CML CMX683
The CMX683 is a general purpose Call Progress tone detector for use in monitoring the progress of calls in Public Switched Telephone System (PSTN) applications. The CMX683 uses advanced digital techniques to characterise valid Call Progress tones, unwanted tones, line noise and voice or music signals. The response time of the CMX683 allows it to operate with almost any Call Progress system.| Part No. | CMX683 |
|---|---|
| Datasheet | CMX683 Download |
| Manufacturer |  CML |
| Description | Call Progress and Voice Detector |
| Buy | Stock & Price |
FEATURES
● Detects Single and Dual Call Progress Tones● Worldwide Call Progress Tone Compatibility
● "Voice" Detect Outputs (Fast and Slow)
● Wide Dynamic Range with Low Falsing
● Low Power Operation: 600µA at 3.0V typ.
● 3.58MHz Xtal/Clock Oscillator CMX683 Call Progress and "Voice" Detector Provisional Issue
APPLICATIONS
● Worldwide Payphone Systems● Telephone Redialling Systems
● Dialling Modems
● Banking and Billing Systems
● Telecom Test Equipment
● Telecom Security Systems 1. Brief
DESCRIPTION
Dial Tone, Ringing, Busy and Not Available states can be distinguished by using the host µC to qualify the cadence of the CP DETECT output. In contrast to Call Progress detection devices based on simple filtering techniques, the CMX683 offers excellent sensitivity coupled with low false detection rates. In particular the ‘stuttered dial tone’ of voice mail messaging systems is supported. The use of statistical processing techniques, which analyse signal frequency, duration and amplitude, enable the CMX683 to distinguish voice or music activity from DTMF or Call Progress signals.
