CN2233140Y

CN2233140Y - Digital puzzle lock of telephone

Info

Publication number: CN2233140Y
Application number: CN 95201892
Authority: CN
Inventors: 陈国亮
Original assignee: Individual
Current assignee: Individual
Priority date: 1995-01-27
Filing date: 1995-01-27
Publication date: 1996-08-14
Anticipated expiration: 2005-01-27

Abstract

The utility model discloses a digital puzzle lock of telephones, which is connected to telephone communication network. The utility model is mainly characterized in that a monolithic computer IC3 is connected between a three-digit own coding switching circuit and an integrated package IC1 to realize limiting dialing and unlocking code control and pulse dialing judgment. The utility model can limit dialing international and national long-distance telephone numbers, worldwide information channels, music channels, long-distance call registration channels, etc. The utility model can realize that users can code arbitrarily on their own by the three-digit own coding switch, and affect other local telephone and special numbers in dialing out. The digital puzzle lock of telephone has the advantages of convenient operation, and extra strong function, and the utility model convenient operation, can be used for families, office places, public telephone stalls, etc.

Description

The phone numbers coded lock

The utility model relates to the jockey of telephone communication network, particularly a kind of digital cipher lock that is connected with telephone set.

At present, be used for limit and dial international, National calls and various places information station, Music Radio, trunk record position etc., all not with the isolated plant of the compatible use of telephone set, could realize such function and must handle relevant business telephone machine to telecommunication bureau.The deficiency that it exists is: in case its password determines then can not arbitrarily change that this confidentiality to phone comes lecture to bring certain influence.

The purpose of this utility model provides a kind of both can the limit and dials, do not influence simultaneously the dial-out of other local telephone network and special number (119,110,120 etc.) phone again, the user can carry out self-editing unlocking cipher according to 3 own coding switches, uses digital cipher lock very easily.

Technical solution of the present utility model is:

(1) electronic switching circuit of forming by resistance R 1 to R3, triode BG1 to BG3 and voltage-stabiliser tube DW in the output terminals A point serial connection of electrodeless change-over circuit, the output B point current potential of this circuit is divided into three tunnel outputs, deliver to the unlocking cipher decoding circuit of forming by ic chip 1, IC2, single-chip microcomputer IC3 and peripheral cell thereof respectively, wherein one the tunnel be connected to 18 pin of IC1 and 24 pin of IC2 through diode D5, two-way is connected to 5 pin and 8 pin of single-chip microcomputer IC3 respectively through diode D6 and D7 in addition;

(2) described single-chip microcomputer IC3 is serially connected between 3 own coding switching circuits and the ic chip 1,15 pin of IC3 and 17 pin of IC2 join, 16 to 18 pin respectively with 3 bit switch K1, K2, the end of K3 joins, (4 to 10 pin of 8 pin of the other end of switch and IC2 join), IC3 12 through resistance R 6, R7 also with electronic switching circuit in the base stage of triode BG1 join, 10 pin of IC3 and 11 pin are respectively through capacitor C 11 and resistance R 5, luminous tube LED earthing potential, 1 to 4 pin of IC3 respectively with 2 of 11 to 14 pin of IC1 and IC2,3,21,22 pin join, the 6 foot meridian capacitor C4 of IC3,7 pin of C5 and IC1 join, simultaneously at 6 of IC3, also be connected to crystal XT between 7 pin.

The utility model compared with prior art can be achieved as follows advantage:

(1) but the limiting dialing world, national distance and various places information station, Music Radio, trunk record position (0,103,105,108,111,113,115,118,123,160,168,173,175,179,960,968 etc.) do not influence local telephone network transfers to, more do not influence 119,113,120 dial-out.

(2) be provided with 4 password unlockings (first place is preset by producer, self-editing three of user), unblank the back on-hook above shutting automatically for three seconds.

(3) be provided with the indication of unblanking, after the user pressed password, indicator light was bright, and the expression phone is not subjected to the dialing restriction, and the telephone set that can be suitable for any model uses.

Below in conjunction with accompanying drawing the utility model is described in detail:

Fig. 1 is circuit theory diagrams of the present utility model;

Fig. 2 is a connection diagram of the present utility model;

Fig. 3 is a shape assumption diagram of the present utility model.

As shown in Figure 1: be connected to piezo-resistance Ru by outside line EXT two ends, one end is formed stepless change-over circuit by diode D1-D4, its output terminals A point series resistor R1 to R3, triode BG1 to BG3 are to the B point, and the B point is got back to the C point by voltage-stabiliser tube DW and constituted conversation ring loop.The base stage of BG3 is connected by resistance R 3 with the collector electrode of BG2 simultaneously, the collector electrode of BG1 is connected an end of resistance R 2 with the base stage of BG2, the other end of R2 is by emitter, resistance R 1, the electrodeless change-over circuit output terminals A point of connection of BG3, and the positive pole of the emitter of BG1, BG2 and voltage-stabiliser tube DW joins.B point output three road signals, the one tunnel delivers to power supply 24 pin 1 pin of ic chip 1 power supply, 18 pin and IC2 through diode D5, and other two-way of B point is judged 8 pin through power supply 5 pin and pulse that diode D6 and D7 deliver to monolithic utmost point IC3 respectively.The other end of EXT links to each other with TEL, simultaneously through capacitor C 6,2 pin and 3 pin, 4 pin (reference voltage output terminal) that resistance R 8 is connected to ic chip 1 join with 1 pin, 5,6,9 pin earthing potentials, 7 pin clocks are provided by capacitor C 5 by the output of 6 pin of single-chip microcomputer IC3, and 10 pin (EN) are connected to 10 pin (EN) of single-chip microcomputer IC3 by current-limiting resistance R11 with 15 pin.The output of 11 to 14 pin (BCD binary code) of IC1 respectively with 1 to 4 pin of single-chip microcomputer IC3,2,3,21,22 pin of IC2 join, meet clock oscillation crystal XT between 6,7 pin of IC3, the 10 foot meridian capacitor C11 ground connection of IC3,11 pin (indication of unblanking) are through resistance R 5, LED earthing potential.12 pin of IC3 join through the base stage of divider resistance R6, R7 and triode BG1,15 to 18 pin of IC3 are the unlocking cipher input, 17 pin, K switch 1, K2, K3 one end (8) with IC2 joins respectively, joins with 4 to 10 pin of IC2 respectively after 1 to 8 of the other end of K1, K2, K3 joins again.

Operation principle of the present utility model is: when telephone ringer flows to fashionable, electric current is exported by the A point through the electrodeless change-over circuit that D1 to D4 forms, again through resistance R 1 to R3, the electronic switching circuit that triode BG1 to BG3, voltage-stabiliser tube DW form is exported to the B-C point, ringing telephone stations.When the phone off-hook, single-chip microcomputer IC3 must reply the position by cable, and by 12 pin output low levels, switching tube BG1 ends, and phone gets electric work.Dial and the unlocking cipher circuit working for the limit that IC1, IC2, IC3 etc. form by the 5 volts of pressure drops of output of voltage-stabiliser tube DW two ends simultaneously.Its operating current one tunnel is sent into IC1 through diode D5, and two-way is sent into single-chip microcomputer IC3 respectively through diode D6, D7 in addition, does pulse dialing by 8 pin of IC3 and detects.When the user transfers to the limit dialing frequently with double-tone, form the double-audio signal input circuit by capacitor C 6, resistance R 8, R9, after making 2, the 3 pin detection effectively of IC1, by 15 pin output high level, uprise level through resistance R 11 to 10 pin (EN) again, after then sending BCD (binary system) sign indicating number and send into single-chip microcomputer 1 to 4 pin and discern dail-limiting number by 11 to 14 pin of IC1, by its 12 pin output high level through resistance R 6, R7 shunting rear push base stage to electronic switching circuit BG1, the BG1 conducting, BG2, BG3 end, telephone set no current do not work (forcing on-hook).This moment, power supply was provided by capacitor C 1 after single-chip microcomputer was delayed time 2 seconds, and 12 pin are sent low level, and BG1 ends, and BG2, BG3 begin conducting, and telephone set gets electric reworking.Other limit dialing principle is identical.When the user transferred to the restriction number with pulse, because the break-make of circuit changes, then B point current potential just changed, and promptly single-chip microcomputer 8 pin level also just change.After single-chip microcomputer was judged dail-limiting number, by 12 pin output high level, the following course of work limit group principle identical with double-tone frequently.When the user transferred to unrestricted number with double-tone frequency or pulse, single-chip microcomputer 12 pin are output low level always, and circuit is in conducting state always, transfers to so do not influence other number.

When the user need dial the restriction number, elder generation's input 9, A, B, C (9 by factory settings, and A, B, C are set arbitrarily by the user).When using dual-tone dialing, 11 to 14 pin of IC1 are sent 2,3,21,22 pin of binary-coded decimal to IC2, after deciphering by IC2, the 1-8 position of K switch 1, K2, K3 is delivered in the output of from 4 to 10 and 18 pin, 17 pin of IC2 (factory settings first place 9) are sent into 15 to 18 pin (password judgement) of single-chip microcomputer IC3, and wherein the judgement signal of 16 to 18 pin is sent into by 8 code switchs.As the 15-18 pin of IC3 (password meets) behind the input high level in order, send high level (forcing on-hook) by 12 pin, reply low level after 1 second of delaying time, 11 pin are sent high level, and the indicator light LED that unblanks is bright, and this moment, the telephone set dialing was unrestricted.When the user used pulse dialing, IC1 did not work, and then the binary-coded decimal of the IC2 binary-coded decimal of sending the respective pulses number by single-chip microcomputer 1-4 pin is sent into IC2.Principle is identical frequently with double-tone for following process.When the user in 3 seconds during on-hook, capacitor C 1 continues to supply with the operating voltage of single-chip microcomputer, so off-hook is dialled when limiting number again, does not need unlock operation again, otherwise then will carry out unlock operation again.

As shown in Figure 2: 1 is the outside line input; 2 are the telephone connection end; 3 is the phone numbers coded lock.

As shown in Figure 3: 1 is the outside line input; 2 are the telephone connection end; 3 is the self-editing switch in the digital cipher lock; 4 are the indicator light of unblanking; 5 is open keyhole.

Claims

1, a kind of phone numbers coded lock, by electrodeless change-over circuit, electronic switching circuit, double-tone frequently decoding circuit, pulse dialing decision circuitry, unlocking cipher decoding circuit, 3 own coding switching circuits and single chip machine controlling circuit etc. constitute, it is characterized in that:

(2) described single-chip microcomputer IC3 is serially connected between 3 own coding switching circuits and the ic chip 1,15 pin of IC3 and 17 pin of IC2 join, 16 to 18 pin respectively with 3 bit switch K1, K2, the end of K3 joins, (4 to 10 pin of 8 pin of the other end of switch and IC2 join), 12 pin of IC3 are through resistance R 6, R7 also with electronic switching circuit in the base stage of triode BG1 join, 10 pin of IC3 and 11 pin are respectively through capacitor C 11 and resistance R 5, luminous tube LED earthing potential, 1 to 4 pin of IC3 respectively with 2 of 11 to 14 pin of IC1 and IC2,3,21,22 pin join, the 6 foot meridian capacitor C4 of IC3,7 pin of C5 and IC1 join, simultaneously at 6 of IC3, also be connected to crystal XT between 7 pin.