CN1153436A

CN1153436A - Telephone caller

Info

Publication number: CN1153436A
Application number: CN 95114021
Authority: CN
Inventors: 任延吉
Original assignee: Individual
Current assignee: Individual
Priority date: 1995-12-22
Filing date: 1995-12-22
Publication date: 1997-07-02

Abstract

A telephone calling device as auxiliary of telephone set including extension set features that audio signal is used as identification mark to realize next calling when telephone set is used to talk. With said device, extension set can be used to realize the function of direct-dial telephone set. When ringing circuit failures, said device is used to call.

Description

Telephone caller

The invention belongs to communication field, relate to a kind of recall device that is applied to direct connection telephone and non-direct connection telephone.

In using direct connection telephone and non-direct connection telephone communication process, following point often appears:

1. in the direct connection telephone communication system, side's direct connection telephone on-hook is bad, and then the other side's on-hook is with regard to ring, and at this moment voiceless sound again after picking up needs to connect another road Advise By Wire the other side, if having only one road direct connection telephone, then both sides' communication is interrupted, and is difficult to recover;

2. for the non-direct connection telephone of putting through comparison difficulty or can only folk prescription dialling in, for guaranteeing timely contact, in fill order or look for man-hour, general both sides are all permanent, and listening to echo side needs to take microphone keep to listen for a long time;

3. in Production Scheduling System, in the time of need listening to the report of command execution situation immediately, generally hold the line, if at this moment find query, when needing to understand, examining situation or correcting order, can't get in touch with this phone, can only be with another road telephone contact, but general execution person no longer connects other phone or had little time when answering the call to correct, and this has just lost the chance of correcting a mistake;

4. when there was fault in direct connection telephone ring loop, then this road direct connection telephone can't ring, even passage well can not use.

Still can carry out the device that high loudness is called out when the objective of the invention is to finish a kind of telephone relation,, realize the recall in the communication process, make communication system more perfect, reliable to overcome above deficiency.

The method that realizes recall is to connect a telephone caller on the telephone line of both call sides or in the telephone set respectively, when needing call peer, press the telephone caller call button, then telephone caller sends a kind of special audio signal, be sent to the other side's telephone caller by telephone line, the other side's telephone caller sends chimes of doom after identifying this audio signal, thereby realizes recall.

Through consulting domestic and international interrelated data, find no similar design and product.

The telephone caller block diagram as shown in Figure 1, mainly form by audio frequency generation (5) circuit, audio identification (2) circuit, warning (3) circuit, locking (7) circuit, power supply (4) circuit, (5) circuit takes place in audio frequency and audio identification (2) circuit links together the circuit of answering the call again (1); (5) circuit takes place and is controlled by call button (6) in audio frequency; Audio identification (2) circuit control warning (3) circuit; When reporting to the police (3) circuit working, by locking (7) circuit interlocking button (6); After call button (6) is pressed, make audio frequency that (5) circuit working take place and send call signal, and by locking (7) circuit interlocking warning (3) circuit; Power supply (4) circuit is that audio frequency (5) circuit, audio identification (2) circuit, warning (3) circuit takes place DC power supply is provided.

Telephone caller uses audio signal as distinguishing mark, and is highly sensitive, antijamming capability is strong, is suitable for carrier wave, microwave, open-wire line, optical cable, various communication channels such as wireless, and its channel quality is had no requirement, as long as can converse, just can call out.

Telephone caller adopts the preferential working method of calling party, and the callee sends chimes of doom after receiving call signal, and the locking call function, and avoided occurring competition and called out, and situation about can't report to the police.

The present invention can solve the bad communication obstacle that causes of direct connection telephone on-hook; Avoid execution command or look for man-hour to keep ling watch; On non-direct connection telephone, carry out recall, realize the direct connection telephone function; When there is fault in direct connection telephone ring loop, use this device to call out.

Fig. 2 is a specific embodiments, and wherein " → ", " ← " represent the sense of current, and directly line represents that electric current can two-way flow.Execution mode below in conjunction with Fig. 2 specifically describes the present invention.

Charge power supply control (1) circuit input end is connected with AC power (10) among Fig. 2, the other end connects rechargable battery (2), during operate as normal, AC power (10) is controlled (1) circuit to rechargable battery (2) floating charge by charge power supply, if rechargable battery (2) brownout, then carry out quick charge, after AC power (10) disappears, by charge power supply control (1) circuit indication rechargable battery (2) voltage condition.Charge power supply control (1) circuit is made up of current rectifying and wave filtering circuit and 555 time-base circuits, carry out voltage ratio, charging control and indicating, charging process is all carried out automatically.

Rechargable battery (2) provides power supply through voltage stabilizing (3) circuit to reception (4) circuit, decoding (5) circuit, warning (6) circuit, amplification (7) circuit, audio frequency (8) circuit; Voltage stabilizing circuit (3) is made up of the integrated regulator TC55 of low pressure reduction, little power consumption.

Calling out the loop is made up of button (9), audio frequency (8) circuit, amplification (7) circuit, high-pass filtering (12) circuit.When needing call peer, push button (9), audio frequency (8) circuit working, its audio signal transmits to the other side through high-pass filtering (12) circuit, telephone line (11) after delivering to the amplification of amplification (7) circuit.Voicefrequency circuit (8) is made up of dual-tone dialing integrated circuit MK5089, sends signal and organizes frequently for " C "; Amplifying (7) circuit is grade output amplifier of penetrating of triode 9014 compositions; High-pass filtering (12) circuit is passive T-shape high pass filter, and its cut-off frequency is 400 hertz.Adopt high pass filter, the phone ringing-current is not exerted an influence to it, it is very little to the telephone relation quality influence; Do not have resistance to get in touch with telephone line, not power taking words DC feedback even this device damages short circuit, does not influence the normal use of phone yet.

Alarm circuit is made up of high-pass filtering (12) circuit, reception (4) circuit, decoding (5) circuit, warning (6) circuit.During to party call, its audio signal of sending receives (4) circuit to this machine and transmits through telephone line (11), high-pass filtering (12) circuit, behind decoding (5) circuit, drives (6) circuit of reporting to the police and gives the alarm.Receiving (4) circuit is made up of double-tone frequency recognition integrated circuit G8870; Decoding (5) circuit is made up of with a door CD4068 8 inputs, when receiving double-tone frequently " C " frequency organized signal, and output low level; (6) circuit of reporting to the police is made up of the dry-reed relay, the warning musical film that drive triode 9015, band changeover contact, when decoding (5) circuit output low level, and the dry-reed relay adhesive, the warning musical film sends chimes of doom.

Locking (14) circuit one termination warning (6) circuit, another termination button (9) utilizes in (6) circuit of reporting to the police and realizes blocking function in the changeover contact of spring relay and the attached contact that helps in the button (9).This machine by locking (14) circuit interlocking button (9), makes it to send call signal after receiving the warning of the other side's call signal; When pushing button (9), this device sends call signal, and warning (6) circuit of this machine of locking does not simultaneously give the alarm it.

Claims

1, telephone caller is characterised in that on the telephone line of both call sides or connects this device in the telephone set respectively, when needing call peer, press the call button of this device, then this device sends a kind of special audio signal, be sent to by telephone line in the other side's the same sampling device, after this device of the other side identifies this audio signal, send chimes of doom, thereby realize recall.

2, telephone caller is characterised in that mainly and is made up of audio generating circuit, audio identification circuit, warning circuit, exclusive circuit, power circuit, and audio generating circuit and audio identification circuit link together, the circuit of answering the call again; Audio generating circuit is controlled by call button; Audio identification circuit control warning circuit; During warning circuit work, by exclusive circuit locking call button; After call button is pressed, make audio generating circuit work send call signal, and by exclusive circuit locking warning circuit; Power circuit provides DC power supply for audio generating circuit, audio identification circuit, warning circuit.