JPH06311264A - Public telephone system - Google Patents

Abstract

PURPOSE:To secure the time when telephone set can use for the original speaking purpose by reducing the transmission or collation time of an invalid card number. CONSTITUTION:Upper limit and lower limit numbers are designated among the numbers of plural invalid cards and prepared as one list number, and the prepared list number is transmitted to the telephone set. Then, this list number is returned from the telephone set and confirmed at a center equipment 30 corresponding to inquiry from the center equipment 30. As a result, the time required for transmitting or collating the invalid card number can be reduced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a public telephone system which comprises a public telephone (hereinafter referred to as a telephone) capable of making a telephone call using a card and a center device, and prevents telephone calls caused by the use of an illegally rewritten invalidation card. .

[0002]

2. Description of the Related Art In a telephone for making a call using a card such as a telephone card, in order to prevent a call by an invalidly rewritten so-called revocation card, the following revocation card management is conventionally performed. ing. That is, the number of all the revocation cards of all the telephones expected to be used is registered in the memory on the side of the center device for each telephone,
Because each phone cannot register all revoked card numbers due to memory capacity, the revoked card numbers expected to be used in each phone are sent from the center device to each phone and registered in the memory of each phone. . And
When a card is inserted into the telephone for making a call, the telephone reads this card number and compares it with the revoked card number registered in the memory, and if both numbers match, the call is prohibited.

[0003]

In the conventional public telephone system described above, when the revoked card number is set for each telephone, the revoked card number expected to be used by each telephone is transmitted for each telephone. When checking the revocation number set on each phone, the revocation card number is returned from each phone one by one, so the transmission time of the revocation card number on the center device and the telephone and the revocation card number on the center device There is a problem that the matching time increases and during that time the telephone cannot be used for the purpose of the original call.

Therefore, it is an object of the present invention to reduce the transmission time and verification time of a revoked card number, and to secure the time when the telephone can be used for the original call purpose.

[0005]

In order to solve such a problem, the present invention creates a list number by designating an upper limit number and a lower limit number among a plurality of revoked card numbers to create one list number. The center device is provided with means and list number transmitting means for transmitting the list number to the public telephone, and the telephone is provided with list number returning means for returning the list number in response to an inquiry from the center device.

[0006]

The upper and lower limit numbers of a plurality of revoked card numbers are designated and created as one list number, and the created list number is transmitted to the telephone. Then, this list number is returned from the telephone in response to the inquiry from the center device and is confirmed in the center device. As a result, it is possible to reduce the time spent for transmitting and collating the revoked card number.

[0007]

1 is a diagram showing an embodiment of a public telephone system according to the present invention, and is a block diagram of a telephone 10 constituting this system. In the figure, 11 is an incoming call detection circuit that detects an incoming call coming to a telephone line (hereinafter referred to as line) L, 12 is a ringer circuit that rings an incoming call signal by an incoming call signal, and 13 is a reversal of the line L due to a response from the other party. Inversion detection circuit, 14 is a billing signal detection circuit for detecting a billing signal, and 15 is D for receiving a DTMF signal coming to the line L.
A TMF receiving circuit, 16 is a deadline / DP sending circuit that forcibly disconnects the loop of the line L and outputs a dial pulse (DP) signal to the line L, and 17 is a communication circuit. Further, 18 is a DTMF sending circuit that sends a DTMF signal to the line L, 19 is a reminder sound sending circuit that outputs a reminder sound when the call charge is exhausted, and 20 performs various kinds of processing on the inserted telephone card or the like. A card unit section, 21 is a display section, 22 is a keyboard such as a dial key, 23 is a relay drive circuit, 24 is a power supply section for supplying power to each section of the telephone, 25 is a memory (not shown) and controls the above sections. It is a control unit that does. HS1 and HS2 are hook switches, and gs is a relay.

Here, the telephone set 10 responds to an incoming call from a center device, which will be described later, and at the same time,
The revoked card list number, which will be described later, which is a list of cards that have been illegally rewritten and transmitted from the center device is received and stored. When the card is inserted into the card unit section 20, the card number is detected and collated with the revoked card list number. If the card is determined to be a revoked card, the call is blocked.

FIG. 2 is a block diagram of the center device 30 which constitutes the public telephone system. In the figure, 32 is a line control unit that controls outgoing and incoming calls to the line group 31, 33 is a display unit, 34 is an input unit such as a keyboard, 35 is a printer unit that performs print output, 36 is a storage unit, and 37 is It is a control unit that controls each of the above units.

The center device 30 creates a revoked card list in order to prevent the above-mentioned revoked card from making illegal calls to the telephone set 10, and manages this revoked card list for each telephone set. Create a management table below. Then, the revoked card list is transmitted to each telephone according to the created management table.

Next, FIGS. 5 (a) and 5 (b) are explanatory views showing an outline of the revocation card list and the management table created in the center device 30. FIG. As shown in FIG. 5A, the revoked card list numbers on the revoked card list (revocation card list NO) 1, 2, 3, ...
When setting, the card number, that is, the upper limit value and the lower limit value of a certain plurality of consecutive revoked card numbers are set in the storage unit 36 as one list number. Further, when setting the contents of the management table, as shown in FIG. 5B, the management number and the telephone number of this telephone are set according to the number (series NO) 1, 2, 3, ... Of each telephone. And the revoked card list number is set in the storage unit 36.

Next, FIG. 3 is a flow chart showing the operation of the center device 30 for managing revoked cards. Based on this flowchart, the control unit 3 of the center device 30
The operation of No. 7 will be described in detail. When the center device 30 is powered on and the control unit 37 is activated, the control unit 37 determines whether the “communication mode?” In step 100 or the “setting mode?” In step 101. Then, when the setting operation of the revoked card is performed in the input unit 34 and the “setting mode?” In step 101 and the “revocation card list creation?” In step 102 become “Y”, the input unit 34 is subsequently operated. The designated revoked card list number is input in step 103. Thereafter, in step 104, it is determined whether the card number corresponding to the designated revoked card list number is set or whether the card is printed out by inputting the operation information of the input unit 34.

If it is determined that the revoked card list is set, the upper and lower limits of the series numbers of the cards already issued and recognized as revoked are input in step 105, and the designated revoked card is used. A list as shown in FIG. 5A is created together with the card list number, stored in the storage unit 36, and the process proceeds to step 107. When setting one revoked card, a card number having the same upper and lower limits is designated. In this way, a plurality of revoked card numbers are set as one revoked card list number, so the storage capacity of the storage unit 36 can be reduced.

If it is determined from the operation information of the input unit 34 that the designated revoked card list number is printed out, the designated revoked card list number and the card number corresponding to this number are stored in the storage unit 36 in step 106. The reading is performed, the printer unit 35 is driven to print out, and the process proceeds to step 107. In step 107, it is judged whether the revoked card number has been set or the printout thereof has ended.
Next, the revoked card list number designated is input, and the card number corresponding to this list number is set or printed out.

When the setting of the revoked card list number is completed in this manner, next, a management table for managing the revoked card list for each telephone is created. That is, when a predetermined operation is performed in the input unit 34 and the determination "creation card list management table creation?" In step 108 is "Y", the telephone series number designated by the operation of the input unit 34 is subsequently used. A management table number is input in step 110. Thereafter, in step 111, the operation information of the input unit 34 is input to determine whether to set the contents in the designated management table or print out the contents of the management table.

When it is determined that the management table is set, the telephone management number, the telephone number of the telephone and the revoked card list number used for this telephone are designated in correspondence with the designated management table number. At the same time, it is created in a management table as shown in FIG. 5B, stored in the storage unit 36, and the process proceeds to step 114. By creating the management table in which the revoked card list number is set for each telephone as described above, the memory of the center device can be saved and the revoked card number set for each telephone can be easily registered. Further, as will be described later, when confirming the contents of the revocation card set in each telephone, the contents can be easily confirmed based on the management table.

Further, it is judged from the operation information of the input section 34 that the contents of the management table are printed out, and step 11
When it is determined to be "N" in 1, the designated management table number and the management number, telephone number, and revoked card list number corresponding to this number are read from the storage unit 36 in step 113 to drive the printer unit 35. The printout is performed, and the process proceeds to step 114. In step 114, it is judged whether the management table has been set or the printout has ended, and if these operations are to be continued, the process returns to step 110, the management table number specified next is input, and the telephone number corresponding to this table number, Set or print out the revoked card list number.

Thus, when the creation of the revoked card list and the management table is completed and the predetermined operation of the input unit 34 is performed to transmit the information to each telephone, the "communication mode?" Y ”is determined.
In this case, if there is a revocation card list to be transmitted to each telephone and it is determined that “Revocation card list certification?” In Step 120 is “Y”, the revocation card list number to be transmitted to each telephone is determined in Step 121. In addition to the designation, the telephone number for which the list number is set in step 122 is designated based on the management table created, and then in step 12
In step 3, the remote setting for transmitting and setting the revoked card list to each designated telephone is started. Further, at the time of this remote setting, all the revoked card numbers shown in this revoked card list are temporarily transmitted to the telephone and set.

When all the revoked card numbers shown in the revoked card list are transmitted to the corresponding telephones at once, and thus the revoked card numbers held by the respective telephones are periodically inquired to the respective telephones. In addition, each telephone side does not have to return all the revoked cards, but only the revoked card list number need be returned. Therefore, the transmission time on the telephone side can be significantly reduced, and the collation time on the center device 20 side can be shortened. On the other hand, the revoked card list can be searched from the revoked card list number registered in the management table of the corresponding telephone, and the revoked card number on the retrieved revoked card list can be easily confirmed.

FIG. 4A is a flow chart showing the details of the remote setting operation of the revocation card list for each telephone. That is, the control unit 37 controls the line control unit 32,
In step 200, any line of the line group 31 is captured to form a DC loop thereof, and in step 201, the telephone number of the telephone corresponding to the designated revocation card list of the management table is transmitted to the captured line and sent to the telephone. Is transmitted, and at this time, a timer for a predetermined time is started. In this case, when the other party's telephone answers and it is determined to be "Y" in step 202, the designated revoked card list is transmitted from the line controller 32 as a DTMF signal to the answering telephone in step 204. Then, in step 205, it is determined that the transmission is normally completed. When the transmission is normally completed, in step 206, the list number of transmission completion is registered in the revoked card list, and in step 207, the DC loop is opened, and then step 20
In step 8, the printer 35 is driven to print out the fact that the revocation card list transmission is normally completed. When transmission of the revoked card list to a certain telephone is completed in this way, the next telephone is designated and the corresponding revoked card list is transmitted.

After the call is made to the telephone, if the telephone does not respond and the time-out of the timer in step 203 becomes "Y", or the transmission of the revoked card list does not end normally, the determination in step 205 is " In the case of "N", after the DC loop is opened in step 209, the printer 35 is driven in step 210 to print out the fact that the transmission has failed.

Next, FIG. 4B is a flowchart showing the operation of the control unit 25 in the telephone 10 which receives the revoked card list transmitted from the center device 30. That is, when an incoming call arrives from the center device 30, in step 250 the relay gs is driven to capture the line L and form a DC loop. After that, the DTMF signal indicating the revoked card list transmitted from the center device 30 is transmitted in step 25.
1 to receive via the DTMF receiving circuit 14. Then, the received revocation card list is sent to the control unit 25 in step 252.
In step 2 while accumulating in a memory (not shown)
At 53, the relay gs is opened to open the DC loop of the line L. Thereafter, when a card is inserted into this telephone, the control unit 25 reads the number of this card and compares it with the number of the revoked card stored in the memory to determine whether or not the call can be made.

[0023]

As described above, according to the present invention, the upper limit and the lower limit of the numbers of a plurality of revoked cards are designated and created as one list number, and the created list number is sent to the telephone. Since the telephone number is sent back and the telephone returns this list number when there is an inquiry from the center device, the time spent for sending and checking the revoked card number can be greatly reduced, and it can be used for the original calling purpose of the telephone. You can secure enough time.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of a public telephone that constitutes a public telephone system according to the present invention.

FIG. 2 is a block diagram of a center device that constitutes the public telephone system.

FIG. 3 is a flowchart showing an operation of the center device.

FIG. 4 is a flowchart showing a calling operation of the center device and a receiving operation of the public telephone.

FIG. 5 is an explanatory diagram of a revocation card list number and a management table created by the center device.

[Explanation of symbols]

 10 Public Telephones 11 Incoming Call Detection Circuit 15 DTMF Reception Circuit 20 Card Unit Section 23 Relay Drive Circuit 25, 37 Control Section 30 Center Device 31 Line Group 32 Line Control Section 34 Input Section 35 Printer Section 36 Storage Section L Line gs Relay

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Juno Suzuki 2-3-2 Shimomeguro, Meguro-ku, Tokyo Inside Tamura Electric Co., Ltd. (72) Inventor Shigekazu Sakata 2-3-3 Nishishinjuku, Shinjuku-ku, Tokyo No.2 International Telegraph and Telephone Corporation (72) Inventor Hideyuki Oikawa 2-3-2 Nishishinjuku, Shinjuku-ku, Tokyo Within International Telegraph and Telephone Corporation

Claims (1)

[Claims] 1. A public telephone capable of making a telephone call with a card, and a center device for registering the numbers of all illegally revoked revocation cards in a memory for each public telephone. The center device is a public telephone. In the public telephone system that transmits the revoked card numbers related to the public telephones to each other and blocks calls based on the use of the revoked cards, one list specifying the upper and lower limits of the plurality of the revoked card numbers A list number creation means for creating a number and a list number sending means for sending the list number to the public telephone are provided in the center device, and the list number is returned for returning the list number in response to an inquiry from the center device. A public telephone system comprising means for providing the public telephone.