器件名称: CMX683
功能描述: Call Progress and "Voice" Detector
文件大小: 323.77KB 共13页
简 介:CMX683
CML Microcircuits
COMMUNICATION SEMICONDUCTORS
D/683/1 June 2002
Call Progress and "Voice" Detector
Advance Information
Features
Applications
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: 600A at 3.0V typ. 3.58MHz Xtal/Clock Oscillator
Worldwide Payphone Systems Telephone Redialling Systems Dialling Modems Banking and Billing Systems Telecom Test Equipment Telecom Security Systems
1.
Brief Description
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. Dial Tone, Ringing, Busy and Not Available states can be distinguished by using the host C to qualify the cadence of the CP DETECT output. The CMX683 uses advanced digital techniques to characterise valid Call Progress tones, unwanted tones, line noise and voice or music signals. In contrast to Call Progress detection devices based on simple filtering techniques, the CMX683 offers excellent sensitivity coupled with low false detection rates. The response time of the CMX683 allows it to operate with almost any Call Progress system. 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 mus……
