CN2922308Y - a telephone - Google Patents

Abstract

The utility model relates to a telephone set with a telephone line fault alarm function. In addition to the communication circuit, it also includes an alarm circuit composed of a signal rectification and detection circuit, a logic voice control circuit, a voice synthesis circuit, a driving amplifier circuit, and a power indicator circuit. The telephone can effectively monitor whether the telephone line is normal, and has the sound alarm function when the telephone line is short-circuited, disconnected, mixed-line and other faults, and promptly notifies the user to report the fault repair, so that the user can avoid various losses caused by line faults; It has few components, simple operation, convenient use, stable and reliable circuit, timely and accurate alarm, and effectively realizes the alarm of telephone line failure.

Description

a telephone

technical field

The utility model relates to a telephone set with a telephone line fault alarm function.

Background technique

With the continuous development of the communication industry, the telephone has become an indispensable contact method and office tool. However, due to the influence of various factors, faults such as short circuit, disconnection, and mixed lines often occur in the telephone line; the existing telephone line fault is generally reported to the telecommunications department after the user finds it, and the telecommunications department repairs it. It is a long process until the fault is found, and the user finds that the phone is broken only when the user uses the phone again, which generally takes half an hour to several hours. The telephone is an important office tool and contact tool for agencies, enterprises, units, and individuals. Once a telephone line failure occurs and the phone cannot be used normally, if the user cannot immediately know the failure, it will delay the normal development of the work and cause very serious damage. Consequences, especially for some industries and special places, such as banks, hospitals, fire safety, state agencies, and every family; in this regard, the telecommunications sector and telephone users hope to solve this problem, but it has not been solved; And do not find the product of telephone line fault alarm on the market at present.

Contents of the invention

The purpose of the utility model is to provide a telephone set to realize the purpose of automatic alarm when faults such as short circuit, disconnection, and mixed lines occur in the telephone line.

The purpose of this utility model is achieved in this way, to provide a telephone, it is characterized in that it also includes a signal rectification detection circuit, a logic voice control circuit, a voice synthesis circuit, a push amplifier circuit, and a power indicator circuit in addition to a communication circuit. alarm circuit; in the normal state of the telephone line, the DC voltage of the A3 and B3 lines of the signal rectification detection circuit connected to the telephone line is rectified by the diode rectification bridge 2CZ1-4, ensuring that the A line of the circuit is positive and the B line is negative , the +48V voltage on the circuit A line is limited and stepped down by the resistor R1, the Zener diode 2CW stabilizes the voltage, and forms a signal rectification detection circuit at the negative pole of the B line, and forms a voltage difference of about 5V at both ends of the Zener diode 2CW, and the capacitor C1 maintains a continuous voltage of about 5V at both ends of the Zener diode 2CW in the ringing state, and the positive pole of the Zener diode 2CW sends the 5V voltage to the logic voice control circuit, and then to the b pole to the e pole of the triode 3G1 to the negative pole of the power supply E through the resistor R2 , so that the triode 3G1 is turned on; the C pole of the triode 3G1 presents a logic low level, which is sent to the 2 pins of the voice chip 10535 of the speech synthesis circuit, so that the voice chip stops working and does not report to the police. When the telephone line failure occurs, the 5V voltage cannot be obtained at both ends of the Zener diode 2CW, the triode 3G1 of the logic control circuit is cut off, and the 2 pins of the voice chip 10535 of the voice synthesis circuit get the power supply E and send a high level through the resistor R4, Make the voice synthesis circuit work; pin 4 of the voice chip 10535 sends a high level to the triode 3G2 of the amplifier circuit, so that the triode 3G2 is turned on, forms a loop with the speaker Y and the power supply E, and drives the speaker Y to sound an alarm.

Due to the adoption of the above scheme, the DC voltage provided by the telephone line is used as the capture signal source. Once the line is short-circuited, disconnected, mixed-line and other faults, the alarm speaker will sound an alarm, so the user can be informed in time to take measures; The utility model telephone can effectively monitor whether the telephone line is normal, and immediately send out a sound alarm when a fault occurs, and promptly notify the user to report the fault repair, so that the user can avoid various losses caused by line faults, communication interruptions, and contact interruptions; this circuit Simple and reliable, without any impact on the telephone line, it can monitor the fault alarm of the telephone line day and night; at the same time, because it uses the DC voltage provided by the telephone line as the capture signal source, it can also realize the anti-theft alarm of the telephone line cable The purpose of the device; more importantly, it can be used by general users to alarm the fault of fixed telephone lines. It is easy to operate, easy to use, stable and reliable in circuit, timely and accurate in alarm, and can be widely used in agencies, enterprises, units, and individuals. Household and other places, and the installation is convenient, the lineman and the user can complete the installation by themselves.

Description of drawings

Fig. 1 is the principle block diagram of the warning circuit of the present utility model;

FIG. 2 is a schematic circuit diagram of the schematic block diagram shown in FIG. 1 .

Detailed ways

Accompanying drawing is embodiment of the utility model.

Below in conjunction with accompanying drawing and embodiment the utility model is further described.

In Fig. 1, 1 is a signal rectification detection circuit, 2 is a logic voice control circuit, 3 is a speech synthesis circuit, 4 is a driving amplifier circuit, 5 is a circuit such as a power supply indication; 0 is a telephone outside line.

The circuit principle diagram of the present utility model is provided by Fig. 2, and in Fig. 2, the alarm circuit that is made up of signal rectification detection circuit, logic voice control circuit, speech synthesis circuit, pushes amplifying circuit, power supply indicator circuit; <1> described The signal rectification detection circuit is composed of a diode rectification bridge 2CZ1-4 composed of 4 diodes, a resistor R1, a Zener diode 2CW, and a capacitor C1. On the one hand, it connects to the telephone line A2 of the telephone through lines A3 and B3 , B2 line connection, on the other hand connected with the logic voice control circuit; <2> the logic voice control circuit is composed of resistor R2, resistor R3, triode 3G1, it is connected to the signal rectification detection circuit on the one hand, and speech synthesis on the other hand circuit; <3> the speech synthesis circuit is composed of a voice chip 10535, on the one hand, it connects the logic voice control circuit through the 2 pins of the voice chip 10535, and on the other hand, connects the driving amplifying circuit through the 4 pins of the voice chip 10535; <4> promotes the amplifying circuit It is composed of resistor R6, transistor 3G2, and speaker Y. On the one hand, it is connected to the speech synthesis circuit, and on the other hand, it is connected to the power indicator circuit; <5>The power indicator circuit is composed of light-emitting diode 2CF, resistor R7, power supply E, and switch K. amplifier circuit connection.

In Fig. 2, between the A3 and B3 lines of <1> signal rectification detection circuit, there is a diode rectification bridge 2CZ1-4 in series, and the output ends of the diode rectification bridge 2CZ1-4 are respectively A and B lines; After the resistor R1 is connected in series, the zener diode 2CW and the capacitor C1 are sequentially connected in parallel between the A line and the B line, and the B line is directly connected to the negative pole of the power supply E; Resistor R2, a resistor R3 is connected in series between the base b of the triode 3G1 and the B line, the emitter e of the triode 3G1 is directly connected to the negative pole of the power supply E; <3> the collector c of the triode 3G1 is connected to the resistor R4 and the switch K sequentially After being connected in series with the power supply E3, the collector c of the triode 3G1 is directly connected to the speech synthesis circuit by pin 2 of the voice chip 10535, and the 9 pin of the voice chip 10535 is directly connected to the negative pole of the power supply E, and the collector c of the triode 3G1 is connected to the voice chip A resistor R4 and a resistor R5 are connected in series between the 3 pins of the 10535, a resistor R4 is connected in series between the collector c of the triode 3G1 and the 1 pin of the voice chip 10535, and a resistor is connected in series between the 4 pin of the voice chip 10535 and the negative pole of the power supply E R6; <4> Pin 4 of the voice chip 10535 is directly connected to the base b of the triode 3G2, a speaker Y is connected in series between the collector c of the triode 3G2 and the switch K, and the emitter e of the triode 3G2 is directly connected to the negative pole of the power supply E ; <5> The switch K, the light emitting diode 2CF, and the resistor R7 are connected in series between the positive and negative poles of the power supply E in sequence.

Circuit work process of the present utility model is as follows:

When the telephone line is normal, the circuit is static: the signal rectification detection circuit A3, B3 is connected to the telephone outside line access connection line A2, B2 of the telephone, and the telephone line is normal, A3, B3 line passes through 4 diode rectification bridge circuits 2CZ1-4 rectification, to ensure that the A line of the circuit is the + pole, and the B line is the first level. On the circuit A line, the voltage of about +48V is current-limited and stepped down by the resistor R1. In the rectification detection circuit, a voltage difference of about 5V is formed at both ends of the Zener diode 2CW. Capacitor C1 maintains a continuous voltage of about 5V at both ends of the Zener diode 2CW in the ringing state, and the positive pole of the Zener diode 2CW sends the 5V voltage to the logic The voice control circuit, through the resistance R2 to the b pole to the e pole of the triode 3G1 to the negative pole of the power supply E, makes the triode 3G1 conduction; the C pole of the triode 3G1 presents a logic low level, which is sent to the 2 pin of the speech synthesis circuit to make the voice chip 10535 stops working; the circuit is powered by power supply E.

When the telephone line has a fault such as mixed line, grounding, other mixed line, disconnection, etc., the line voltage changes and the circuit is in a dynamic state: the signal rectification detection circuit A3, B3 is connected to the telephone line access line A2, B2 of the telephone When the 48V voltage of the A and B lines changes, the 5V voltage cannot be obtained at both ends of the Zener diode 2CW, so that the triode 3G1 of the logic control circuit is cut off, and the 2 pins of the voice chip 10535 of the voice synthesis circuit get the power supply E and send it to the terminal through the resistor R4. Come to the high level to make the speech synthesis circuit start to work. Pin 4 of the voice chip 10535 sends a high level to the pole b of the triode 3G2 that drives the amplifying circuit, and the b pole receives the positive voltage of the voice chip 10535 to turn on the triode 3G2, and the negative pole passes through the e pole of the triode 3G2 to the speaker through the c of the triode 3G2 Y forms a loop to the positive pole of the power supply E, and the signal sent by the voice chip 10535 of the speech synthesis circuit is pushed, amplified and pushed to sound an alarm by the loudspeaker Y to complete the alarm purpose of the telephone line failure; the circuit is powered by the battery pack of the telephone as the power supply E, After the switch K is closed, the telephone line failure alarm starts to work, and is indicated by light-emitting diode 2CF.

The electronic components mentioned in the accompanying drawings of the specification are as follows:

Resistor: R1-R7 Capacitor: C1

Diode rectifier bridge circuit: 2CZ1-4 Zener diode: 2CW

LED: 2CF Transistor: 3G1-3G2

Voice chip: 10535 Speaker: Y

Power supply: E External power supply slot: E1

Switch: K

Claims (5)

1, a kind of telephone set, it it is characterized in that: further comprising the warning circuit of being made up of signal rectification testing circuit, logic voice control circuit, sound-compound-circuit, promotion amplifying circuit, power indicating circuit of forming except comprising communicating circuit;＜1〉bridge path rectification 2CZ1-4, resistance R 1, voltage stabilizing didoe 2CW, the capacitor C 1 be made up of 4 diodes of described signal rectification testing circuit formed, it is connected with outside line access line A2, the B2 line of telephone set by A3, B3 line on the one hand, links to each other with the logic voice control circuit on the other hand;＜2〉described logic voice control circuit is made up of resistance R 2, resistance R 3, triode 3G1, and it connects the signal rectification testing circuit on the one hand, connects sound-compound-circuit on the one hand;＜3〉sound-compound-circuit is made up of speech chip 10535, and it connects the logic voice control circuit by 2 pin of speech chip 10535 on the one hand, and 4 pin by speech chip 10535 connect the promotion amplifying circuit on the one hand;＜4〉promote amplifying circuit and be made up of resistance R 6, triode 3G2, loud speaker Y, it connects sound-compound-circuit on the one hand, connects power indicating circuit on the one hand;＜5〉power indicating circuit is made up of light-emitting diode 2CF, resistance R 7, power supply E, K switch, and it is connected with the promotion amplifying circuit.

2, telephone set according to claim 1 is characterized in that:＜1〉between the A3 of signal rectification testing circuit, B3 line, be in series with diode bridge rectification circuit 2CZ1-4, the output of diode bridge rectification circuit 2CZ1-4 is respectively A, B line; Behind the series resistance R1, voltage stabilizing didoe 2CW, capacitor C 1 are connected in parallel between A line and the B line in turn on the A line, and the B line directly links to each other with the negative pole of power supply E;＜2〉be in series with resistance R 2 between the base stage b of triode 3G1 and the resistance R 1, be in series with resistance R 3 between the base stage b of triode 3G1 and the B line, the emitter e of triode 3G1 directly links to each other with the negative pole of power supply E;＜3〉the collector electrode c of triode 3G1 links to each other with power supply E with resistance R 4, K switch back in sequential series, the collector electrode c of triode 3G1 directly links to each other with 2 pin of sound-compound-circuit by speech chip 10535,9 pin of speech chip 10535 directly link to each other with the negative pole of power supply E, in sequential series between the collector electrode c of triode 3G1 and 3 pin of speech chip 10535 have resistance R 4 and a resistance R 5, be in series with resistance R 4 between the collector electrode c of triode 3G1 and 1 pin of speech chip 10535, be in series with resistance R 6 between 4 pin of speech chip 10535 and the negative pole of power supply E;＜4〉4 pin of speech chip 10535 directly link to each other with the base stage b of triode 3G2, are in series with loud speaker Y between the collector electrode c of triode 3G2 and the K switch, and the emitter e of triode 3G2 directly links to each other with the negative pole of power supply E;＜5〉K switch, light-emitting diode 2CF, resistance R 7, in sequential series between the both positive and negative polarity of power supply E.

3, telephone set according to claim 1 and 2, it is characterized in that: under the telephone line normal condition, signal rectification testing circuit A3, the B3 line is through bridge path rectification 2CZ1-4, the A line that guarantees circuit is anodal, the B line is a negative pole, pact+48V voltage is through resistance R 1 current limliting step-down on circuit A line, voltage stabilizing didoe 2CW voltage stabilizing, form the signal rectification testing circuit to B line negative pole, and in the formation 5V left and right sides, voltage stabilizing didoe 2CW two ends voltage difference, capacitor C 1 keeps voltage stabilizing didoe 2CW two ends that lasting 5V left and right sides voltage is arranged under ringing condition, voltage stabilizing didoe 2CW positive pole is delivered to the logic voice control circuit with 5V voltage, through resistance R 2 to the b utmost point of triode 3G1 to e best power supply E negative pole, make triode 3G1 conducting; Present logic low at the C of the triode 3G1 utmost point, deliver to 2 pin of the speech chip 10535 of sound-compound-circuit, speech chip 10535 is quit work do not report to the police.

4, telephone set according to claim 1 and 2, it is characterized in that: when the telephone line fault takes place, can not get 5V voltage at voltage stabilizing didoe 2CW voltage stabilizing two ends, the triode 3G1 of logic control circuit ends, 2 pin of the speech chip 10535 of sound-compound-circuit obtain power supply E and send high level here through resistance R 4, make sound-compound-circuit work; 4 pin of speech chip 10535 are sent high level to the triode 3G2 that promotes amplifying circuit, make triode 3G2 conducting, form the loop with loud speaker Y and power supply E, promote loud speaker Y sounding alarm.

5, telephone set according to claim 1 and 2 is characterized in that: power supply E is the built-in power of telephone set.

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