CN2066639U

CN2066639U - Eliminator for private toll call

Info

Publication number: CN2066639U
Application number: CN 90207749
Authority: CN
Inventors: 宋玮; 马肃领
Original assignee: Individual
Current assignee: Individual
Priority date: 1990-06-02
Filing date: 1990-06-02
Publication date: 1990-11-28

Abstract

The utility model discloses a telephone limiter for a private toll call, belonging to the control technique of programmable computers, and comprising a programmable computer 4 and an automatic switch 5 which is connected between a telephone and an external wire. When calling, an individual code is firstly input on the keyboard of the limiter of the utility model before dialing; the computer checks that if the number dialed exceeds the limitation according to the code input by a person in charge beforehand and the permissible call range of the person in charge to control the action of the automatic switch, realizing the limitation of the toll call which is not in the permissible range to avoid the large amount of waste of call fee. The limiter of the utility model can be installed without the modification of the telephone and exchanger. The utility model which can be used for limiting the over-range making of a facsimile apparatus can print the bill of telephone charge.

Description

Eliminator for private toll call

The utility model relates to a kind of restriction and fornicates long-distance limiter with official telephone.

At present, many telephone sets can both be connected domestic, international long-distance telephone by dial-in direct, and this greatly improves speed of information exchange, has improved work efficiency.But also there is artificial private business to use in the indiscriminate the whole nation of official telephone even international long-distance telephone simultaneously,, is responsible for the director and may knows nothing, when receiving great number telephone expenses notice, just stood aghast with surprise, and have no way of verifying this.Present domestic this class limiter that the private official telephone at will carries out toll message that still can not limit.

The purpose of this utility model is to provide a kind of telephone set of the indiscriminate elongated way of private official telephone phone that can limit with fornicating long-distance limiter, it can prevent to use domestic, the international long-distance telephone of official telephone fornication effectively, thereby the assurance telephone charges only in order to support necessary business contact, is reduced expenses.

The purpose of this utility model is to realize like this.Limiter is serially connected between telephone set and the outside line, needn't does any repacking, just can realize its function telephone set.Can this limiter be made up of computer able to programme, automatic switch and power supply, and automatic switch is serially connected between telephone set and the outside line, and computer able to programme is controlled its break-make, thereby realizes the connecting and disconnecting of control telephone set and outside line, promptly controlled hang and taken on the telephone.Computer able to programme is made up of microcomputer, keyboard display, telephone interface circuit, calendar clock integrated circuit.This limiter before use, by being responsible for responsible people is its programming, promptly give have the right to put through toll telephone the business personnel everyone distribute a password, and with everyone password and allow toll message scope number or concrete telephone number is imported computer able to programme by keyboard, locking then, it is out of the question that locking back other staff want change.During the limiter life's work, computer control automatic switch able to programme often is in on-state.When certain business personnel who has the right to make a long-distance call need be made a long-distance call, need earlier its password to be imported computer able to programme by keyboard, and then on telephone set, dial.The telephone interface circuit of limiter computer able to programme is made up of telephone signal tone circuit and telephone number circuit two parts, the former is processed into digital signal with various tone signal and send microcomputer to differentiate, the latter is processed into binary coded signal with the double-audio signal of dial impulse or dialing, delivers to microcomputer and handles.The password of the signal that computer able to programme detects according to telephone interface circuit and the people's input of making a phone call, verify person in charge director and be input to the password in the computer able to programme and allow conversation scope number by keyboard in advance, according to verifying the connecting and disconnecting that result computer expert able to programme crosses the delivery outlet control automatic switch of interface I/O in the microcomputer.If conform to, computer control automatic switch able to programme keeps connecting, and promptly keeps the connection of telephone set and outside line, guarantees the carrying out of conversation.If do not conform to, computer control automatic switch able to programme disconnects several seconds time approximately, promptly disconnect several seconds time that is connected of telephone set and outside line, this is equivalent to telephone hook switch and is pressed once, at this moment occur dialing tone in the telephone receiver again, thereby limited the connection of non-allowed band toll telephone.In the limiter computer able to programme the calendar clock integrated circuit is housed, itself can carry out the processing until 29 days Februaries in leap year in large and small month automatically, microcomputer can also carry out the daylight-saving time to it and adjust, guarantee that date, time are accurate, thereby can provide date, time at any time for showing, write down and printing, also can provide the duration indirectly, provide indirectly joint, holiday and night half the fee signal etc.In addition, also can the toll message time alarm be set according to the constituent parts service conditions, and the automatic hand-up function, to prevent long and unnecessary phone spending.Keyboard display in the limiter computer able to programme is by keyboard, display, KYBD/display-interface and programming lock are formed, display can show the time at ordinary times, duration and the other side's time difference, display password during programming, allow number, message registration, time, date and cost of the phone call etc., keyboard comprises numerical key and command key, the programming lock is the mechanical electric lock, in its electric terminal circuit or as input port of interface I/O in the microcomputer, only could be when person in charge director opens this lock with key to the limiter input command, carry out password, allow the input of number, revise, print the conversation message registration, adjust the time on date etc., other people do not have key this programming lock of not opening, therefore can only input number as password, can not input command, arbitrarily password is revised in additions and deletions, allow number, message registration, date, time etc.Limiter is the connection of programmable limits local telephone also, abuses this department's phone to prevent the stranger, but the convenience in order to work is not preferably done this restriction during programming, and anyone just needn't be earlier to limiter input password when dialling local telephone like this.When limiter is not received password and verified dial the number into non-toll number, keep the automatic switch connection, promptly keep the connection of telephone set and outside line, not driedly give conversation.During as unit change that the business personnel got in touch, increase and decrease or password leakage, be responsible for the director and can revise and allow connection scope or change password opening programming lock back.

The utlity model has following advantage: do not need telephone set is done any repacking, simply limiter is serially connected between telephone set and the outside line, just can realize the function of international long-distance in the indiscriminate the whole nation of its restriction private official telephone.Limiter is to the conversation of unrestricted scope, to the calling of incoming call all without any influence.Because the telephone signal tone circuit and the input impedance of telephone number circuit of telephone interface circuit are very high in the limiter computer able to programme, therefore, limiter does not produce any influence to telephone set and switch, does not change signal and speech character.Because in the limiter computer able to programme is arranged, the establishment of software makes it that many other functions be arranged.For example its display can show time, date during operate as normal.Daylight-saving time can be adjusted automatically.But display display password, permission number show message registration during programming.Connect when long-distance, can show the duration.Gather cost of the phone call by the half the fee situation of conversing at password, date, time, the other side's number, duration and festivals or holidays, night, be responsible for that the director can open regularly that the programming lock is read by display or by printer prints.This limiter also can be used for limiting the external connection and the use of the non-allowed bands of office equipment such as facsimile machine, teleprinter and even photocopier.

Following embodiment and the accompanying drawing of former reason of the present utility model provides.

Accompanying drawing one is an embodiment block diagram of using the long-distance limiter of fornication according to the telephone set that the utility model provides.

Among the figure: (1)---telephone set; (2)---outside line; (3)---limiter; (4)---computer able to programme; (5)---automatic switch; (6)---microcomputer MC; (7)---keyboard display KD; (8)---telephone interface circuit PHI/O; (9)---calendar clock integrated circuit DT; (10)---power supply; (11)---central processor CPU; (12)---erasable read-only memory EPROM; (13)---random access memory ram; (14)---interface I/O; (15)---keyboard KB; (16)---display DIS; (17)---KYBD/display-interface KDI/O; (18)---programming lock PL; (19)---telephone signal tone circuit PHS; (20)---telephone number circuit PHN; (21)---printer.

Accompanying drawing 2A, AB are the circuit diagram of microcomputer (6) and calendar clock integrated circuit (9).

Accompanying drawing 3A, 3B are the circuit diagram of keyboard display (7).

Accompanying drawing 4A, 4B are when the circuit diagram of telephone signal tone circuit (19), telephone number circuit (20) and automatic switch (5).

A, B two parts of accompanying

drawing

2,3,4 are connected with the wire size of same coding.

Limiter (3) is made up of computer able to programme (4), automatic switch (5) and power supply (10).Automatic switch (5) is serially connected between telephone set (1) and the outside line (2), and its break-make is subjected to computer able to programme (4) control.Computer able to programme is by MC(6), KD(7), PHI/O(8), DT(9) form.MC(6 wherein) comprise CPU(11), EPROM(12), RAM(13), I/O(14) etc.KD(7) comprise KB(15), DIS(16), KDI/O(17), PL(18).PHI/O(8) be divided into PHS(19) and PHA(20) two parts.

MC(6) CPU(11 in) according to being solidificated in EPROM(12) in monitoring program control each several part operate as normal.Be responsible for the director and open PL(18) when programming, pass through KB(15) input each business personnel's password and allow conversation scope number, these passwords and number are deposited in RAM(13) in.After programming finishes, be responsible for the director and shut PL(18), after this limiter does not react depressing of command key, so other staff want to change password and number is out of the question.During limiter (3) life's work, computer able to programme (4) control automatic switch (5) often is in on-state, thereby telephone set (1) and outside line (2) are connected, and guarantees inner dialing at any time and outside normally carrying out of calling out at any time.When the business personnel is made a long-distance call, need earlier at KB(15) go up its password of input, go up at telephone set (1) then and dial the other side's number.CPU(11) pass through KDI/O(17) the reception password, pass through PHI/O(8) receive from PHN(20) telephone number, CPU(11) pass through KDI/O(13) in password and allow number to compare, if conform to, computer able to programme (4) control automatic switch (5) keeps connecting, and does not interfere conversation.If do not conform to, computer able to programme (4) control automatic switch disconnects several seconds time approximately, promptly disconnects be connected several seconds approximately of telephone set and outside line, and this suitable telephone hook switch is pressed once, thereby has stoped the connection of non-allowed band toll telephone.

PHS(19) can do preliminary treatment to the telephone signal tone signal, various tone signal are become binary digit.Pass through I/O(14 then) send CPU(11), judge it is dialing tone, ringing tone, busy(-back) tone or howler tone etc. by CPU, thereby determine next step work of computer able to programme (4).

Owing in the computer able to programme (4) calendar clock integrated circuit DT(9 is arranged), so limiter internal clock calendar can for a long time accurately carry out, it can carry out the processing of big solar month of 30 days and 29 days Februaries in leap year automatically, MC(6) can also carry out the daylight-saving time and adjust.The display (16) of limiter (3) can show the time at ordinary times, can show the duration when connecting phone, provides overtime demonstration.Limiter can also comprise that password, date, time, the other side's number, duration, night festivals or holidays half the fee etc. gathers tabulation to the message registration content.Be responsible for the director and regularly open programming lock (18), pass through KB(15) input command allows limiter show or uses the printer prints foregoing.

MC(6 in the present embodiment) circuit is shown in accompanying drawing 2A, AB.Wherein U1 is a single-chip microcomputer 8749, and it has comprised CPU(11), EPROM(12) and a part of RAM(13)---128 bytes.U2, U3 are two 6264, make RAM(13) expand to the 16K byte, enough capacity storage passwords are so just arranged, allow number and telephony recording.U7 is a latch, 40H373; U8 is the bus transfer device, 40H245; U9 is a bus driver, 40H367.I/O(14) P1 mouth, P2 mouth and two 8243(U4, U5 on the U1 sheet have been comprised).Accompanying drawing 2A also comprises U6---calendar clock integrated circuit (9), it has adopted MSM5832.Accompanying drawing 2B goes up CN1 and connects toward KD(17), CN2 connects toward printer (21).

The circuit of keyboard display in the present embodiment (7) is shown in accompanying drawing 3A, 3B, KB(15) comprise set of number key 0～9 and Management Information Base key, comprising C---password, N------reading PR---prints to allow number, R, D---the date, T---the time, DEL---eliminate CR---order finishes.When PL(18) contact P10 connected, command key was pressed and is read and notify MC(6 by KDI/O), command key is then inoperative during disconnection.Therefore, except that being responsible for the director, other people can not additions and deletions revise password, allow number, date, time, can not read password, number, and can not control printing.DIS(16) 8 LED charactrons are arranged.U13 is KDI/O(17), adopt 8279, U14 is decoder 74LS156.

PHS(19 in the present embodiment), PHN(20) and automatic switch (5) be shown in accompanying drawing 4A, 4B.The last middle part of accompanying drawing 4A, 4B is PHS(19), it is by attenuator (R1, P1, R2), impedance transformer (U15-1), band pass filter (U15-2, detecting circuit (D5), amplifier (U15-4), this schmitt trigger (U16), three monostable trigger-action circuits (U18-1, U-1, U-2), counter compositions such as (U20).It is to tone signal filtering, amplify, after the detection in self counting set time tone signal have to not having and not having to the number of times that two-way variation is arranged, the binary number that obtains send microcomputer (6), judges the character of tone signal by its.Accompanying drawing 4 bottoms are PHN(20), it is made up of attenuator (R3, P2, R4), impedance transformer (U21-1), amplifier (U21-2), telephone number encoder (U22), latch (U23), trigger (U24) etc.PHN(20) send telephone number encoder (U22) after dialing signal is done preliminary treatment, it is a binary code with dial impulse or dual-tone dialing signal encoding, send latch (U23) to latch.Trigger (U24) is used for notice MC(6 when U23 has the coding of newly dialling the number) read this coding, MC(6) after reading coding, trigger (U24) is resetted.Telephone number encoder (U22) adopts M959(dual-tone dialing system) or M957(pulse dialing system) integrated circuit.Accompanying drawing 4 foots illustrate automatic switch (5) and the break-make of telephone wire are controlled situation, adopt relay (RY) in the present embodiment.

Power supply in the present embodiment (10) schematic diagram as shown in Figure 5.It sends V-RY to civil power after power transformation depressor (T) transformation, rectifier filter RF rectifying and wave-filtering, for relay (automatic switch) work.V-RY is V-D=+5V through pressurizer (R) voltage stabilizing, to the complete machine power supply, provides V-B simultaneously.When mains failure, available battery case B1 inserts by broadcasting a CN, guarantees the complete machine operate as normal.When night unattended phone not the time spent can cut off the electricity supply, this moment V-D=0, single-way switch (S) cuts out, B2 provides V-B, guarantees calendar clock integrated circuit (9) continuous operation, guarantees RAM(13) in data do not lose.

The present embodiment front panel as shown in Figure 6, wherein P-ON is a power supply indicator, 8 LED charactrons are DIS(16), PL is programming lock (16), and UT is overtime indicator light, and HF is the half the fee In-use indicator, ECI is for allowing input password indicator light, and other is numerical key and command key.

Claims

1, a kind of telephone set is with fornicating long-distance limiter, it is characterized in that this limiter (3) mainly is made up of computer able to programme (4) and automatic switch (5), automatic switch is serially connected between telephone set (1) and the outside line (2), computer able to programme (4) is controlled its break-make by the delivery outlet of interface I0 (14) in the microcomputer (6), thereby realize the connecting and disconnecting of control telephone set and outside line, promptly controlled and to have hung logical the other side's phone.

2, limiter according to claim 1 is characterized in that computer able to programme (4) is made up of microcomputer (6), keyboard display (7), telephone interface circuit (8), calendar clock integrated circuit (9) in the limiter (3).

3, limiter according to claim 1, it is characterized in that the telephone interface circuit (8) in the limiter computer able to programme (4) is made up of telephone signal tone circuit (19) and telephone number circuit (20) two parts, the former is processed into digital signal with various signal tones and send microcomputer (6) to differentiate, the latter is processed into binary coded signal with the double-audio signal of dial impulse signal or dialing, delivers to computer (6) and differentiates.

4, limiter according to claim 1, it is characterized in that computer able to programme (4) internal keyboard display (7) is made up of keyboard (15), display (16), KYBD/display-interface (17) and programming lock (18), wherein, programming lock (18) is the mechanical electric lock, its electric terminal is serially connected in the command key circuit, or as interface I/O(14 in the microcomputer (6)) input port.

5, limiter according to claim 1 is characterized in that being equipped with in the limiter computer able to programme (4) calendar clock integrated circuit (9).