CN201063686Y

CN201063686Y - Program controlled exchange subscriber line signal detector

Info

Publication number: CN201063686Y
Application number: CN 200720032105
Authority: CN
Inventors: 和康元; 吴贵臣
Original assignee: National Time Service Center of CAS
Current assignee: National Time Service Center of CAS
Priority date: 2007-06-22
Filing date: 2007-06-22
Publication date: 2008-05-21
Anticipated expiration: 2017-06-22

Abstract

A subscriber line signal detector for a program-controlled exchange, comprising: a single-chip computer circuit for controlling the whole machine, an off-hook and on-hook circuit with an input terminal connected to the single-chip computer circuit, an input terminal connected to the off-hook and on-hook circuit, and an output terminal connected to the single-chip computer The ring detection circuit of the circuit, the input terminal is connected with the off-hook and on-hook circuit, the output terminal is connected with the signal tone detection circuit of the single-chip computer circuit, the input terminal is connected with the off-hook and on-hook circuit, and the output terminal is connected with the single-chip computer circuit caller display circuit. The utility model combines the functions of off-hook and on-hook operation, signal tone identification and caller display demodulation into one, and under the control of the single-chip computer circuit, it detects the ringing signal, performs off-hook and on-hook operations, and judges dial tone and busy tone. , Ring back tone signal and can demodulate caller ID signal. It has the advantages of complete functions, simple circuit, reliable operation, etc., and can be popularized and used in digital communication of telephone exchange network or remote control equipment of telephone exchange network.

Description

Stored-program control exchange subscriber line signal detector

Technical field

The utility model belongs to the cable communicating technology field, is specifically related to stored-program control exchange subscriber line signal detector.

Background technology

Stored-program control exchange subscriber line signal detector is a public switched telephone network (PSTN) telephone terminal equipment, is used for the program controlled telephone switching network and carries out digital communication or the switched telephone network remote control equipment device to convertor user line input and demodulation.

The convectional signals of stored-program control exchange subscribers feeder has bell signal, dialing tone, busy tone, ring-back tone and dialing number information, i.e. caller identification, caller identification comprise the moon, day, time, calling telephone number.It is a lot of to be used for the subscriber line signal checkout gear at present, but function is all more single, and the device that has can only detect bell signal and judge signal tone, i.e. dialing tone, busy tone, ring-back tone, and the device that has then can only demodulation caller identification signal.

Summary of the invention

Technical problem to be solved in the utility model has been to overcome the shortcoming of above-mentioned subscriber line signal checkout gear function singleness, provides that a kind of function is complete, circuit is simple, the stored-program control exchange subscriber line signal detector of reliable operation.

Solving the problems of the technologies described above the technical scheme that is adopted is that it comprises: the monolithic computer circuit that complete machine is controlled; Off-hook on-hook circuit, the input order sheet computer circuits of this circuit; Ring detecting circuit, the input termination off-hook on-hook circuit of this circuit, output order sheet computer circuits; The signal tone testing circuit, the input termination off-hook on-hook circuit of this circuit, output order sheet computer circuits; The caller identification circuit, the input termination off-hook on-hook circuit of this circuit, output order sheet computer circuits.

The utility model is combined as a whole phone off-hook, on-hook operation, signal tone identification, caller identification demodulation function, under the control of monolithic computer circuit, detect bell signal, carry out off-hook, on-hook operation, judge dialing tone, busy tone, ringing tone signal and can demodulation caller identification signal, overcome the shortcoming that existing subscriber line signal checkout gear can only the detection signal sound or can only the demodulation caller identification.The utlity model has advantages such as function is complete, circuit simple, reliable operation, can on switched telephone network digital communication or switched telephone network remote control equipment, promote the use of.

Description of drawings

Fig. 1 is an electrical principle block diagram of the present utility model.

Fig. 2 is the electronic circuit schematic diagram of an embodiment of the utility model.

Embodiment

Below in conjunction with drawings and Examples the utility model is further described, but the utility model is not limited to these embodiment.

Fig. 1 is an electrical principle block diagram of the present utility model, referring to Fig. 1.In Fig. 1, the utility model is to be connected and composed by off-hook on-hook circuit, ring detecting circuit, signal tone testing circuit, caller identification circuit, monolithic computer circuit.The output termination ring detecting circuit of off-hook on-hook circuit, signal tone testing circuit, caller identification circuit, the output order sheet computer circuits of ring detecting circuit, signal tone testing circuit, caller identification circuit, the output termination off-hook on-hook circuit of monolithic computer circuit.

Off-hook on-hook circuit carries out off-hook or on-hook operation to the stored-program control exchange subscriber's telephone line under the control of monolithic computer circuit.When off-hook on-hook circuit is in hook state under the control of monolithic computer circuit, disconnect between signal tone testing circuit and the off-hook on-hook circuit, ring detecting circuit is connected with off-hook on-hook circuit with the caller identification circuit.When off-hook on-hook circuit is in off hook state under monolithic computer circuit control, be connected disconnection between ring detecting circuit and caller identification circuit and the off-hook on-hook circuit, be connected between signal tone testing circuit and the off-hook on-hook circuit.

Ring detecting circuit can detect having or not bell signal on the telephone wire by off-hook on-hook circuit during hook state, and gives the monolithic computer circuit testing result, and the caller identification circuit can receive the caller id information on the telephone wire.When bell signal occurring on the telephone wire, the monolithic computer circuit receives the bell signal that ring detecting circuit is sent here, and receives the moon, day, time, calling telephone number information that the caller identification circuit is sent here between first ring and rising tone ring.The monolithic computer circuit is controlled off-hook on-hook circuit and is carried out the off-hook operation after detecting predefined ringing number, the signal tone testing circuit begins to receive the signal tone on the telephone wire, and dialing tone, busy tone, ring-back tone be converted to different length and pulse signal at interval, give the monolithic computer circuit, tell dialing tone, busy tone or ringing tone signal by the monolithic computer circuit.

In Fig. 2, the off-hook on-hook circuit of present embodiment is connected and composed by socket J1, relay R LY1, triode Q1, triode Q2, triode Q3, diode D2, diode D5, diode bridge D6, transformer T1, resistance R 6, resistance R 7, resistance R 8, capacitor C 6.Telephone signal is by socket J1 input, and 1 pin of socket J1 connects P01 end and ring detecting circuit and the caller identification circuit that the elementary end of transformer T1 and ring detecting circuit, 2 pin are succeeded electrical equipment RLY1.1 pin of another termination diode bridge D6 that transformer T1 is elementary, a termination signal tone testing circuit, the other end ground connection of T1 level of transformer.The end that 4 pin of diode bridge D6 connect capacitor C 6 connects the base stage of triode Q3 by resistance R 7 and connects the negative pole of the collector electrode of triode Q3 and triode Q2 and diode D5 and connect the base stage of triode Q3, the P02 end that 3 pin are succeeded electrical equipment RLY1 by resistance R 8 by emitter, 2 pin that resistance R 6 meets triode Q2.The base stage of another termination triode Q3 of the positive pole of diode D5 and capacitor C 6.The emitter of triode Q3 connects the base stage of triode Q2.The negative pole of the positive pole of one terminating diode D2 of relay R LY1 coil and the emitter of triode Q1, the other end and diode D2 connects positive source, the base stage order sheet computer circuits of triode Q1.

The ring detecting circuit of present embodiment is connected and composed by integrated circuit U1, diode D1, diode D3, diode D4, resistance R 1, resistance R 4, capacitor C 1, and integrated circuit U1 is that the photoelectrical coupler model is 4N25.2 pin of one termination socket J1 of capacitor C 1, the other end connect 1 pin of integrated circuit U1 and the negative pole of diode D1 by resistance R 1,2 pin of integrated circuit U1 connect positive pole, the 4 pin order sheet machine circuits of diode D1 and diode D3 and pass through resistance R 4 ground connection, the negative pole of diode D3 connects the negative pole of diode D4, and circuit is reconciled in 1 pin of the anodal combination hub J1 of diode D4 and caller identification.

The signal tone testing circuit of present embodiment is connected and composed by integrated circuit U2, resistance R 5, capacitor C 2～capacitor C 5, and the model of integrated circuit U2 is LM567.One end of T1 level of one termination transformer of capacitor C 2,3 pin of another termination integrated circuit U2,1 pin of integrated circuit U2 connects an end of capacitor C 3, a end that 2 pin connect capacitor C 4, a end that 6 pin connect capacitor C 5 and connects the other end, the 8 pin order sheet computer circuits that 5 pin, 7 pin connect capacitor C 5, the other end of another termination capacitor C 4 of capacitor C 3 by resistance R 5.

The caller identification circuit of present embodiment is connected and composed by integrated circuit U4, resistance R 2, resistance R 3, resistance R 9, capacitor C 7～capacitor C 9, and the model of integrated circuit U4 is MT88E39.2 pin of one termination socket J1 of resistance R 2, an end of another termination capacitor C 7,1 pin of another termination integrated circuit U4 of capacitor C 7,2 pin of integrated circuit U4 connect an end of capacitor C 8 and connect two ends that 3 pin, 5 pin and 8 pin connect capacitor C 9 respectively, 9 pin～13 pin by bus interface monolithic computer circuit by resistance R 9.

The monolithic computer circuit of present embodiment is made of integrated circuit U3, and integrated circuit U3 is that the monolithic computer model is 89C2051.8 pin of integrated circuit U3 connect 4 pin, 14 pin～18 pin of integrated circuit U1 by 9 pin～13 pin of bus interface integrated circuit U4,8 pin that 13 pin meet integrated circuit U2, the base stage that 12 pin meet triode Q1.

Operation principle of the present utility model is as follows:

Socket J1 is connected with fixed-line telephone network.The AC signalling signal voltage amplitude that stored-program control exchange is sent here is higher than diode D3, diode D4 puncture voltage, signal is imported by socket J1, contact P01, capacitor C 1, resistance R 1, diode D1, diode D3, diode D4 by relay resistance R LY1 get back to socket J1 formation loop, wherein flow through the signal voltage of diode D1 by integrated circuit U1 input IN+, IN-, because integrated circuit U1 coupling outputs to fracture P3.4 the integrated circuit U3 from 4 pin.Receive that integrated circuit U3 after this interrupt signal carries out the preparation of demodulation caller identification.Caller identification signal voltage amplitude between first ring and rising tone ring is much smaller than bell signal, diode D3, diode D4 can not be breakdown, be in open-circuit condition, the caller identification signal is by socket J1, resistance R 2, capacitor C 7, the IN+ of integrated circuit U4, IN-, capacitor C 8, resistance R 3 is got back to the loop that socket J1 forms, integrated circuit U4 demodulates the caller identification signal, the caller identification signal comprises the moon, day, time, calling number, and outputing to P1.2 to the P1.6 mouth line of integrated circuit U3 by 9 pin～13 pin of integrated circuit U4, integrated circuit U3 receives caller id information.After fracture P3.4 detects three rings among the integrated circuit U3, from P1.0 mouth output control signal, make triode Q1 conducting work, the contact of relay R LY1 is switched to P02, the utility model is in the off-hook operating state, the DC feedback electric current that stored-program control exchange is sent here is by socket J1, relay R LY1 contact P02, the constant-current source that diode bridge D6 and triode Q2, triode Q3, diode D5, capacitor C 6, resistance R 6, resistance R 7, resistance R 8 constitute, the elementary socket J1 that gets back to of the transformer T1 that flows through at last forms the loop.The program controlled telephone switching network has detected DC feedback electric current output and has promptly thought subscriber phone off-hook, send dialing tone or busy tone AC signal according to line conditions, it is elementary that AC signal is superimposed upon the transformer T1 that flows through on the DC feedback electric current, be coupled to secondaryly through T1, be input to the signal tone testing circuit of forming by integrated circuit U2 by capacitor C 2.The signal tone testing circuit length and at interval different AC signal be converted to the P1.1 mouth line that the different pulse signal of corresponding length and interval is delivered to integrated circuit U3, integrated circuit U3 makes judgement according to length, the interval of pulse signal, being that busy tone is then controlled on-hook, is that dialing tone then sends corresponding dialing instruction.

Claims

1. A program-controlled exchange subscriber line signal detector is characterized in that it comprises:

A single-chip computer circuit that controls the whole machine;

Off-hook and on-hook circuit, the input terminal of the circuit is connected with a single-chip computer circuit;

A ringing detection circuit, the input terminal of the circuit is connected to the off-hook and on-hook circuit, and the output terminal is connected to the single-chip computer circuit;

Signal tone detection circuit, the input terminal of the circuit is connected to the off-hook and on-hook circuit, and the output terminal is connected to the single-chip computer circuit;

The caller display circuit, the input terminal of the circuit is connected to the off-hook and on-hook circuit, and the output terminal is connected to the single-chip computer circuit.