KR910010966A - Self Diagnosis Circuit of Simple Exchange Device - Google Patents

Abstract

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Description

Self Diagnosis Circuit of Simple Exchange Device

As this is a public information case, the full text was not included.

3, 4 and 5 are circuit diagrams of the external connector 100, the internal connector 200, and the tone generator / detector 300 of FIG.

Claims (1)

External connection portion 100 composed of ring sensing circuit 101, dial circuit 102, hybrid coil TT1, resistor R11-R13 and analog / digital and digital / analog converter 103, and power supply and closed circuit The internal connection unit 200 composed of the detection unit 201, the hybrid coil TT2, the resistors R21-R23, and the analog / digital and digital / analog converters 202, the oscillating capacitors C31, C32, and the resistors ( R31), tone generating circuit 301 for generating a tone source composed of variable resistors VR31, VR32, resistors R32, R33, and operational amplifiers OP31, OP32 for amplifying, The tone generating / sensing unit 300 comprising the tone detection circuit 302 configured by the filter 31 and the frequency detector 32 and outputting a detection signal, and the analog / digital and digital / analog converter 303; Transmit and receive high with analog / digital and digital / analog converters 103, 202, and 303 of the connection part 100, the extension connection part 200, the tone generating / detecting part 300 Thus, the voice signal exchange circuit 500 communicating with each other, the voice signal exchange circuit 500 and the address bus and the data bus are connected to each other, so as to receive the detected signals of the communication detecting circuit 302, and the external connection unit ( 100), the internal connection unit 200 and the tone generator circuit 301 and the self-diagnosis circuit of the simplified exchange device, characterized in that consisting of a system control unit 400 connected by a control bus. ※ Note: The disclosure is based on the initial application.