JP3045587B2 - Telephone exchange method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to an ID for a magnetic card or the like.
The present invention relates to a telephone exchange system for performing telephone exchange service using a card.

[0002]

2. Description of the Related Art In recent years, private branch exchanges having a function of permitting outgoing calls from office lines and managing individual call charges have been widely used.

Conventionally, such a private branch exchange gives an ID number to each individual, permits dialing by dialing the ID number before calling the office line, and collects call charges corresponding to the ID number to obtain the office line number. Permission for outgoing calls and management of individual call charges were being performed.

[0004] As another method, a magnetic card telephone having a magnetic card reader mounted on a telephone of a key telephone apparatus is used, and the telephone and the exchange are connected by a 4-wire cable composed of a data line and a communication line. doing. And
Individual ID in advance on the magnetic stripe of the magnetic card
Distribute the number with the number written to the user, read the magnetic card when making a call, and use the data line to send the ID.
The number was notified to permit outgoing calls, and the call charges were tabulated for the ID number.

[0005] Japanese Patent Application Laid-Open No. Sho 60-103864 discloses such a technique.

[0006]

However, in the former method of the prior art, there is a possibility that the ID number may be known to others, and that the ID number may be used improperly.

In the latter method, unauthorized use becomes difficult by using a magnetic card, but two pairs (4 pairs) consisting of a data line and a communication line are provided between the exchange and the telephone.
(Wire system). That is, ID
When the card is mounted on the telephone and the information stored in the ID card is transmitted to the exchange, the information is transmitted via a data line. Other controls are also performed by transmitting and receiving data via data lines.

Therefore, it is necessary to make the telephone interface circuit on the exchange device side compatible with the 4-wire format according to the configuration and functions of the telephone. Therefore, there has been a problem that the cost of the exchange device is increased.

[0009] It is an object of the present invention to connect a telephone and a switching device by an analog two-wire system, to make the switching device a simple configuration, and to permit a transmission of an office line and to manage individual call charges. Is to provide.

[0010]

According to the first aspect of the present invention, a predetermined
A portable storage medium for storing information ; a terminal device;
Terminal device via a communication line, and call
And supply connection information based on connection information from the terminal device.
And a switching device having means for calling the office line.
In the talk exchange system, the terminal device is connected to the communication line.
Rectifying means for rectifying the call current,
A rectifier having a positive terminal and a negative terminal, a handset, a communication means for connecting the handset to the communication line, a reading means for reading the predetermined information from the portable storage medium , and Control means for controlling the communication means and the reading means, the positive electrode terminal and the negative electrode
Power supply connected in series with the
Supply means, wherein the control means and
Power supply for generating power to supply to the reading means
Means .

[0011]

According to the above arrangement, the terminal device can generate a power supply for reading desired information from the portable storage medium without interrupting the call by the normal call current obtained from the switching device. In addition, this allows information stored in the portable storage medium to be sent to a switching device having a normal line circuit.

[0012] Thus, the telephone and the exchange are connected by the analog two-wire system, and the exchange is provided with a simple configuration to provide a telephone exchange system capable of permitting outgoing line transmission and managing individual call charges. be able to.

[0013]

Embodiments of the present invention will be described below in detail with reference to the drawings.

§1 System Configuration FIG. 1 is a system configuration diagram of the present invention. In FIG. 1, a telephone 1 with a magnetic card reader is a two-wire cable 2.
Is connected to a line circuit (LIN) 3 for controlling the telephone 1 with a magnetic card reader. The line circuit 3 is accommodated in a communication path switch (SW) 4 for performing call exchange connection. The communication line switch 4 houses a central office trunk (COT) 5 for interfacing with a public line, and the office trunk 5 is connected to a public network 11. Further, the communication path switch 4 is connected to the DTMF (D
ual Tone Multi Frequency)
D for receiving a signal and analyzing the received DTMF signal
A TMF receiver (DTMF-REC) 6 is accommodated.

Here, the communication line switch 4, the line circuit 3, the central office trunk 5, and the DTMF receiver 6 operate under the control of a central controller (CC) 7, and the central controller 7 The control is performed in accordance with programs, station data, and various tables stored in the storage device (MM) 8. It also includes a billing device (KP) 9 for managing telephone call charges on the public line, and the billing device 9 performs billing processing for each magnetic card. Also,
The central control device 7, the storage device 8, the billing device 9, and the communication line switch 4 are connected to a control system bus 10, and various control data are transmitted and received through the control system bus 10. The line circuit 3, the office trunk 5, and the DTM
Each of the F receiving devices 6 is logically connected to the central control device 7 although not shown.

The line circuit 3 is a circuit for connecting a normal analog telephone having a call current supply function, a calling signal transmission function, a loop monitoring function, a digital signal / analog signal conversion function, a hybrid function, and the like.

As described above, the system configuration of the present invention is as follows.
The devices other than the telephone 1 with a magnetic card reader are hardware conventionally used, and are configured to accommodate the telephone 1 with a magnetic card reader in an analog two-wire system.

§2 Configuration of Telephone with Magnetic Card Reader 2.1 External View of Telephone with Magnetic Card Reader FIG. 2 is an external view of the telephone 1 with magnetic card reader.
In FIG. 2, a telephone set 1 with a magnetic card reader has a handset 101 for talking with the other party, a magnetic card reader section 102 for reading a magnetic card, and a second position section 10 for inserting a magnetic card for continuous transmission.
3 and a card lamp 1 which is a display indicating the state of the telephone
04, Incoming call lamp 1 that displays a visual indication of incoming calls
05, dial button 10 for dialing the other party's telephone number
6. A hooking button 107 used for receiving various services of the telephone exchange, and a reception volume button 108 for controlling the reception volume of the handset are provided.

2.2 External View of Magnetic Card FIG. 3 is an external view of a magnetic card used in the telephone 1 with a magnetic card reader. The appearance of the magnetic card 30 is as follows.
It conforms to JIS standard X6301. The magnetic card 30 has a magnetic stripe 31 whose recording method conforms to JIS standard X6302II. (Details will be described later)

2.3 Functional Block of Telephone with Magnetic Card Reader 2.3.1 Configuration of Functional Block FIG. 4 is a functional block diagram of the telephone 1 with magnetic card reader.

In FIG. 4, a ringer circuit (R) for making a speaker (SP) 113 sound by an incoming signal (IR signal) from a line terminal 143 for connecting a 2-wire analog line and for turning on an incoming lamp 105 is provided.
G) 112, a switch circuit (S
W) 130, a communication circuit (SPC) 117 for transmitting / receiving a line voice signal via the switch circuit 130, a communication circuit 11
Switch circuit (S) for switching the received voice from
W) 116, a handset 101 for converting a received voice obtained through the switch circuit 116 into voice, and connecting either a voice transmitted from the handset 101 or a DTMF signal from the DTMF generating unit 123 to the communication circuit 117. A switch circuit (SW) 118 is included. Note that the communication circuit 117, the switch circuit 116, and the switch circuit 118 are included in the communication control circuit 115.

A control device 109 including a DTMF signal generator 123 is provided.
The switch circuit 116 and the switch circuit 118 are controlled by the control device 109.

Further, a magnetic card reader (MC) for reading information of the magnetic stripe 31 of the magnetic card 30
R) 110, a waveform shaping circuit (W) that shapes a pulse waveform so that the control device 109 can easily process a read pulse from the magnetic card reader 110 and sends it to the control device 109.
F) 144, a dial button 106 as a telephone keyboard, a hooking button 107 for transmitting a hooking signal to a line, and a receiving volume button 10 for adjusting a receiving volume.
8. Hook switch (HS) 111, IR from line
An incoming call detection circuit (IR) 120 for detecting a signal, a timer circuit 1 activated by a signal from the incoming call detection circuit 120 and notifying the control device 109 of an incoming call after a predetermined time has elapsed.
21 and the magnetic card 3 in the second position section 103.
0 is detected, and that information is
9 is provided with a card detection circuit 122 for notifying the notification.

Further, it is controlled by the control device 109,
A buzzer (BZ) 119 for transmitting an error tone and a keyboard touch tone when an error occurs when a magnetic card is read and cannot be processed, and a card lamp 104 for displaying the states of the magnetic card reader 110 and the control device 109. Have been.

2.3.1 Operation (Function ) of Function Block Hereinafter, the operation will be described.

When the user raises the handset 101, the hook switch unit 111 is turned on, and the control unit 1
09, to detect the off-hook. Then, the control device 10
9 controls the switch circuit 130 to close so that DC current flows from the line terminal 143 to the communication circuit 117. Further, the control device 109 controls the switch circuits 116 and 118 so that the handset 101 can listen to the reception voice of the line. Further, a display is made to notify the user by turning on the card lamp 104 that the magnetic card reader 110 can read.

When the user causes the magnetic card reader 110 to read the magnetic card 30, the control device 109
The information stored in the magnetic card 30 is read via the waveform shaping circuit 144. The magnetic card 30 has a personal I
The control device 109 extracts a predetermined personal ID portion from a series of card information. Next, the control device 109 turns off the switch circuit 116 and switches the switch circuit 118
Is switched to the DTMF generation unit 123 side, and the handset 101 is disconnected from the line.

Next, as described above, the user or other individual I
In a state where the DTMF signal of D is not heard, the DTMF generation unit 123 causes the DTMF signal to be transmitted from the DTMF generation unit 123 to the switch circuit 118, the call circuit 117, and the switch circuit 130.
The DTMF signal is sent out to the line via.

The operation other than the above will be described in detail in section 3 below.

2.4 Block Diagram of Telephone with Magnetic Card Reader FIG . 5 is a circuit block diagram of a telephone with a magnetic card reader.

Since the telephone with a magnetic card reader of the present invention is a two-wire analog telephone that can be connected to the line circuit 3, it is configured to operate only with the talk current supplied from the line terminals 140 and 141. The call current value is determined by the line circuit of the telephone exchange, but is generally about 30 mA.

Usually, the telephone has a call current of 20 to 120 mA.
Is configured to work properly in
It must be configured to operate at least at 20 mA. In the present embodiment, a telephone with a magnetic card reader in which operation is possible at 15 mA in view of safety will be described in detail. Therefore, the telephone with the magnetic card reader according to the present embodiment is configured so that the current consumption is appropriately distributed. Hereinafter, this will be described in detail.

The magnetic card reader 110 operates with a power supply of 5 V, and requires a power supply voltage of 5 ± 0.25 V for normal operation.
The voltage is obtained by connecting in series with 15.

In order to stabilize the voltage applied to the magnetic card reader 110, a shunt regulator (SR) 1
35 is connected in parallel with the magnetic card reader 110.
As a result, the main call current from the line terminal 140 is reduced by the diode bridge 124 for depolarizing the line, the switch circuit 130 for transmitting a hooking pulse, and the call control circuit 11.
5 flows to the line terminal 141 via the shunt regulator 135, the card lamp 104, the magnetic card reader 110, and the control device 109.

The distribution of the consumed current is as follows.

The magnetic card reader 110 has 5 mA, the card lamp 104 has 3 mA, and the control device 109 has 3 mA. The current consumption in other circuits is small. Therefore, the total consumed current is 11 mA, and the remaining current is consumed by the shunt regulator 135. The current consumed by the shunt regulator 135 itself is 1 mA, and the terminal voltage is kept constant at 5.6 V if a current larger than this is flowing.

Since the telephone with a magnetic card reader of this embodiment is an analog telephone, the line terminals 140, 14
There is a case where another telephone is branch-connected to one. Therefore, the configuration is such that the current of the control device 109 and its peripheral circuits does not flow backward by the diode 132. Further, a battery 138 is provided to maintain a voltage, and a voltage is applied to the control circuit 109 via a diode 137 for preventing backflow. Thus, even if the call current fluctuates due to some trouble, the telephone can always operate normally.

When a telephone is branch connected to the line terminals 140 and 141, the output of the waveform shaping circuit 144 is cut off by the voltage detecting circuit (D) 133 by the switch circuit 134 so that abnormal voltage is not applied to the control device 109. I have to. When a hooking pulse is transmitted, the switch 130 is turned off to generate a break pulse. However, the constant current switch circuit 129 is controlled to prevent the battery 138 from being consumed, and the current is controlled by the control device 109 together with the backflow prevention diode 131. Controlling.

When the hook switch unit 111 is in the on-hook state, the control device 109 stops operating, so that the current consumption of the telephone becomes 1 μA or less, and the voltage and current are controlled by the resistor 127, the backflow prevention diode 128 and the constant voltage diode 139. To prevent the battery 138 from being consumed.

Further, the line voltage is detected by a voltage detection circuit (VD) 126, and when the telephone is not connected to the line, the operation of the hook switch unit 111 is invalidated to prevent the consumption of the battery 138.

2.5 Circuit Diagram of Telephone with Magnetic Card Reader FIGS . 7 to 14 are circuit diagrams of the telephone with a magnetic card reader of the present invention, and show the configuration of the block diagram shown in FIG. 5 in more detail. ing. FIG. 6 is a diagram showing the arrangement of the circuit diagrams shown in FIGS.

7 to 14, the control device 10
Reference numeral 9 denotes a 4-bit one-chip microcomputer with a built-in DTMF, which normally operates with a current consumption of 3 mA as described above.

A ringer circuit 112 is connected between the line terminals 140 and 141 via a capacitor C0.
The ringer circuit 112 includes a diode bridge DB1
, Capacitor C1, and Zener diodes ZD1, ZD
D2, thereby rectifying the incoming signal. The incoming call lamp (LR) 105 is provided in series with a line via a diode bridge DB1 together with the zener diode ZD0, and is configured to light up when there is an incoming call. The ring tone generator (IC0) is provided so that the rectified incoming signal is supplied to the power supply terminal Vcc so as to operate with the power of the rectified incoming signal. A capacitor C is connected to the output terminal (OUT) of the ring tone generator (IC0).
The speaker 113 is logically connected via the transformer 59, C4, and the transformer T, and a predetermined ringtone is transmitted when the ringtone generator (IC0) is on. As a result, when an incoming signal is applied to the line terminals 140 and 141, a ring tone for notifying the incoming call is output from the speaker 113.

Further, a photocoupler PC is provided in parallel with the capacitor C59, and a ring tone generator (IC
0) is in the ON state, that is, when the incoming signal is being applied, the switching transistor Q2 of the timer circuit 121, the NOT gate IC2-4 and the peripheral circuits shape the waveform, and the shaped output signal is controlled by the control device. 109 IR
Apply to terminal. Thereby, control device 109 can detect an incoming call. Further, an output signal from the timer circuit 121 controls the switching transistor Q1 to be turned on, and is sent to the HOLD terminal of the control device 109 via the NOT gate IC2-3. Here, when the control device 109 detects a signal from the HOLD terminal,
The state is changed from the hold state in which current consumption is suppressed to the normal state, and the control program is executed.

The coil L0 and the coil L1 are connected to a terminal 701 for connecting another terminal device at a branch.
This makes it possible to branch-connect the facsimile apparatus or the like, and, when making a call, first make an outside line call with the telephone 1 with a magnetic card reader and the other party answers, and then switch the connection to the facsimile apparatus to form a communication path. . Therefore, a normal facsimile machine can be directly connected to a switching device that regulates transmission by a magnetic card.

As described above, the constant current switch circuit 129 is controlled by the control device 109 when transmitting the hooking pulse. At the same time, a high voltage is applied to the positive output terminal of the diode bridge 124. It is configured to be turned on at the time. That is, the switching transistor Q33 is turned on by the incoming signal, and the Zener diode ZD that allows the current to pass at a high voltage.
14, diode 131 and zener diode ZD1
5 is passed through. Therefore, when the incoming signal is applied between the line terminals 140 and 141, the control device 109 receives a voltage,
A current can be applied.

The switching circuit 130 includes a switching transistor Q32 connected to the positive output terminal of the diode bridge 124 via the hook switch hs. The transistors Q29, Q30 and Q31 and their peripheral circuits are for driving the switching transistor Q32.
It operates with a control signal from the N terminal. Thus, the switch circuit 130 operates under the control of the control device 109.

The call control circuit 115 includes a call control device IC
5 and comprises the call control device IC5 and its peripheral circuits. The handset 101 is connected to the call control device IC5,
Is connected via a switch circuit 130 (signal line VL). The call control device IC5 is provided with a changeover switch 118.
8 to send a DTMF signal to the line side. DT
The MF signal is generated in the control device 109, transmitted from the TONE terminal, and output to the DT terminal of the communication control device IC5 via the amplifier transistor Q25. Further, the changeover switch 118 of the call control device IC5 is controlled by a signal input to the MUTE terminal. Call control device IC
The MUTE terminal of the control device 109 is connected to the MUTE terminal of No. 5, and the changeover switch 118 operates under the control of the control device 109.

The switching circuit 116 includes a switching transistor Q34.
On and off operations are performed based on an output signal from the T terminal. Thereby, the receiving line of the call control device IC5 can be fixed to the reference voltage (VR) and the receiving circuit can be disconnected from the line. For example, when the DTMF signal is transmitted to the line, the DTMF signal leaks to the handset 101 side. It is possible to control not to do so. The transistor Q24 is simultaneously turned off based on the output signal from the CDMT terminal of the control device 109, and the receiving line can be completely muted.

Next, the ground terminal (GND) of the call control device IC5 is connected to the control transistor Q12 of the shunt regulator 135, and the logic circuit section (control device 1)
09 and its peripheral circuits, the magnetic card reader 110, the waveform shaping circuit 144 and its peripheral circuits, etc.). Thus, the call control circuit 115
And the logic circuit unit are connected in series, and the call control circuit 115
, The entire communication current is supplied, and the logic circuit section at the subsequent stage shunts the current to each device, thereby reducing current consumption.

As described above, the shunt regulator 135 is a circuit for generating a constant-voltage power supply to be supplied to the logic circuit based on the current from the communication control circuit 115.
It comprises a voltage control transistor Q12 and a peripheral circuit including a Zener diode ZD4.

A high-resistance resistor (R115) 1 is connected between the positive terminal and the negative terminal of the diode bridge 124.
27 and a series circuit of a Zener diode (ZD15) 139 are connected. A diode (D17) is connected from the connection point between the resistor R115 and the Zener diode ZD15.
Voltage and current are supplied to the control device 109 via 128. Thus, when the hook switch unit 111 is in the on-hook state, a very small current (about 30 μA) is supplied to the control circuit in the hold state, and the consumption of the battery (BAT) 138 is prevented.

A voltage detection circuit 126 is connected to a connection point between the resistor R115 and the Zener diode ZD15 via a resistor R114. The voltage detection circuit 126 includes a switching transistor Q0, and is turned on and off by a voltage at a connection point between the resistor R115 and the Zener diode ZD15. The ON / OFF signal of the switching transistor Q0 is output to the LIN terminal of the control device 109 via the NOT gate IC 2-1 and is notified to the control device 109. Here, when the LIN terminal is “0”, that is, when no voltage is applied to the positive terminal of the diode bridge 124, the control device 109 determines that the telephone is not connected to the line, The control device 109 is forcibly set to the hold state by a program, and is set so as not to consume power.

Further, the ON / OFF signal of the switching transistor Q0 controls the hook switch unit 111,
When no voltage is applied to the positive terminal of the diode bridge 124, the operation of the hook switch hs is invalidated. When the telephone is not connected to the line, the control device 109 keeps the hold state even if the handset is off-hook. I try to keep it. Thereby, the battery (BAT) 13
8 is prevented from being consumed.

The card lamp 104 is turned on and off by a switch circuit 136 controlled by the control device 109. The switch circuit 136 includes switching transistors Q14 and Q15, and turns on and off according to a signal from the LED terminal of the control device 109. Thereby, the card lamp 104 is controlled by the control device 1.
Lighting and extinguishment are performed under the control of 09.

The battery (BAT) 138 is connected to the control device 109.
Is a backup power supply supplied to the
Control device 109 only when power is not supplied from 141
Power is being supplied. As described above, the battery 138 is connected to the control device 109 via the diode 137 to prevent the current from flowing backward.

The card detection circuit 122 is provided with a switch MSW for detecting that a magnetic card has been mounted. A switch transistor Q4 is connected to one end of the switch MSW. The switch transistor Q4 is connected to the SCPS0 terminal of the controller 109 and the SCPS0 terminal.
The scan output signal from one terminal is supplied to a NOT gate IC2-
5, receiving via the IC 2-6, thereby performing on / off operation. On the other hand, at the other end of the switch MSW,
Switching transistor Q22 which is turned on and off by opening and closing switching transistor Q4 and switch MSW
Are logically connected to the key scan input K1 terminal of the control device 109 via the drive transistor Q21. Thereby, the control device 109
The control device 109 reads a scan input signal generated based on the state of the switch MSW and a scan output signal from the SCPS0 and SCPS1 terminals of the controller 109 to detect whether a magnetic card is mounted in the second position unit 103. .

The dial buttons 106 include "0" to "9" keys, "#" key and "*" key. The control device 109 responds to the key scan output signals output from the KS0, KS1 and KS2 terminals with K0, K
The key scan input terminals 1, 1, 2 and 3 detect key information and recognize key press information.

Similarly, the hooking button 107 and the receiving sound volume button 108 are scanned by the control device 109, and processing according to the key information is performed. For example, the control device 10
9 recognizes that the hooking button 107 has been pressed, LP
A control signal is transmitted from the ON terminal to control the switch circuit 130, and a flash signal is transmitted to the line. Further, upon recognizing that the receiving volume button 108 has been pressed, a control signal is transmitted from the RAMP terminal to output the gain control transistor Q23.
And set the gain of the reception volume.

The magnetic card reader 110 is the magnetic card 30
Is read from the control device 10 via the waveform shaping circuit 144 and the switch circuit 134.
9 and sends the information.

The switch circuit 134 includes the voltage detection circuit 13
3 is controlled. The voltage control circuit 133 includes a voltage detection transistor Q11, turns on and off based on the voltage of the power supply supplied to the waveform shaping circuit 144, and detects that an abnormal voltage is generated. The transistors Q8, Q9 and Q10 of the switch circuit 134
When the voltage of the power supply supplied to the waveform shaping circuit 144 becomes an abnormal value when the voltage detection transistor Q11 is turned on or off according to the on / off state of the voltage detection transistor Q11, the control device 109 sends the information of the magnetic card Is not sent. This allows the control device 109 to receive information only when there is a guarantee that the circuit for reading information on the magnetic card is operating normally, thereby improving security in reading information on the magnetic card and increasing the abnormal voltage. This prevents the control device 109 from being destroyed.

The waveform shaping circuit 144 shapes the pulse signal sent from the magnetic card reader 110 so that the control device 109 can easily read the pulse signal. This is because the control device 109 controls the 4BI
T microcomputer, so the machine cycle is 8.
Since the processing speed of the program is slow as 3 μS, the waveform is shaped so that the signal transmitted by the magnetic card reader corresponds to the processing speed of the program. The waveform shaping circuit 144 will be described later in detail.

FIGS. 25 and 26 show the control device 10
FIG. 9 is a diagram showing the functions of the terminals provided in 9 and the meaning of signals.

As described above, the circuit of the telephone with the magnetic card reader is configured.

2.6 Description of Waveform Shaping FIG. 15 is a diagram showing a waveform shaping circuit.

In FIG. 15, the magnetic card reader 110
The signal terminals output from the input terminal and input to the waveform shaping circuit 144 include a clock input terminal (CLK) 1504, a data input terminal (RDT) 1505, and a gate input terminal (CS).
1506.

The clock signal 1504 is processed by the one-shot multi-circuit IC 3-1 having a time constant by the resistor R31 and the capacitor C18, and sent out to the clock output terminal 1501. The data signal 1505 has a resistance R
One-shot multi-circuit IC3-2 having a time constant of 35 and capacitor C19, and NAND gate IC
The data is processed by 4-1 and sent to the data output terminal 1502. The gate signal 1506 is output from the NAND gate IC4
-4, the logic is inverted, and the gate output terminal 150
3 is sent. The one-shot multi-circuit IC3-1 can be operated by the NAND gates IC4-2 and IC4-3 constituting the RS flip-flop.

Hereinafter, the operation of the waveform shaping circuit will be described with reference to the diagram showing the waveform shaping circuit shown in FIG. 15 and the timing chart shown in FIG.

First, an output signal from the magnetic card reader 110 becomes an input signal of the waveform shaping circuit 144 as an output compliant with JIS standard X6302II, and the waveform is converted into a clock input signal 1504 and a data input signal 150.
5 and the gate input signal 1506.

When the gate input signal 1506 is "1", the output of the NAND gate IC4-4 is "0", so that the one-shot multi-circuits IC3-1 and IC3-2
Reset terminals R1 and R2 are in a reset state, and the one-shot multi-circuits IC3-1 and IC3-2 do not operate. Therefore, the clock output terminal 1501 is
"0" means no clock.

As for the data output terminal 1502, the data input terminal 1505 is "1" and the one-shot multi IC 3-2
Is "1", the NAND gate IC4-1
Output "0" and there is no data.

Further, a NAND gate circuit IC4-2,
The output terminal 1507 of the RS flip-flop constituted by the IC 4-3 is reset to "0", and does not trigger the one-shot multi-circuit IC3-1.

When the magnetic card 30 is read in this state,
The gate input terminal 1506 changes from “1” to “0” and N
The output of the AND gate IC4-4 changes from "0" to "1", and the reset terminals R1 and R2 are set to "1", so that the one-shot multi-circuits IC3-1 and IC3-2 can operate. Further, "1" is input to the NAND gate IC4-3.
, The NAND gates IC4-2 and IC4
The -3 RS flip-flop has both inputs at "1", and is in an operating state.

Here, when the data falling 1602 enters the data input terminal 1505, "0" is applied to the NAND gate IC4-2, and the RS flip-flop output terminal 1
"1" is set to 507, and thereafter, the gate input terminal 1
This state is maintained until 506 becomes “1”. As a result, the one-shot multi-circuit IC 3-1 enters a state in which a trigger can be made, and at the same time, “1” is output to the data output terminal 1502, and a state with data exists.

Next, when a clock falling 1601 is applied to the clock input terminal 1504, a trigger is applied to the one-shot multi-circuit IC3-1, and a pulse of "1" is clocked according to the time constant of the resistor R31 and the capacitor C18. Output to the output terminal 1501.

Further, when the clock output terminal 1501 becomes "1", the one-shot multi-circuit IC 3-2
When the data input terminal 1505 is "0", a pulse of "1" is transmitted in accordance with the time constant of the resistor R35 and the capacitor C19, applied to the NAND gate IC4-1, and the data output terminal 1502 is set to "1". ".

When the data input terminal 1505 of the one-shot multi-circuit IC3-2 is "1", no trigger is activated, so that the data output terminal 1502 maintains the state of "0".

In this manner, while the gate input terminal 1506 is "0", the one-shot multi-circuits IC3-1 and IC3-1
3-2 continues to operate, and the clock output terminal 1501 and the data output terminal 1502 transmit data at the timing shown in FIG.

Thereafter, "1" is input to the gate input terminal 1506.
Is applied, the one-shot multi-circuit IC3-1,
"0" is applied to the reset terminals R1 and R2 of the IC 3-2, and the NAND gates IC4-2 and IC4-
3 RS flip-flop output terminal 1507 is “0”
And the operation ends.

The following problems are solved by adding the circuit described above.

(1) A clock and a pulse width of data sufficient for causing the one-chip microcomputer used in the control device 109 to read the magnetic card data are obtained.

In this embodiment, the pulse width of the clock and data required for the one-chip microcomputer is required to be two machine cycles, that is, 16.6 μs or more. The output is extended to a pulse width of about 30 μs.

(2) In the output of the magnetic card reader 110 as it is, a clock is also sent before valid data, so it is necessary to perform a blank reading until the beginning of the read data is found by the program. However, since the amount of programs is increased and the processing speed is reduced, such a microcomputer for a two-wire analog telephone does not reach a practical level.

The beginning of the data is based on JIS standard X63
Since it is "FF" in hexadecimal according to the 02II type, cueing is always possible.

2.7 Explanation of Card Data Structure FIG. 17 is a diagram showing an embodiment of the format of the card data of the magnetic card 30.

In this embodiment, JISX standard 6302I
The example is based on the I type, and the whole is composed of 72 characters.
4 is “FF” in hexadecimal.

For the second to fifth characters, a four-digit number is stored as information (personal ID) 1702 for identifying an individual.

It is apparent that the personal ID 1702 may be anywhere within the 2-70 characters, and that the character length can be freely set.

FIG. 18 is a diagram showing one embodiment of the correspondence between the card data and the DTMF signal.

The card data is a 7-unit code of JIS C6220, and the DTMF signal is used in a general public line.

With this configuration, the telephone with card reader 1
Is the personal ID 1702 stored in the magnetic card 30
(FIG. 17) is converted into a DTMF signal according to the relationship shown in FIG. 18, and a signal 1701 is added to the line and transmitted.

2.8 Description of DTMF Signal Transmission Sequence FIG. 19 is a diagram showing a DTMF signal transmission time chart.

The operation procedure will be described below with reference to the external view shown in FIG.

First, the handset 101 is picked up, and the magnetic card 30 is manually slid into the magnetic card reader 110 to be read. That period is the card data reading time 1901. Thereafter, the telephone 1 checks whether the card data is correct, and checks the horizontal and vertical parity.
This time is a check time 1902. In this embodiment, the check time is set to 300 ms so that the user does not care.

Next, an initial signal 1904 is sent to the line. This may be, for example, any one of A, B, C and D of the DTMF signal, and it is important that the signal cannot be transmitted by the dial button 106.

Next, the personal ID 1905 in the card data specified in advance is transmitted to the line.

Next, on the private branch exchange side, the received personal ID
Check 1905, take a time (pause) 1906 to absorb the determination time for permitting the office line transmission, and send the office line transmission special number 1907 to the line if the user has already dialed the office line transmission special number. . Here, if the dial is not performed, the time of the pause 1906 becomes longer. In this embodiment, the time of the pause 1906 is set to a minimum of 500 ms.

Next, a time (pause) 1908 until the private branch exchange supplements the office line is taken, and if the user has already dialed the other party's telephone number, the other party's telephone number 1909 is sent out to the line. Here, if the user is not dialing, the time of the pause 1908 becomes longer. In this embodiment, the time of the pause 1908 is set to a minimum of 1 second.

FIG. 20 is a diagram showing a transmission timing chart of the DTMF signal at the time of continuous transmission.

Here, as described with reference to FIG. 19, the continuous transmission means that the magnetic card 30 is read without reading the magnetic card 30 each time the local line is transmitted, and then the magnetic card 30 is stored in the second position unit 103. Is set, the previous personal ID is automatically transmitted as if a magnetic card were read.

First, when the handset 101 is picked up, the card lamp 104 displays a wink to notify the user that continuous transmission is set.

Next, the user dials the local line transmission special number 2001. Then, the telephone 1 stores the initial signal 1 (transmitted last time) stored when the magnetic card is first read.
904 and the personal ID 1905, and the time (pause)
After the lapse of 2002, a local line transmission special number 1907 is transmitted to the line.

Next, a time (pause) 1908 until the private branch exchange supplements the office line is taken, and if the user has already dialed the other party's telephone number, the other party's telephone number 1909 is sent out to the line. Here, if the user does not dial, the time of the pause 1908 becomes longer. In this embodiment, the pause 2002 is 500 ms, and the pause 1908
Is at least 1 s.

As described above, the DTMF signal is transmitted.

Next, the operation of the system will be described with reference to FIGS. 1, 4 and 21 to 24.

3.1 Local Line Transmission FIG. 21 is a diagram showing a flowchart of a local line transmission operation.

First, when the user goes off-hook on the handset (2101), the hook switch unit 111 closes and the control device 109 detects the off-hook. Then, the control device 109 closes the switch circuit 130 and connects to the line terminal 14.
3 to the communication circuit 117 to close the DC loop, close the switch circuit 116, and switch the switch circuit 118 to the handset side to set the handset 10
From 1 the sound of the line terminal 143 can be transmitted and received, and the card lamp 104 is turned on (2102).

On the other hand, the private branch exchange detects a call when the DC loop is closed (2103), and sends a dial tone to the line (2104). The user
When the dial tone is received from the handset 101 and the card lamp 104 is lit, it is recognized that the magnetic card is ready to be read,
An operation for reading a magnetic card is performed (2105).

The telephone reads information stored in the magnetic card with the magnetic card reader 110, processes the information (card data) with the waveform shaping circuit 144, and reads the information with the control device 109. The control device 109 checks the read card data for horizontal and vertical parity, and if an error occurs, sends an error tone from the buzzer 119 (2106). As a result, the user recognizes that the card reading operation has failed (2108). If there is no error as a result of performing the horizontal and vertical parity checks on the card data, the personal ID included in the card data is transmitted. At this time, the card lamp 104 is turned on and off, a display indicating that the personal ID is being sent is displayed, the switch circuit 116 is turned off, and the switch circuit 118 is switched to the DTMF generation unit 123 to set the handset 101.
Is muted for transmission and reception, so that the user cannot hear the personal ID, and the voice of the user is not transmitted to the line terminal 143. Next, the data of the predetermined personal ID of the card data is extracted,
The DTMF data corresponding to the personal ID extracted from the DTMF generation unit 123 included in the control device 109 is transmitted. Then, the DTMF data is stored in the switch circuit 1
18, and is transmitted to the line terminal 143 via the communication circuit 117 and the switch circuit 130 (2107). Note that the DTMF data including the personal ID is initially provided with the reference numeral 1904 as described with reference to FIG. When the transmission of the DTMF data is completed, the control device 109 controls the switch circuits 116 and 118 to enable communication with the handset 101 and controls the card lamp 104 to light.

When the DTMF receiver 6 receives the DTMF data transmitted from the telephone, the private branch exchange checks the personal ID with the received DTMF data, and transmits a busy tone to the telephone if an error occurs (211).
0). Then, the user sets the busy tone on the handset 1
01, and recognizes that the magnetic card cannot be used (2112). If the result of checking the personal ID is normal, a second dial tone is transmitted to the telephone (2111). Then, the user listens to the second dial tone from the handset 101, recognizes that the line transmission is permitted, and dials the line transmission special number (2).
113).

[0110] When the telephone reads the local line transmission special number pressed by the dial button 106 by the control device 109, the telephone reads
By controlling the switch circuit 118, the transmission of the handset 101 is muted, the DTMF generating unit 123 is connected to the line, and the DTMF signal (hereinafter, referred to as the DTMF signal) corresponding to the local line transmission special number
(Referred to as a local line transmission special number signal) to the line terminal 143,
Thereafter, the switch circuit 118 is returned to the transmitter side (211).
4).

The transmission of the DTMF data including the personal ID (2107) to the transmission of the local line transmission special number signal (211)
Until 4), the private ID must be checked by the private branch exchange using DTMF data. Therefore, in the telephone control device 109, the private branch exchange pauses for the minimum time (for example, 0.5 seconds) necessary for checking the personal ID (2109). As a result, the private branch exchange can operate normally even if the user slides the magnetic card (2105) and immediately performs the dial operation (2113) of the station line special number.

The private branch exchange which has received the local line transmission special number signal controls the communication line switch 4, connects the telephone to the vacant central line trunk 5, and receives the dial tone of the switching network (2116).

The user listens to the dial tone of the switching network with the handset 101, recognizes that the other party's telephone number can be dialed into the office line, and performs a dialing operation (2117).

The telephone sends out the local line transmission special number signal (21
The same operation as in 14) is performed, and a DTMF signal (hereinafter, referred to as a partner telephone number signal) corresponding to the partner telephone number is transmitted to the line terminal 143 (2118).

Transmission of the station line transmission special number signal (211)
Between 4) and the transmission of the other party's telephone number signal (2118), the telephone must be connected to the central office (office trunk 5) by the private branch exchange. Therefore, the telephone control device 10
In 9, use the private branch exchange to set the telephone to the office line (office line trunk 5).
Is paused (2115) for the minimum time (eg, 1 second) required to connect to the. Thus, the private branch exchange can operate normally even if the user immediately dials (2117) the other party's telephone number immediately after dialing the local line transmission special number (2113).

Next, the private branch exchange that has received the other party's telephone number signal sends a dial to the central office, connects to the other party, and starts measuring the talk time (2119).

On the other hand, the user enters a state of talking with the other party on the line (2120, 1221).

Next, when the call ends and the user turns on the hook of the handset 101 (2122), the hook switch unit 111 of the telephone is turned off.
04 is turned off, the switch circuit 130 is turned off, and the DC loop closed at the line terminal 143 is opened (21).
23).

The private branch exchange detects the opening of the DC loop, recognizes that the call has ended, disconnects the line, terminates the measurement of the call time, and calculates the call charge based on the call time. The billing file of the holder corresponding to the personal ID is charged (2124).

According to the above operation, when the user performs the local line transmission operation, the magnetic card (personal ID) owned by the user is charged.

3.2 Continuous Transmission FIG. 22 is a flowchart of the continuous transmission operation.

First, the operation for setting the continuous transmission to the telephone will be described.

It is assumed that the user is talking (2201) according to the office line transmission procedure described with reference to FIG.
In this state, the user inserts the magnetic card 30 into the second position section 103 and goes on-hook (2202). The operation of inserting the magnetic card 30 into the second position section 103 is shown in FIG. 21, and the on-hook operation (212) after the sliding operation (2105) of the magnetic card 30
What is necessary is to carry out until 2).

Then, in the telephone 1, the card detection circuit 12
2 detects that the magnetic card 30 has been inserted, and notifies the control device 109. The control device 109 sets the state in the internal memory so as to enable continuous transmission, reads from the magnetic card 30, and holds the personal ID used for the current call. This sets continuous transmission.

Next, when the control device 109 detects that the hook switch unit 111 has been turned off, the control device 109 turns off the switch circuit 130 to open the DC loop of the line terminal 143. The current consumption state (hold state) is set (2203).

On the other hand, the private branch exchange performs a call termination and billing operation (2204) similar to the office line transmission procedure described in the previous section.

Next, the continuous transmission operation will be described. The user raises the handset and goes off-hook (220
5), the hook switch unit 111 of the telephone 1 is turned on, and the control device 109 starts operating. First, the switch circuit 130 is turned on and the communication circuit 11 is connected from the line terminal 143.
7 and a call current is passed. At this time, the internal memory is checked whether continuous transmission is possible. When recognizing that continuous transmission is possible, the card lamp 104 is controlled,
A wink display with a lighting time of 1 second and a dimming time of about 100 milliseconds indicates that continuous transmission is possible, and turns on the switch circuits 116 and 118 to connect the handset 108 to the line terminal 143 (220).
6).

On the other hand, the private branch exchange detects an outgoing call due to the closing of the DC loop of the telephone (2207), and sends a dial tone to the line (2208).

The user listens to the dial tone with the handset 101, and further recognizes that continuous transmission is possible by the wink display of the card lamp 104.
The local line transmission special number is dialed by the dial button 106 (2209).

The telephone 1 retrieves the stored personal ID from the internal memory when the control device 109 receives the dial data, and controls the switch circuits 116 and 118. Next, DTMF data corresponding to the personal ID obtained by adding a signal to the personal ID is added to the DTMF generating unit 12.
Send from 3 Then, the DTMF data is transmitted to the switch circuit 118, the communication circuit 117, and the switch circuit 1
The signal is sent to the line terminal 143 via 30. During the transmission of the personal ID, the card lamp 104 is blinked to indicate that the transmission is being performed (2210). After the transmission is completed, the switch circuits 116 and 118 are set to a steady state and returned to a state in which the handset 108 can talk, and the card lamp 1
04 is turned on.

When the DTMF receiving device 6 receives the DTMF data transmitted from the telephone, the private branch exchange checks the personal ID with the received DTMF data, and if normal, transmits a second dial tone to the telephone (2).
212). Then, the user listens to the second dial tone from the handset 101 and recognizes that the line transmission is permitted (2213).

On the other hand, after transmitting the DMFT data to the private branch exchange, the telephone set 1 pauses for the minimum time (for example, 0.5 seconds) required for the private branch exchange to check the personal ID (2211), By controlling the switch circuit 118, the DTMF generation unit 123 is connected to the line, and the handset 1
01 is muted, and the read local line transmission special number is transmitted to the private branch exchange as a local line transmission special number signal (221).
4). Thereafter, the switch circuit 118 is controlled to connect the transmitter to the line.

The private branch exchange that has received the office line transmission special number signal controls the communication line switch 4, connects the telephone to the empty office line trunk 5, and receives the dial tone of the exchange network (2216).

The user listens to the dial tone of the switching network with the handset 101, recognizes that the other party's telephone number can be dialed into the office line, and performs a dial operation (2217).

The control device 109 of the telephone 1 performs the same operation as the transmission of the local line transmission special number signal (2214), and the minimum necessary for connecting the telephone 1 to the central line (local line trunk 5) by the private branch exchange. After pausing for the time (for example, 1 second) (22
15) The DT corresponding to the other party telephone number is connected to the line terminal 143.
An MF signal (hereinafter, referred to as a partner telephone number signal) is transmitted (2218).

Next, the private branch exchange that has received the other party's telephone number signal sends a dial to the central office, connects to the other party, and starts measuring the talk time (2219).

On the other hand, the user is in a state of talking with the other party on the line (2220, 2221).

The subsequent operation is the same as the procedure described in the section 3.1, "Local Line Transmission," and the description is omitted.

By the above operation, when the user performs the continuous transmission operation, the operation of reading the magnetic card again can be omitted.

When the dial button 106 is operated (2209), the telephone 1 automatically sends out the personal ID, so that there is an advantage that the user does not have to be conscious of sending the personal ID during operation. .

However, if it is recognized that the data dialed by the dial operation is clearly not for calling (such as a hooking operation), the personal ID is not transmitted and the data dialed by the dial operation (such as hooking) It is configured to transmit only.

Further, if the magnetic card inserted into the second position section 103 is removed even for a moment after the continuous transmission is set, the continuous transmission is canceled and replaced with another magnetic card to prevent unauthorized continuous use.

Further, it is possible to cancel the continuous call not only during a call but also during a non-call.

3.3 Incoming Call Response in Continuous Calling FIG. 23 is a flowchart showing an incoming call response operation in the case where continuous calling is set.

First, the private branch exchange sends a calling signal (IR signal) to the telephone set 1 to notify the telephone set 1 of an incoming call (2301).

In the telephone 1, the IR signal from the line terminal 143
Upon receiving the signal, the ringer circuit 112 starts operating,
The incoming lamp 105 and the speaker 113 are made to blink and ring, respectively (2302). Further, the incoming call detection circuit 120 connected to the ringer circuit 112 detects the incoming call and activates the timer circuit 121. Then, the timer circuit 12
1 notifies the control device 109 of the incoming call. In addition,
The timer circuit 121 is a circuit that keeps outputting for 3 seconds even if the output from the incoming call detection circuit 120 is lost, so that an incoming call due to an intermittent IR signal can be detected.

The user recognizes that there is an incoming call by blinking the incoming call lamp 105 or sounding the speaker 113, picks up the handset 101 and responds (2303).

In the telephone 1, the control device 109 starts operating when the hook switch unit 111 is turned on, detects that there is an output of the timer circuit 121, and recognizes that it is a response to an incoming call.

Next, the switch circuit 130 is turned on, and a DC current from the line terminal 143 flows to the communication circuit 117 to close a DC loop. In addition, the switch circuit 116 is turned on, the switch circuit 118 is controlled to connect the transmitter to the line, and the telephone call with the handset 101 is enabled. It turns on without performing (2304).

On the other hand, the private branch exchange detects the closing of the DC loop of the telephone 1, recognizes that the incoming call has been answered, and connects with the other party (2305). Then, a call state is set (2306, 2306).
307).

Next, when the user performs a dial operation to receive a hold, transfer, or other service of the private branch exchange in a call state (2308), in the telephone 1, the control device 109 dials the dial button 106 from the dial button 106. Since the terminal is currently reading and answering the incoming call, it does not send out the personal ID, but uses only the dial as a DTMF signal on line terminal 1.
43 (2309).

The private branch exchange receives the DTMF signal and performs service processing corresponding to the DTMF signal (231).
0), and put into a call state (2311, 2312).

When the user ends the call, the handset 10
1 is returned (2313). Then, the telephone 1 turns off the switch circuits 116 and 130 and sets the switch circuit 1
18 is controlled to a steady state, and the operation of the control device 109 is stopped (2314).

Then, the private branch exchange detects opening of the DC loop of telephone set 1 and performs a call termination process (2315).

As described above, when the DTMF signal corresponding to the dialing operation is transmitted to the private branch exchange even when the incoming call is answered, the private ID is not transmitted, and the private branch exchange operates normally. It is configured to be able to.

3.4 Extension Transmission in the Case of Continuous Transmission FIG. 24 is a flowchart showing an extension transmission operation in the case where continuous transmission is set.

The off-hook operation (2401), the closing of the DC loop, and the wink display operation of the card lamp (24)
02), the call detection operation (2403) and the dial tone transmission operation (2404) are the same as the operations described in steps 2205 to 2208 of FIG.

When the user hears the dial tone,
Dial the desired extension number (2405). Then
In the telephone 1, the personal ID stored in the
MF signal is sent to the line, during which the card lamp 10
4 flashes to mute the transmission / reception of the handset 101 (2406).

On the other hand, the private branch exchange checks the personal ID in the same manner, and sends out the second dial tone to the line if there is no abnormality (2408). Then, the user recognizes the reception of the ID (2409).

In the telephone 1, the private branch exchange takes a minimum pause of 0.5 seconds to check the personal ID (2).
407), a DTMF signal corresponding to the extension dialed in step 2405 (hereinafter referred to as an extension number signal)
Is sent to the line terminal 143 (2410).

Upon receiving the extension number signal, the private branch exchange analyzes the contents. As a result, when it is recognized that the call is an extension, the personal ID is ignored and the call is connected to the extension of the other party (2411). Then, a call state is established (2412, 2
413).

Thereafter, a cutting process is performed.
Steps 2313 to 2315 of FIG.

As described above, when the extension transmission operation is performed in the state of continuous transmission, the ID signal received by the private branch exchange can be ignored and the extension can be connected to each other.

[0164]

As described above, according to the present invention, it is possible to provide a telephone exchange service using a card with a simple structure without any modification on the telephone exchange side.

[Brief description of the drawings]

FIG. 1 is a system configuration diagram of the present invention.

FIG. 2 is an external view of a telephone with a magnetic card reader.

FIG. 3 is an external view of a magnetic card.

FIG. 4 is a functional block diagram of a telephone with a magnetic card reader.

FIG. 5 is a circuit block diagram of a telephone with a magnetic card reader.

6 is a diagram showing an arrangement of a circuit diagram of the telephone with a magnetic card reader shown in FIGS. 7 to 14. FIG.

FIG. 7 is a circuit diagram of a telephone with a magnetic card reader (part 1).
It is.

FIG. 8 is a circuit diagram of a telephone with a magnetic card reader (part 2).
It is.

FIG. 9 is a circuit diagram of a telephone with a magnetic card reader (part 3).
It is.

FIG. 10 is a circuit diagram (part 4) of a telephone with a magnetic card reader.

FIG. 11 is a circuit diagram (part 5) of the telephone with a magnetic card reader.

FIG. 12 is a circuit diagram (part 6) of the telephone with a magnetic card reader.

FIG. 13 is a circuit diagram (part 7) of a telephone with a magnetic card reader.

FIG. 14 is a circuit diagram (part 8) of a telephone with a magnetic card reader.

FIG. 15 is a diagram showing a waveform shaping circuit of a telephone with a magnetic card reader.

FIG. 16 is a timing chart illustrating the operation of the waveform shaping circuit.

FIG. 17 is a diagram showing a data format of a magnetic card.

FIG. 18 is a diagram showing the correspondence between card data and DTMF signals.

FIG. 19 is a diagram illustrating transmission timing of a DTMF signal.

FIG. 20 is a diagram showing the transmission timing of a DTMF signal during continuous transmission.

FIG. 21 is a diagram showing a flowchart of an office line transmission operation.

FIG. 22 is a diagram showing a flowchart of a continuous transmission operation.

FIG. 23 is a flowchart showing an incoming call response operation when continuous transmission is set.

FIG. 24 is a diagram showing a flowchart showing an extension transmission operation when the continuous transmission is set.

FIG. 25 is a diagram (part 1) illustrating a function of a terminal provided in the control device.

FIG. 26 is a diagram (part 2) illustrating functions of terminals provided in the control device;

[Explanation of symbols]

1. Phone with card reader, 2. 2-wire cable, 3.
... Line circuit, 4 ... Speaker switch, 5 ... Office trunk, 6 ... DTMF receiving device, 7 ... Central control device, 8 ... Storage device, 9 ... Charging device, 10 ... Bus, 11 ... Public network, 1
01: Handset, 102: Magnetic card reader unit, 1
03: second position section, 104: card lamp,
105: incoming lamp, 106: dial button, 107
... Hooking button, 108 ... Reception volume button, 109
Control device.

──────────────────────────────────────────────────の Continuation of the front page (51) Int.Cl. ⁷ identification code FI H04M 19/00 H04M 19/00 (58) Investigation field (Int.Cl. ⁷ , DB name) G06K 17/00 H04M 1/00 -1/62 H04M 1/66-1/82 H04M 3/02-3/06 H04M 3/42 H04M 3/424-3/436 H04M 11/00-11/10 H04M 15/00-17/02 H04M 19 / 00-19/08 H04Q 3/58

Claims (5)

(57) [Claims] 1. A portable storage medium for storing predetermined information ,
A terminal device and the terminal device are connected via a communication line,
A communication current is supplied to the terminal device, and
Having a means for calling a central office line based on the connection information
In a telephone switching system that includes a conversion device, to the terminal device, connected to the communication line, the rectifier for rectifying the speech current
Rectifying means having a positive terminal and a negative terminal
When controls and the handset, the call means for connecting the said handset and said communication line, reading means for reading the predetermined information from the portable storage medium, during a call, and the call means and said reading means ,
The predetermined information read by the calling means is transmitted to the exchange device.
Control means for transmitting , and said communication means with respect to said positive terminal and said negative terminal.
Power supply means connected in series with
Supply to the control means and the reading means by flow.
And a power supply means for generating power . 2. The apparatus according to claim 1, wherein said control means and said reading means are provided between said control means and said reading means.
The pulse width output by the reading means is extended, and
A waveform shaping means for outputting to the control means.
The telephone exchange system according to claim 1. 3. The control means according to claim 1 , wherein
Converts the read predetermined information into a DTMF signal,
DTMF signal transmitting means for transmitting the
2. The telephone exchange system according to claim 1, wherein 4. The terminal device further comprises the DTMF signal.
When the signal transmitting means transmits the DTMF signal,
Switch means to disconnect the handset from the communication line.
4. The telephone exchange system according to claim 3, further comprising: 5. The switching device further includes the DTMF signal.
Signal receiving means for receiving a signal,
When recognizing the calling operation, the terminal device and the DTMF
Means for connecting to signal receiving means.
4. The telephone exchange system according to claim 3, wherein: