JPH0125263B2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a method for sequentially updating and setting numerical data for control in a public telephone equipped with a processor and performing various controls using a stored program method. be.

[Prior art]

Such public telephones (hereinafter referred to as telephones) use information such as unit talk time, unit call charges, prohibited numbers, toll-free numbers, and telephone management numbers as control data.
These are generally set using a dip switch.

However, if the number of these data increases, the space for accommodating them increases as the number of required deep switches increases, and there is a drawback that erroneous settings are likely to occur when updating the settings.

In addition, if numerical data related to call charges, such as unit talk time and unit call charge, is changed illegally, there will be a discrepancy between the actual call charge and the amount charged in the telephone, and this difference will be reflected in the charge of the telephone. There is a risk that it will be stolen by those involved in the installation.

As a countermeasure for this, EPROM (Electrically
It has been proposed that each data be stored in a Programmable Read Only Memory (Programmable Read Only Memory) and then installed using a socket, etc., and replaced with a spare EPROM as the data is updated, and that this process be repeated each time the data is updated. ing.

However, when using this method, it is necessary to prepare separate EPROMs for current use and backup use, which increases the cost, and when attaching and removing the EPROM to a socket etc., the pins of the EPROM may be bent, resulting in damage or poor contact. In addition to this, it also brings about drawbacks such as the need for time and effort to update data.

[Summary of the invention]

The present invention has been made in view of such drawbacks of the conventional technology, and has the purpose of easily and quickly setting numerical data, and includes an EPROM in which all bits show the original logical value when data is erased, and A data area is provided to store control numerical data consisting of multiple bits, and a numerical value is assigned to each of these bits from a certain direction, and each bit is assigned a certain direction according to the numerical data. The present invention provides an extremely effective method for setting numerical data for public telephones, in which the original logical value is updated to the recorded logical value sequentially from the corresponding bit to the corresponding bit.

〔Example〕

Hereinafter, details of the present invention will be explained with reference to figures showing examples.

Figure 1 is a block diagram of the entire configuration, and an incoming call detection circuit 3 is always connected to the line terminal 1 to which the line from the telephone office is connected via the contact gs ¹ of the relay GS provided in the main unit 2. When it detects the arrival of a calling signal, it drives the buzzer 4 and also sends the incoming call information to a processor such as a microprocessor (hereinafter referred to as
CPU) 7 to start it.

When the off-hook switch 8 generates off-hook information, the start circuit 9 responds and drives the relay GS, and sends the start information to the CPU via the input/output circuit 5b and the bus 6.
7, the CPU 7 starts corresponding control, while the contact gs ¹ operates and connects the communication circuit 13 to the line terminal 1 via the billing signal receiving circuit 10, diode bridge 11, and power supply circuit 12. Then, a direct current loop is closed to the line, and communication using the handset 14 is enabled.

In addition, the power supply circuit 12 generates a local power supply E ₂ based on the line current whose polarity has become constant by the diode bridge 11 in accordance with the flow of the line current accompanying the closure of the DC loop, and turns on. Although it is supplied to each part via contact gs ² , contact gs ¹ is also used during on-hook.
A current to the extent that the exchange does not respond is passed from the break side of the switch, and this sends out the local power supply E ₂ to circuits that require power supply even during on-hook and circuits that operate simultaneously with off- _hook.
We are supplying

On the other hand, CPU 7 is connected via bus 6.
Execute the program in EPROM15 and do the same
Control is performed while accessing the necessary data to RAM (Random Access Memory) 16, but control data stored in EPROM 15 is used as necessary. ing.

That is, in the case of a call, the signal generator 18 sends out a dialing signal using a composite audio frequency in response to the operation of the keyboard 17, the display circuit 19 displays the call charge, and charges are made in accordance with the charging signal received from the exchange. The storage of coins by the sub unit 20 and the coin storage mechanism (hereinafter referred to as storage mechanism) 21 is sequentially controlled according to the billing information given from the signal circuit 10, but when the dial signal is sent out, free dialing is performed according to the data in the EPROM 15. If the switching equipment transmits a billing signal only when the called party answers the call, the system allows the calling of prohibited numbers, and if the switching equipment sends out a billing signal only when the called party answers, then
According to the numerical data in the EPROM 15, coins corresponding to the unit call charge are stored every time the unit call time elapses, and when the input and waiting hardening disappears, the call is forcibly disconnected.

On the other hand, in the case of an incoming call, switch 8
According to the off-hook information from the incoming call detection circuit 3, the relay GS is driven to close the DC loop and allow the call, but the CPU 7 determines that the call is incoming based on the incoming call information from the incoming call detection circuit 3, and Each control is not performed.

Further, the sub-unit 20 is connected to a sensor provided in the storage mechanism 21 for detecting the material, shape, etc. of the inserted coin, and a measurement circuit 23 for determining the measured value of the coin.
And an EPROM 24 that stores the upper and lower limit values of the measured values obtained from this as numerical data.
The measurement circuit 23 is connected to the input/output circuit 25, and the EPROM 28 is directly connected to the bus 6, so that the measured value from the measurement circuit 23 and the EPROM 2
4, the CPU 7 determines whether the inserted coin is correct or not, and also controls the storage mechanism 21 via the input/output circuit 25 to return irregular coins, accumulate and store regular coins, etc. It has become a thing.

Note that a part of the program is also stored in the EPROM 24, and is used together with the blocks in the EPROM 15 to regulate the control operation of the CPU 7.

FIG. 2 is a diagram showing an example of the contents of the EPROM 15. All addresses are divided into a program area 31 for storing programs and a data area 32 for storing control data. Call time Dti, unit call charge Dta,
Free calling number Dnn, phone management number Dnm
etc. are stored.

Note that data in EPROM is generally erased by irradiation with ultraviolet light, etc., and when data is erased, all bits become the original logic value, and only the bits that have been written using electrical signals return to the original logic value. It turns into a recorded logical value of reflection,
In this example, the original logical value is “1” and the recorded logical value is “0”
It has become something that will become a reality.

3 and 4 are diagrams showing first and second specific examples of update status of unit call charge Dta, and in FIG. 3, storage of numerical data Dta indicating unit call charge is shown. address is bit
It consists of 1 byte from _b7 to _b0 , and the direction is from the lower bit _b0 to the upper bit _b7 in a fixed order direction.
A numerical value of 11 yen to 18 yen is assigned to each bit b ₀ to b ₇ , and as the numerical data indicated by this is updated, the bits are sequentially assigned from the lower bit b ₀ to the upper bit b ₇ . Each bit _b0 to _b7 is set from “1” to “0”
is being updated to.

In other words, in (A), the numerical data shows 10 yen because all bits are “1”, and in (B), only bit b ₀ is “0”.
shows 11 yen, (C) shows 12 yen due to “0” in bits b ₀ and b ₁ , and (D) shows 18 yen because all bits are “0”. ing.

Figure 4 shows the display of numerical data Dta using bit b ₁₅ .
2 bytes ~b ₀ are used, and it is basically the same as in Figure 3, but (A) is 18 yen, (B) is 19 yen, and (C) is
20 yen, (D) indicates 26 yen.

Therefore, the CPU 7 can determine the value of the numerical data Dta by finding the number of "1"s from the lower bit _b0 from the address where the numerical data Dta is stored.

Note that the above numerical data update method is EPROM
It can be applied not only to the unit call charge Dta and unit call time Dti in 15, but also to each numerical data in EPROM24.

FIG. 5 is a block diagram of a writer used by connecting to the connector 26 in FIG. 1 when storing data in the EPROMs 15 and 24.
41, ROM42, RAM43, input circuit 44,
A RAM 45 and an output circuit 46 are connected by a bus 47, and a keyboard 48 is connected via an input circuit 44.
A display device 49 is connected to the display device 49 through a connector 6, and a bus bar 47 and an output circuit 46 are connected to a connector 50 that fits with the connector 26 shown in FIG.

Here, a program for writing processing is stored in the ROM 42, and after fitting the connector 50 with the connector 26 shown in FIG.
8, the CPU 41 will change the ROM accordingly.
It executes the program in 42, performs processing operations while accessing the required data to RAM 43, temporarily stores the data in buffer RAM 45, transfers it to connector 50, and sends a write command from output circuit 46. Then, data is written to the designated EPROM 15 or 24.

Further, the display 49 includes a character display or the like, and is used to display stored data, the address where the data is stored, and the like.

Note that a socket is provided in parallel with the connector 50,
Alternatively, by replacing the connector 50 with a socket, data can be stored in any EPROM.

However, if you store the write processing program in the EPROM 15 or 24 shown in Fig. 1, you can use the keyboard 1 shown in Fig. 1 without using the one shown in Fig. 6.
7. Similar operations can be performed using the display 19 and CPU 7.

In addition, in FIG. 1, the connector 26 is not particularly provided, and the main unit 2 and the sub unit 20 are connected by a connector, which is removed and the unit 50 shown in FIG. 5 is fitted. It may also be something to do.

Therefore, the numerical data is read from the EPROM 15 or 23 and displayed on the display 19 or 49, and after checking the status, each bit is sequentially set from the lower bit _b0 according to the numerical data to be stored. 0” on the keyboard 17
or 48, and then write these data to a predetermined address in the EPROM 15 or 23, the numerical data can be set or updated easily and quickly.

FIG. 6 is a flowchart illustrating how the CPU 7 determines the unit call charge, in which the CPU 7 performs the process 101 to “calculate the number of 0 bits from the storage area of Dta” and calculates the amount of 10 yen + 0. Number of bits =
After TA/calculation 102 is performed, TA is stored in RAM 103, and this is used as a subsequent unit call charge for control.

However, the configuration in Figure 1 can be arbitrarily selected according to the situation, and in Figures 3 and 4, the number of bits and assigned numerical values may be determined according to the conditions, and in Figure 6, Various modifications can be made, such as determining the contents of step 102 depending on the type of numerical data.

〔Effect of the invention〕

As is clear from the above explanation, according to the present invention, the operation is easy and quick when setting or updating numerical data for controlling a telephone, and when erasing data, all bits of the EPROM show original logic values.
A remarkable effect can be obtained in a telephone equipped with

[Brief explanation of drawings]

The figures show an embodiment of the present invention, in which Figure 1 is a block diagram of a telephone, Figure 2 is a diagram showing the contents of EPROM,
FIGS. 3 and 4 are diagrams showing the storage status of numerical data, FIG. 5 is a block diagram of a writer writing to EPROM, and FIG. 6 is a flowchart showing the unit call charge determination process. 1...Line terminal, 3...Incoming call detection circuit, 6...
Bus line, 7...CPU (processor), 8...Hook switch, 10...Charging signal receiving circuit, 13...
Telephone circuit, 14... Transmitter, 15, 24...
EPROM, 16...RAM, 17...Keyboard,
31...Program area, 32...Data area.

Claims (1)

[Claims] 1 All bits show original logic value when erasing data
In a public telephone equipped with an EPROM and controlled based on control numerical data stored in advance in the EPROM, a data area consisting of a plurality of bits for storing the control numerical data is provided in the EPROM, and each bit is A numerical value is assigned to each bit from a fixed digit direction, and the original logical value is updated to a recorded logical value for each bit sequentially from the fixed digit direction according to the numerical data. A method for setting numerical data for public telephones.