX663D4' PDF : 17 Pages View PDF
CML Semiconductor Products
Call Progress Decoder
FX663
1.0 Features
• Decodes Call Progress Tones
Worldwide covering:
• Single and Dual Tones
• Fax and Modem
Answer/Originate Tones
• Special Information Tones
• Fast 'US Busy' Tone Detector
D/663/3 January 1999
Provisional Issue
• Low-Power (3 Volt) Operation
• Adjustable Detection Threshold
• Voice Detector
• Standard 3.58MHz Xtal/Clock Input
• 16-Pin SOIC and DIP Packages
1.1 Brief Description
The FX663 decodes the standard audible tone signals provided by telecom systems worldwide to indicate Dial,
Ringing, Busy, Unobtainable and other stages of a call attempt. It provides the key features needed for
intelligent, full-function, call progress monitoring by applications involving machine dialling or automatic call
placement. The FX663 also incorporates the following features:
• Single and dual tone decoding for better cross-system Call Progress monitoring.
• "US Busy" tone detector, saving time needed for "cadence verification" under Busy and Unobtainable
conditions. This incorporates a separate 620Hz detector for improved response.
• A detector to indicate speech and non-call progress signals; this reduces voice falsing of call progress
tones and adds Voice-Answer detection as a "connected" prompt.
• A fax and modem tone decoder.
• A separate, adjustable threshold, signal-level detector which reduces noise falsing.
The FX663 uses new digital signal processing techniques to provide these advantages. It is a low cost, low
power product with superior performance. It is available in industry standard 16-pin packages.
© 1999 Consumer Microcircuits Limited
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