DATA BULLETIN
MX663
Call Progress Decoder
PRELIMINARY INFORMATION
Features
•
Worldwide Call Progress Tone Decoding:
Single and Dual Tones
Fax and Modem
Answer/Originate Tones
SIT (Special Information Tones)
Fast ‘US Busy’ Tone Detector
•
Adjustable Detection Threshold
•
Voice Detector
•
Low Power 3.3V/5.0V Operation
Applications
•
Call Progress Monitoring
Automatic Call Placement
•
Machine Dialing
•
Fax Tone Detection for Line Switching
MX663
CALL PROGRESS DECODER
LINE INTERFACE
µC
DTMF
CODEC
RINGING CURRENT
GENERATOR/
DETECTOR AND
LINE REVERSAL
DETECTOR
AUDIO
PROCESSING
KEYBOARD
AND DISPLAY
DRIVER
The MX663 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 dialing or automatic call
placement. The MX663 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 MX663 uses digital signal processing techniques to provide these advantages. It is a low cost, low power
product with superior performance. The MX663 may be used with a 3.0 to 5.5 volt supply and is available in
the following packages: 16-pin SOIC (MX663DW) or 16-pin PDIP (MX663P).
© 1999 MX-COM Inc.
www.mxcom.com Tele: 800 638-5577 336 744-5050
Fax: 336 744-5054
Doc. # 20480165.003
4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA
All trademarks and service marks are held by their respective companies.
CMLMICRO [ CML MICROCIRCUITS ]
