CN2150685Y - Computer cipher controller for long-distance telephone - Google Patents

Abstract

The utility model relates to a user device to limit the user with no right to use the long distance direct dial service. The utility model has the advantages of strong applicability, convenient operation, hardware structure simplification, software design intensification to extend functions, the utility model is connected in series between the telephone line and the telephone, and the computer cipher controller for the long-distance telephone comprises a bidirectional optical coupler, a pulse-detecting circuit, a dual tone multiple frequency detecting circuit, an SCM circuit, a sound coupling circuit, an on-hook protection and system reset circuit and an electronic switching circuit. The utility model does not influence the local calling and the long distance rightful service using the right cipher, for ex right users and blocked numbers the on-hook lock processing is done. And using the cipher number the cipher can be changed arbitrarily using the telephone.

Description

Computer cipher controller for long-distance telephone

The utility model relates to a kind of subscriber equipment of telephone communication, relates to a kind of device that prevents to send the non-long-distance number of having the right or rather.

Domestic many phones can both be connected domestic and international toll telephone by dial-in direct now, are very easy to the user, but simultaneously again owing to can not effectively prevent the private message toll service, cause unnecessary expenditure.

In order to solve with the combat smuggling problem of people's phone of public money, can not influence normal telephone service again simultaneously, designed many kinds of toll telephone limiters or key passwords telephone set at present.Such device has developed into from initial fixed structure design of shell scheme with lock and has adopted the microcomputer parts to make identification control.These designs differ from one another and also respectively are weak, for example hardware configuration too complicated, independent keyboard need be set be used to insert password and powerup issue etc., they are usually by the speech path control parts of band password setting circuit be serially connected in the switch (or relay contact) that is subjected to the speech path control component controls in the telephone channel and form, control assembly code number of transfering to of checking user at first behind identification " O " number, automatic control switch (contact) cuts off or connects phone circuit again, reaches the purpose of restriction abuse message toll service.

The purpose of this utility model also is a kind of toll telephone computer cipher controller of design, adopt single-chip microcomputer, simplify hardware configuration, strengthen software design with expanded function, have the change password easily, can set arbitrarily on request block number, install easy to connect, more meet custom operation and adaptability, practical characteristics, can be used with double tone multiple frequency telephone set, be suitable for the pulse dialing telephone machine again.

Toll telephone computer cipher controller of the present utility model, be serially connected between telephone wire and telephone set, form with the speech path control parts of control electronic switch operating state by the electronic switch that is serially connected in the speech channel, described electronic switch comprises diode full wave bridge type circuit and electronic switch parts, it is characterized in that described speech path control parts comprise: detect dialing signal, the bidirectional optical coupler of output dial impulse, the pulse-detecting circuit of received pulse formula dialing, receive the double-tone frequency detecting circuit and the single chip circuit that contains single-chip microcomputer of DTMF pulsing, the described bidirectional optical coupler one end input line of answering the call, other end input connects described diode bridge, two-way optocoupler electrical equipment output connects double-tone testing circuit and pulse-detecting circuit frequently, double-tone testing circuit frequently is connected with the two-way I/O end of single-chip microcomputer with pulse-detecting circuit output, the single-chip processor i/o end send the on-hook control signal to the electronic switch parts, described diode bridge is exported an end ground connection, export another termination electronic switch parts, the described diode bridge other end machine of answering the call, another telephone wire via controller common port machine of answering the call.

Bidirectional optical coupler identification dialing signal, output and the corresponding dial impulse of dial, send double-tone testing circuit and pulse-detecting circuit frequently, if the double-tone dialing of phone frequently, then double-tone frequency testing circuit is exported the interruption controls signal, single-chip microcomputer is carried out interrupt operation, reads in and discern the telephone number code signal of double-tone testing circuit output frequently; If pulsed phone dialing, then single-chip microcomputer reads in the also telephone number signal of identification pulse testing circuit output, the electronic switch parts keep normal open state, make the diode bridge that is serially connected in the speech channel constitute path through the electronic switch parts, single-chip microcomputer reads in telephone number and enters the detecting operation program, at first judge the password flag bit, there is flag bit then to keep the on-state of electronic switch parts, the no marks position then further judges whether the blockade number of the Any Digit set into the user, be to block number then to send on-hook signal control electronic switch parts and carry out the on-hook operation, send busy tone, not that blockade software further judges whether to be cipher key number again, it is the operation that cipher key number is then carried out the storage password, and send on-hook signal and control the electronic switch parts, not being cipher key number, then judging whether to be code number, is that code number is then sent an on-hook of on-hook signal control electronic switch parts execution operation, the password flag bit is set simultaneously, is not the on-state that code number still keeps the electronic switch parts.

Describe technology of the present utility model in detail below in conjunction with the embodiment accompanying drawing.

Accompanying drawing 1 is the scheme of installation of toll telephone computer cipher controller.

Accompanying drawing 2 is toll telephone computer cipher controller electricity theory diagram.

Accompanying drawing 3 is one of toll telephone computer cipher controller circuitry schematic diagram.

Accompanying drawing 4 is two of toll telephone computer cipher controller circuitry schematic diagram.

Accompanying drawing 5 is toll telephone computer cipher controller main flow block diagram.

Fig. 3, Fig. 4 are in conjunction with the whole circuit diagrams that constitute the utility model embodiment.

Referring to accompanying drawing 1, toll telephone computer cipher controller 100 is serially connected between main line 1,2 and the telephone set 200, and main line 1,2 connects the L1 and the common port COM of controller 100 respectively, and the L2 of controller 100 and common port COM are connected with telephone set 200.

Referring to accompanying drawing 2; this toll telephone computer cipher controller is by single chip circuit 10; double-tone is testing circuit 20 frequently; pulse-detecting circuit 30; bidirectional optical coupler 40; sound equipment coupling circuit 50; electronic switching circuit 60; on-hook protection and Single Chip Microcomputer (SCM) system reset circuit 70 are formed; bidirectional optical coupler 40 detects the speech channel dialing signal; send the I/O of single-chip microcomputer to hold through double-tone frequency testing circuit 20 or pulse-detecting circuit 30 output dialing signals; when phone is dual-tone dialing; the double-tone output of testing circuit 20 frequently starts single-chip microcomputer with interrupt mode work; when the single-chip microcomputer judgement is blockade; drive sound equipment coupling circuit 50 by its I/O end; make that acoustics circuit sends busy tone in the phone; on-hook protection and Single Chip Microcomputer (SCM) system reset circuit 70 are positioned at 10 of electronic switching circuit 60 and single chip circuits; the I/O end of single-chip microcomputer sends the guard signal that prevents system reset when carrying out the on-hook operation in system, and controller is an electrification reset.Electronic switching circuit 60 comprises diode bridge D1-D4 and electronic switch parts 601.

Referring to accompanying drawing 3, diode bridge D1-D4 and triode BG1-BG3 and peripheral cell thereof are formed electronic switching circuit 60 among the figure, and electronic switching circuit is a normal open circuit, P1.5 signal normality is " 1 ", and anti-phase through not gate 4069/2, BG3 ends, BG2, BG1 conducting, L1 or L2 constitute path through diode bridge D1-D4, triode BG1 and ground, connect speech channel, when the P1.5 end has on-hook signal, 4069/2 output one state, the BG3 conducting, BG2, BG1 end, and then interrupt speech channel.On-hook signal disappears, and then electronic switch recovers normal open state again.

Bidirectional optical coupler 40, embodiment model are HA11A1, detect the dialing signal in the speech channel, its C end output telephone number pulse signal.

Amplifier A1, integrated double-tone be detector MC8870 and peripheral cell composition double-tone frequency testing circuit 20 thereof frequently, when being the dialing of bidirectional multi-frequency phone, STD end output " 0 " signal of MC8870, through the 4069/6 anti-phase INT1 end that send Fig. 3 single-chip microcomputer, single-chip microcomputer produces interrupt operation.The Q1-Q4 end of MC8870 is exported the code signal of telephone number, send the I/O mouth P1.0-P1.3 of Fig. 3 single-chip microcomputer.

BG4,4069/1 and peripheral cell constitute pulse-detecting circuit, bidirectional optical coupler 40 output dial impulses send the I/O mouth P1.4 of single-chip microcomputer among Fig. 3 to hold through BG4, inverter 4069/1, when the no interrupt signal of single-chip microcomputer INT1 end, single-chip microcomputer detects the P1.4 end signal.

BG5 and peripheral cell thereof are formed the sound equipment coupling circuit, when the telephone number that single-chip microcomputer detects is judged as blockade, its P1.6 end is sent interrupting pulse, be coupled to telephone set and produce busy tone, when this external user changed password, single-chip microcomputer was also sent the Acknowledgement Tone signal through the P1.6 end after examining cipher key number and receiving the code number of changing.

Capacitor C, inverter 4069/5,4069/3 and peripheral cell thereof constitute electrify restoration circuit; the output map interlinking 3 single-chip microcomputers RESET end that resets, BG6,4069/4 constitutes on-hook protective circuit, the input of Fig. 3 single-chip microcomputer P1.7 termination 4069/4; when unsettled; A point current potential is " 1 ", and when single-chip microcomputer P1.5 end was sent on-hook signal, its P1.7 end provided on-hook guard signal " 0 " simultaneously; the BG6 conducting; A point current potential is " 0 ", and RESET is " 0 ", and protectiveness prevents system reset.

Referring to accompanying drawing 4, single-chip microcomputer 80C31, bus driver 74HC373 and ROM27C64, the P0.0-P0.7 of single-chip microcomputer 80C31 connects data/address bus, the data terminal D0-D7 of bus driver 74HC373 data terminal D0-D7 and ROM is connected across on the data/address bus, data/address bus is by one group of drop-down current potential of resistance R 1-R8, with stable level, preceding 8 A0-A7 in ROM address meet bus driver output Q1-Q7,5 A8-A12 meet single-chip microcomputer P2.0-P2.4 behind the ROM address, the chip select signal of single-chip microcomputer P2.7 output bus driver and ROM.

Referring to accompanying drawing 5, code number of the present utility model is designed to 4, and 4 password first places can not be with 0, so the user can select the code number password of the own phone of a kind of conduct in 9000 kinds of passwords.Can adopt key freely to change at any time, during change, button is squeezed into cipher key number on the use telephone set, the key figure place can be chosen wantonly, and the utility model is chosen as 7 keys, imports 4 code numbers again after the key input is finished, controller is sent Acknowledgement Tone, and the password of storage change.

When using the long-distance call direct dialing service, 4 passwords of at first transfering, the output of the correct dialing tone for the second time of password is dialled trunk code and called phone number, again as access failure, as long as click the phone hook switch, just can reach by the redial key on the phone when hearing dialing tone and redial purpose, therefore not dial code number earlier, or code number not to the time, device will be sent busy tone, reaches to block to have no right user's purpose.

When the Private Branch Exchange PBX user uses this controller station-to-station call, also should dial four code numbers earlier, hear that dialling first O again behind the secondary dial tone connects local telephone network, continue to dial trunk code and called phone number then, this moment, controller software was not examined first O, and examined second O.

This controller also can have the function of limiting call time by software design, air time also can be set in the Password Operations mode by the phone button, any one time point in 1-9 minute for example number is to select number to be stored in the controller in advance arbitrarily by customer requirements and block.

The utility model controller adopts single chip microcomputer and high integration low-power consumption chip, control is had no right the user and is used the long-distance call direct dialing service, for direct distance dialing call unit and trunk line user management provide a kind of effective control device, have that the change password is easy, applicability strong, the practical level advantages of higher.

Claims (5)

1, a kind of toll telephone computer cipher controller, be serially connected between telephone wire and telephone set, form with the speech path control parts of control electronic switch operating state by the electronic switch that is serially connected in the speech channel, described electronic switch comprises diode full wave bridge type circuit and electronic switch parts, it is characterized in that described speech path control parts comprise: detect dialing signal, the bidirectional optical coupler of output dial impulse, the pulse-detecting circuit of received pulse formula dialing, receive the double-tone frequency detecting circuit and the single chip circuit that contains single-chip microcomputer of DTMF pulsing, the described bidirectional optical coupler one end input line of answering the call, other end input connects described diode bridge, the output of bi-directional light coupling electrical equipment connects double-tone testing circuit and pulse-detecting circuit frequently, double-tone testing circuit frequently is connected with the two-way I/O end of single-chip microcomputer with pulse-detecting circuit output, the single-chip processor i/o end send the on-hook control signal to the electronic switch parts, described diode bridge is exported an end ground connection, export another termination electronic switch parts, the described diode bridge other end machine of answering the call, another telephone wire via controller common port machine of answering the call.

2, toll telephone computer cipher controller according to claim 1 is characterized in that also comprising the sound equipment coupling circuit, and input connects the two-way I/O end of single-chip microcomputer, and output connects described controller common port.

3, toll telephone computer cipher controller according to claim 1; it is characterized in that being connected to on-hook protection and Single Chip Microcomputer (SCM) system reset circuit between electronic switch parts and single-chip microcomputer reset terminal RESET, the two-way I/O end of single-chip microcomputer send the on-hook guard signal that prevents that Single Chip Microcomputer (SCM) system from resetting to on-hook protection and Single Chip Microcomputer (SCM) system reset circuit in the output on-hook signal.

4, toll telephone computer cipher controller according to claim 1 is characterized in that described single chip circuit comprises single-chip microcomputer, bus driver and read-only memory ROM.

5, toll telephone computer cipher controller according to claim 1, it is characterized in that described double-tone frequently testing circuit by amplifier and integrated double-tone frequently detector forms integrated double-tone frequency detector STD termination singlechip interruption end INT1.

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