JP2637895B2 - Telephone - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a telephone for automatically transmitting a selection signal (such as a dial signal) based on a key input.

[0002]

2. Description of the Related Art Conventionally, a telephone uses a selection signal transmitting device for transmitting a selection signal indicating a destination telephone number or other data in response to a dial operation of a keyboard. The selection signal transmitting device is configured to write key input data from a keyboard into a storage means, sequentially read out the stored contents, and transmit the selection signal to a telephone line.

In a telephone which realizes such selection signal transmission, A.P. B. using a memory that inhibits writing of input data when the input data reaches the maximum storage capacity; There is a type in which stored data is sequentially circulated according to input data and a cyclic memory having an appropriate storage capacity is used.

[0004]

By the way, in such a telephone, in the case of the telephone A, when the storage means is constituted by a 16-digit memory, as shown in FIG. The key input is prohibited when all the digits are filled in the memory, and it is impossible to transmit a dial signal of more than the stored digit (n) of the memory.

In the case of B, when the storage means is constituted by a 16-digit circulating memory, a dial signal output and a memory content are provided in response to a key input as shown in FIG. When such a memory is used, when the next key input is performed faster than the speed at which the dial signal is transmitted, the contents of the memory being transmitted (during reading) are destroyed. A dial signal will be transmitted. For example, before sending the second digit dial signal “7”,
When the 18th digit “1” is inputted by key, the dial signal of the second digit is not the original “7”, but the “1” inputted immediately before is erroneously transmitted.

When such erroneous output of data or destruction of memory contents occurs, a service using a telephone, for example,
It has been difficult to transmit a multi-digit dial signal in various services such as a seat reservation service of a transportation facility such as a railroad or an aircraft, correspondence with a financial institution, or computer access.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a telephone which realizes automatic transmission of a multi-digit dial signal while preventing destruction or erroneous output of storage contents of storage means for storing selection signal data. .

[0008]

A telephone according to the present invention includes a plurality of keys as shown in FIGS.
A keyboard (2) for inputting data by operating a selected key, and receiving key input data from the keyboard.
Output the key input data together with the strobe signal.
Logic control means (CPU 30)
The key input data received together with the strobe signal from
Storage means (memory 8) by dividing the data by predetermined digits and sequentially
When the amount of data stored in the storage means exceeds a certain amount, an input inhibition display output is generated together with an input inhibition output for inhibiting the writing of the key input data to the storage means, and the data is written to the storage means. When the reading of all the key input data is completed, the input prohibition output and the input prohibition display output are released, and the writing of the key input data to the storage means is restarted.
Wherein the selection signal sending unit along with storage of the key input data from the keyboard performs transmission of the dial signal based on the key input data (4), the selection signal sending Yoo
Based on the input prohibition display output output by the knit
Display means (display device 18) for performing a display indicating waiting for input from a keyboard .

[0009]

In the telephone according to the present invention, the stored data of the key input data stored in the storage means is detected, the input of the key input data is controlled in accordance with the detected data amount, and the stored data amount is reduced to a fixed amount. Indicate that you have reached
That is, when the data amount stored in the storage means reaches a certain amount, the selection signal sending unit issues a key input standby instruction for the key input data to the data input means, and issues a data read end signal of the storage means. Therefore, the display device receives the standby command and the end signal from the selection signal transmission unit, performs display indicating standby for key input, and cancels the display upon completion of reading.
The dial operation can be performed while checking the display, and the operability is improved.

[0010]

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

FIG. 1 shows an embodiment of a telephone according to the present invention. The telephone includes a keyboard 2 as input means for selecting signal data, and a selecting signal transmitting unit 4 for transmitting a selecting signal based on an input from the keyboard 2.

The keyboard 2 has a numeric keypad and *
A plurality of keys including a key and a # key are provided. In this embodiment, the keyboard 2 has a total of 12 keys arranged in 3 rows and 4 columns. In the keyboard 2, numeric keys, * keys, and # keys are used for inputting numerical values such as a telephone number of the other party and a personal identification number.
Each key consists of position information COL1,2,3 on the horizontal axis and position information ROW1,2,3,4 on the vertical axis.

The key input data obtained by operating each key of the keyboard 2 is applied to a selection signal transmitting unit 4 for converting the other party's telephone number and other information from the position information of the key into a selection signal and outputting the selection signal. .

In the selection signal sending unit 4, key input data from the keyboard 2 is input to the input logic circuit 6.
In addition, the input logic circuit 6 arranges key input data at a fixed time interval based on a certain timing and outputs it.

The key input data output from the input logic circuit 6 is added to the memory 8 and stored. In this embodiment, a write pointer 10 for designating a write address for writing data to the memory 8 and a read pointer 12 for designating a read address for reading stored data are connected via a bus line. The write pointer 10 stores key input data at a predetermined address in the memory 8 in accordance with a write start signal from the input logic circuit 6. The read pointer 12 is stored in the memory 8
The selection signal data, which is the stored content, is sequentially read from the memory 8 in accordance with the read start signal applied from the output circuit 14 provided on the output side of the memory 8.

The selection signal data read from the memory 8 is applied to an output circuit 14, which outputs a pulse signal or a DTMF (Dual Tone) signal based on the selection signal data.
A selected signal (dial signal) including a modulated signal (tone signal) is output, and a mute signal MUTE is selectively output in accordance with certain conditions.

The amount of data stored in the memory 8 is applied from the write pointer 10 to a memory overflow detection circuit 16 provided as means for detecting the amount of stored data. In this embodiment, the memory overflow detection circuit 16 Detects that the amount of data stored in the memory 8 has exceeded a certain amount, that is, an overflow (overflow) from the amount of data stored from the write pointer 10, and generates a detection output.

When the amount of data stored in the memory 8 reaches the allowable storage amount, the memory overflow detection circuit 16 inputs the key input data to the input logic circuit 6 as a detection output until the storage data is completely read. A prohibition signal for prohibition is output, and a key input standby signal W is output.
The AIT is output to the display device 18. Display device 18
Is, for example, a light emitting diode 20 as a visual display means.
The wait signal WAIT from the memory overflow detection circuit 16 visually indicates the wait for key input.

The reference oscillation circuit 22 oscillates a clock pulse at the natural oscillation frequency of the crystal oscillation element 24. The clock pulse is frequency-divided by the frequency dividing circuit 26 at a constant frequency division ratio, and the frequency-divided output becomes a reference clock pulse. This reference clock pulse is supplied to a control circuit 2 as control means for the entire system of the selection signal transmission unit 4.
The control circuit 28 controls the timing of fetching the key input data of the input logic circuit 6 and the selection of the output of the output circuit 14 by the reference clock pulse, and controls the key input applied to the input logic circuit 6. A key press of the keyboard 2 is detected in accordance with the data, and a key press confirmation signal KL indicating key press confirmation and a control output LC ₁ for controlling the input logic circuit 6, the memory 8, the output circuit 14, etc. , to generate the LC _2. When the key press confirmation signal KL is applied to an auditory confirmation means such as an electroacoustic transducer or a visual confirmation means such as a light emitting display element, and if the key press is displayed audibly or visually, the key press is confirmed. The key can be easily confirmed by its display.

Therefore, in such a telephone, the memory overflow detection circuit 16 detects that the amount of data stored in the memory 8 for storing key input data exceeds a certain amount, and the amount of data stored in the memory 8 exceeds the certain amount. At this time, the input of the key input data of the input logic circuit 6 is inhibited by the detection output until all the stored data and the all-digit dial signal output of the memory 8 are read out, and the display device 18 is driven by the standby signal WAIT, and the standby signal WAIT is output. Display status. After the output of the all-digit dial signal output, the standby signal WAIT is released, so that key input data is written from the first digit of the memory 8 in response to the display, the memory 8 is read, and the dial signal output is transmitted.

FIG. 2 shows a dial signal output corresponding to a key input and a memory content of the memory 8 in the telephone. In this embodiment, a 16-digit memory is used as the memory 8, and key input data for 16 digits is added.
When the amount of data stored in the memory 8 reaches 16 digits, a standby signal WAIT is output, and key input is in a standby state until reading of the stored data in the memory 8 is completed. In this embodiment, when "0" to "6" are input, the standby signal WAIT is output, and the standby signal WAIT is output until "6", which is the last digit of 16 digits, is transmitted. . Then, from the time when the reading of the stored data in the memory 8 is completed (this time is confirmed by the display on the display device 18),
When the key input is started and the input of 16 digits (or lower digits) is performed again, writing to the memory 8 is performed from the first digit, and a dial signal is read out from the first digit. Accordingly, in this case, the input / output of the dial signal output of 32 digits with the standby time interposed is executed with the standby time required for reading the memory 8 being completed when the 16 digits are completed. Is repeated, a dial signal of many digits can be transmitted.

FIG. 3 is a block diagram of the telephone set shown in FIG.
Further, a telephone is shown in which a CPU 30 as a logic control means is installed at a preceding stage of the input logic circuit 6 for taking in key input data so as to take in key input data .

Therefore, the keyboard 2 is provided to the CPU 30.
When the key input data is added to the input logic circuit 6, the CPU 30 adds the key input data and a strobe signal STB for dividing the key input data by a predetermined digit as a timing for inputting the key input data. Further, when the amount of data stored in the memory 8 reaches a certain amount, that is, the storage allowable amount, the memory overflow detection circuit 16 detects the amount of data and outputs a standby signal WAIT to the CPU 30. On the other hand, a prohibition signal for prohibiting data fetch is output. As a result, the input logic circuit 6 stops taking in the input data until all the digits of the data stored in the memory 8 are output. Also, C
The PU 30 prohibits the input logic circuit 6 from inputting the key input data DATA and the strobe signal STB while the standby signal WAIT is being output, and displays the display on the display device 18 for displaying the prohibition state. Add output.

FIG. 4 shows an output control program for key input data in the CPU 30. In step S _1, it is determined whether the wait signal WAIT, when the standby signal WAIT is present remains in step S _1, prohibits the output of the key input data DATA and strobe signal STB. If there is no standby signal WAIT, the process shifts to step S ₂ to input the key input data DATA and the strobe signal STB to the input logic circuit 6. In this case, for example, one digit data of the dial signal is added to the input logic circuit 6.

[0025] Then, in step S _3, to determine the presence or absence of the standby signal WAIT again, when the wait signal WAIT is present remains in step S _3, prohibits the output of the key input data DATA and strobe signal STB. Step S
When the standby signal WAIT ₃ is judged that there is no, the process proceeds to step S _4, whether or not the key input has been completed it is determined. If the key input is not finished, the process proceeds to step S _2, enter again the key input data DATA and strobe signal STB to the input logic circuit 6, and when the key input is completed, the control program Terminate execution.

By executing such a control program,
While the standby signal WAIT is being output, the all-digit dial signal output, which is stored data, is read from the memory 8, and at the end of the reading, the standby signal WAIT is released. Input data is stored.

In this embodiment, a memory overflow detecting circuit 16 is provided as a data amount detecting means, and a memory 8 is provided.
When the amount of data stored in the memory reaches a certain amount, the output of the input logic circuit 6 is inhibited and the standby state is displayed. However, the writing of key input data to the memory 8 is read out according to the amount of data in the memory 8. And the amount of data stored in the memory 8 may be quantitatively displayed on the display device 18. In this case, the display device 18 displays L
The display according to the dial signal may be performed using a CD display.

[0028]

As described above, according to the present invention, the writing of key input data is controlled while monitoring the amount of key input data stored in the storage means, and the amount of stored data exceeds a certain amount. The key input data is prohibited and the key input is stopped by displaying the prohibition state, so that the operability can be improved and the destruction of the data stored in the storage means and the occurrence of erroneous output are prevented. Can,
Moreover, by repeatedly writing and reading the storage capacity of the storage means, it is made to function as a large-capacity storage means, and the maximum storage capacity of the storage means is not limited by the number of dial digits. Transmission can be realized and used not only for transmission of telephone numbers but also, for example, for selection signal transmission when receiving various services such as seat reservation service of transportation means such as railways and aircraft, correspondence service with financial institutions, computer access etc. can do.

[Brief description of the drawings]

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

FIG. 2 is a diagram showing the operation of the telephone according to the present invention.

FIG. 3 is a block diagram showing an embodiment of the telephone according to the present invention.

FIG. 4 is a flowchart showing an output control program of key input data and a strobe signal in the telephone shown in FIG . 3 ;

FIG. 5 is a diagram showing an operation of a selection signal transmitting device in a conventional telephone.

[Explanation of symbols]

 2 keyboard 4 selection signal sending unit 8 memory (storage means) 18 display device (display means) 30 CPU (logic control means)

Claims (1)

(57) [Claims] 1. A keyboard having a plurality of keys for inputting data by operating selected keys, receiving key input data from the keyboard, and inputting the keys.
Logic control means for outputting force data with strobe signal
And a strobe signal from the logic control means.
The key input data is divided into predetermined digits and stored sequentially.
When the amount of data stored in the storage means exceeds a certain amount, an input inhibition display output is generated together with an input inhibition output for inhibiting the writing of the key input data to the storage means, and the data is written to the storage means. When the reading of all the key input data is completed, the input prohibition output and the input prohibition display output are released, and the writing of the key input data to the storage means is resumed. A selection signal sending unit for sending the dial signal based on the key input data together with storing the key input data, and waiting for an input from the keyboard based on the input prohibition output output from the selection signal sending unit. And a display means for performing a display.