CN2309017Y

CN2309017Y - Telephone cipher device

Info

Publication number: CN2309017Y
Application number: CN 97236758
Authority: CN
Inventors: 彭志平
Original assignee: Individual
Current assignee: Individual
Priority date: 1997-08-07
Filing date: 1997-08-07
Publication date: 1999-02-24
Anticipated expiration: 2007-08-07

Abstract

The utility model relates to a telephone cipher device, which is characterized in that the telephone cipher device is composed of a telephone bell lock circuit (1), a ringing detection circuit (2), an off-hook/on-hook simulating circuit (3), a decoding control circuit (6), an information return circuit (4), a buzzer (5), a voltage regulator circuit (7), a power supply switch K1 and a cipher arranging switch block K2. The circuit design of the utility model is optimal, reasonable and simple, and does not depend on exchangers of telecommunication offices to provide information; the telephone cipher device does not use batteries and has no electric consumption in normal times. The utility model has the advantages of convenient operation and reliable performance. The telephone cipher device can be opened and closed at any time through K1, and can effectively eliminate interference telephones under the precondition of ensuring that telephones are expedite.

Description

A kind of telephone cipher device

The utility model relates to the additional encryption apparatus of a kind of telephone terminal, is used to get rid of the undesirable interfering phone of user.

At present, along with popularizing of phone, making nuisance calls consciously or unconsciously becomes an evil.A kind of being called " phone manager's " product is arranged, the other side's telephone number can be shown, connect this phone by user's decision.But this function need be cooperated and could be realized by switch in the telecommunication bureau.And, no matter you connect this phone,, still can cause some interference to people's normal rest always telephone ringer will ring.

The purpose of this utility model is, overcomes the shortcoming of prior art, and providing a kind of can work alone, at the telephone cipher device that guarantees can effectively get rid of under the unimpeded prerequisite of phone interfering phone.

The purpose of this utility model realizes by following technical solution: a kind of telephone cipher device, it is characterized in that by telephone ringer lock circuit (1), ring detecting circuit (2), simulation is plucked/on-hook circuit (3), decoding control circuit (6), information loopback circuit (4), buzzer (5), voltage stabilizing circuit (7), mains switch K1, password setting switches set K2 forms, circuit (1) one end connects telephone set, one end connects telephone wire L2, K1 one end connects telephone wire L1, the input of one end parallel circuits (2) and circuit (3), the trigger end of circuit (2) output difference connecting circuit (1) and circuit (3), the output C point of circuit (3) is connecting circuit (6) respectively, (7) input, circuit (4), (5) output, three outputs of circuit (6) are connecting circuit (3) respectively, (4), (5) input, the power end of the output connecting circuit (6) of circuit (7), the input of K2 one end connecting circuit (6), an end connects telephone wire L2.

With reference to the accompanying drawings and in conjunction with the embodiments the utility model is described in detail.

Fig. 1 is the utility model electricity theory diagram.

Fig. 2 is the utility model electricity principle schematic.

As shown in Figure 1, the telephone cipher device is by telephone ringer lock circuit (1), ring detecting circuit (2), simulation is plucked/on-hook circuit (3), decoding control circuit (6), information loopback circuit (4), buzzer (5), voltage stabilizing circuit (7), mains switch K1, password setting switches set K2 forms, circuit (1) one end connects telephone set, one end connects telephone wire L2, K1 one end connects telephone wire L1, the input of one end parallel circuits (2) and circuit (3), the trigger end of circuit (2) output difference connecting circuit (1) and circuit (3), the output C point of circuit (3) is connecting circuit (6) respectively, (7) input, circuit (4), (5) output, three outputs of circuit (6) are connecting circuit (3) respectively, (4), (5) input, the power end of the output connecting circuit (6) of circuit (7), the input of K2 one end connecting circuit (6), an end connects telephone wire L2.

As shown in Figure 2, among the embodiment, circuit (1) is made up of one-way SCR VT1, optocoupler GO and resistance R 1, capacitor C 1, R1 is connected between the anode and trigger electrode of VT1, reception diode one end of optocoupler connects the trigger electrode of VT1, and an end connects the negative electrode of VT1, and C1 is connected between the trigger electrode and negative electrode of VT1, the anode of VT1 connects telephone set, and negative electrode connects telephone wire L2; Circuit (2) is made up of voltage stabilizing didoe DW1, optocoupler GO, resistance R 2, the DW1 negative pole connects the input of K1 one end and circuit (3), positive pole sends diode cathode with GO and is connected, and GO sends diode cathode and connects R2 one end, the trigger end B point of R2 other end connecting circuit (3); Circuit (3) is made up of triode VT2, VT3 and resistance R 9, and the emitter of VT3 connects the DW1 negative pole, and collector electrode connects the C point, and base stage links to each other with the collector electrode of VT2 through R9, and the base stage of VT2 connects the B point, and emitter connects L2; Circuit (4) is made up of triode VT4 and resistance R 4, R7, and the collector electrode of VT4 connects the C point through R4, and emitter connects L2, and base stage is through an output of R7 connecting circuit (6); Circuit (7) is made up of resistance R 5, R6 and voltage stabilizing didoe DW2, and R5, R6 are serially connected with between C point and the DW2 negative pole, the anodal L2 that connects of DW2; Circuit (5) is made up of buzzer Y, triode VT5 and resistance R 8, and Y one end connects the tie point of R5, R6, and the other end connects the collector electrode of VT5, and the emitter of VT5 connects L2, and base stage is connected with an output of circuit (6) through R8; Circuit (6) is made up of decoder IC1, single-chip microcomputer IC2, and IC1 input 2 pin connect the C point through its peripheral circuit R10, C2, and the 10-14 pin of IC1 is connected with the 9-13 pin of IC2, and output 17 pin of IC2 connect the B point through R3; K2 is made up of three switches, and their end connects input 6,7,8 pin of IC2 respectively, and the other end connects L2.

The utility model embodiment circuit devcie selects for use model as follows: VT1 can select BT169 for use, MCR100-6, MCR100-8 etc. are withstand voltage greater than the one-way SCR of 200V, optocoupler GO can select 4N25 for use, TL113, models such as P251, VT2 is S5551, VT3 is S5401, VT4, VT5 is A42 or S5551, IC1 is MT8870 one a class double audio decoder, IC2 is AT2051, AT1051, PIC16C54 one class single-chip microcomputer, also can use MTU series (MTU401.425 etc.), the single-chip microcomputer of CW series (CW86104 an etc.) class band phonetic function, K1 can be a locking press button switch, it also can be the electronic switch of band timer, as TEC8445 etc., K2 can be 3-8 position toggle switch or inserted sheet row.

The utility model use is as follows: closed K1, install in running order.Give the device preset password by K2.When there is bell signal in telecommunication bureau, bell signal through telephone wire L1, K switch 1, the DW1 of ring detecting circuit (2), the transmission diode of optocoupler GO, R2, simulation pluck/the VT2 base stage of on-hook circuit (3), telephone wire L2 return.Because the emitter of optocoupler GO has triggering signal, the phototriode of its receiving terminal is low resistance state, with the VT1 locking of telephone ringer lock circuit (1), although this moment, bell signal also reached the VT1 anode through telephone set, but because VT1 locking, so bell signal can't pass through, and station ringer can not ring.Simultaneously, bell signal enters simulation through R2 and plucks/VT2, the VT3 of on-hook circuit (3), produce the simulation off hook signal, telecommunication bureau stops ringing-signal feeding on the one hand, R5, R6 through voltage stabilizing circuit (7) produces stable operating voltage on DW2 on the other hand, to decoding control circuit (6) power supply, it is started working.The IC2 of circuit (6) exports the base stage of a high potential to VT2 through R3 earlier, allow VT3 continue to maintain conducting state, and input the prompt tone of password for the other side that asks of (4) lasting 1-2 of information loopback circuit second through R7, perhaps directly send the voice of " you are good, please input password " through R7, information loopback circuit (4) by IC2.The VT4 of circuit (4) modulates circuit through R4, the prompt tone loopback is given the other side's telephone set.The other side hears that the password dialled behind the prompt tone deciphers through L1, K1, VT3, C2 input IC2, the data-signal that decoding produces is imported IC2 again, by IC2 the password that decoding data signal and K2 set is compared, if consistent, then send the tweeting sound that replaces telephone ringer, and produce a modulation signal through R5 through R8 control buzzer Y, the other side is given in loopback, can hear simultaneously in the other side's earphone and the common different ring-back tone of telecommunication bureau's telephone bell that the expression password is correct, phone is put through; If inconsistent or in official hour, do not receive password, the last no signal of R8, buzzer is sounding not, this moment by IC2 through R7, VT4 to one of the other side's loopback and the identical ring-back tone of telecommunication bureau's telephone bell, the expression phone is put through, but may owner stay out, and nobody answers the call.After the ring-back tone certain time (as 20-40 second), IC2 exports a low level through R3 and gives VT2, closes VT3, realizes the simulation on-hook, loses voltage on the DW2, and IC1, IC2 quit work, and wait for the arrival of bell signal next time.If K1 is disconnected, the utility model device then quits work, and telephone set recovers normal condition, does not make with the phone of password, and telephone bell all can ring.

The utility model optimized, reasonable, simple, do not rely on telecommunication bureau's switch information is provided, without battery, not power consumption at ordinary times, easy to use, dependable performance can or be opened the telephone cipher device at any time by the K1 timing, guaranteeing to get rid of interfering phone effectively under the unimpeded prerequisite of phone.

The utility model volume is little, and circuit devcie can place in the special-purpose housing, also can place in the telephone shell or in the miscellaneous equipment casing.

Claims

1, a kind of telephone cipher device, it is characterized in that by telephone ringer lock circuit (1), ring detecting circuit (2), simulation is plucked/on-hook circuit (3), decoding control circuit (6), information loopback circuit (4), buzzer (5), voltage stabilizing circuit (7), mains switch K1, password setting switches set K2 forms, circuit (1) one end connects telephone set, one end connects telephone wire L2, K1 one end connects telephone wire L1, the input of one end parallel circuits (2) and circuit (3), the trigger end of circuit (2) output difference connecting circuit (1) and circuit (3), the output C point of circuit (3) is connecting circuit (6) respectively, (7) input, circuit (4), (5) output, three outputs of circuit (6) are connecting circuit (3) respectively, (4), (5) input, the power end of the output connecting circuit (6) of circuit (7), the input of K2 one end connecting circuit (6), an end connects telephone wire L2.

2, telephone cipher device according to claim 1, it is characterized in that: circuit (1) is made up of one-way SCR VT1, optocoupler GO and resistance R 1, capacitor C 1, R1 is connected between the anode and trigger electrode of VT1, reception diode one end of optocoupler connects the trigger electrode of VT1, one end connects the negative electrode of VT1, C1 is connected between the trigger electrode and negative electrode of VT1, and the anode of VT1 connects telephone set, and negative electrode connects telephone wire L2; Circuit (2) is made up of voltage stabilizing didoe DW1, optocoupler GO, resistance R 2, the DW1 negative pole connects the input of K1 one end and circuit (3), its positive pole sends diode cathode with GO and is connected, and GO sends diode cathode and connects R2 one end, the trigger end B point of R2 other end connecting circuit (3); Circuit (3) is made up of triode VT2, VT3 and resistance R 9, and the emitter of VT3 connects the DW1 negative pole, and collector electrode connects the C point, and base stage links to each other with the collector electrode of VT2 through R9, and the base stage of VT2 connects the B point, and emitter connects L2; Circuit (4) is made up of triode VT4 and resistance R 4, R7, and the collector electrode of VT4 connects the C point through R4, and emitter connects L2, and base stage is through an output of R7 connecting circuit (6); Circuit (7) is made up of resistance R 5, R6 and voltage stabilizing didoe DW2, and R5, R6 are serially connected with between C point and the DW2 negative pole, the anodal L2 that connects of DW2; Circuit (5) is made up of buzzer Y, triode VT5 and resistance R 8, and Y one end connects the tie point of R5, R6, and the other end connects the collector electrode of VT5, and the emitter of VT5 connects L2, and base stage is connected with an output of circuit (6) through R8; Circuit (6) is made up of decoder IC1, single-chip microcomputer IC2, and IC1 input 2 pin connect the C point through its peripheral circuit R10, C2, and the 10-14 pin of IC1 is connected with the 9-13 pin of IC2, and output 17 pin of IC2 connect the B point through R3; K2 is made up of three switches, and their end connects input 6,7,8 pin of IC2 respectively, and the other end connects L2.

3, telephone cipher device according to claim 1 and 2 is characterized in that circuit devcie places in the special-purpose housing.

4, telephone cipher device according to claim 1 and 2 is characterized in that circuit devcie places in the telephone shell.

5, telephone cipher device according to claim 2 is characterized in that the single-chip microcomputer of the IC2 of circuit (6) for the band phonetic function.