DE2709461A1 - Pushbutton dialling telephone unit with digital display - includes computer circuit linked to data store and switching circuit - Google Patents

Abstract

A telephone has a keyboard for pushbutton dialling with buttons for figures 0 to 9 and a variety of other buttons. The telephone unit includes a store for data with a digital display for the numbers which have been punched in. The data store is used as an output store and is connected to an output coder operating the display. The data store is also connected to two of a set of three linked switches. It is also connected to a small computer which is linked to the input keyboard.

Description

Telephone calculator

The invention relates to a telephone station with a keypad and additional function keys, with which both touch dialing can be carried out, as well as data can be entered into a data memory, this data memory is connected to a display device for the keyed in digit sequence.

From the book "Nachrichtenvermittlung" by H.Oden, it is known such To use telephone stations for the so-called simple data service is the data memory in a central data processing system or in a separate data terminal.

The user can use the keypad for two functions.

This is advantageous when the touch dialer is used as an input terminal for a data storage device. A use together with a central arithmetic logic unit for performing arithmetic operations is outdated, however, since it is now less expensive to have a pocket calculator next to each telephone station do ask.

Telephone station and calculator as separate devices on the same Using a place is also not yet an optimal solution. Although it is inexpensive and very easy to implement, but leaves many possibilities unused result from the combination of both devices in a single unit.

It is therefore the object of the invention to provide a telephone station, on the one hand the possibilities of a pocket calculator with data memory and display device for telephony and data transmission operations, on the other hand, too fulfills all the functions of a small computer, with as many as possible for computing Components that are required anyway can also be used for telephone operation.

The telephone station according to the invention is characterized in that the data memory is the output memory of a pocket calculator circuit and is self-contained together with the display device in the telephone station, that the display device is part of this known pocket calculator circuit whose other parts are also housed in the telephone station, that the output memory is constructed in such a way that data is stored serially and in parallel and not delete can be read out that means are provided which the Output of a stored in the output memory and in the display device displayed sequence of digits, depending on the position of an output switch, both in the form of dialing characters as well as in the form of audio frequency data pulses allow on the telephone line and that further means are provided that the storage of data arriving on the telephone line in the output memory enable. This telephone station can be used as an independent small computer and use as a data input / receiving station. Especially can be done while on the phone can be calculated and the calculation results can be accessed by simply pressing a button be transmitted to the interlocutor. This intensifies communication considerable and is particularly advantageous when technical discussions or Sales talks can be conducted over the phone. There is also no need for manual / visual transmission that occurs when reading a separate pocket calculator and keying in the read digits in a data entry station often leads to errors. Another The advantage that saves time for the user is the possibility of Redial, which can be triggered any number of times by simply pressing a button once the number to be dialed has been keyed into the output memory.

An embodiment of the telephone station according to the invention is thereby characterized in that the output memory of the pocket calculator circuit is a circulating memory is that by pressing a send button a flip-flop is set, which in turn causes a clock to generate a clock fl that is in a tapped divider is divided down to two different clocks f2 and f3 that in certain Positions of the output switch of one of the two clocks with different clock speeds is fed to the output memory, that thereby the content of the output memory circulating air and thereby serially either to a transcoder and from there in the form of Dialing characters are issued on the telephone line, or for the purpose of data transmission is used to key a tone frequency generated by a tone frequency generator and that the end of the circulation of the memory contents is determined by a counter, which resets the flip-flop at the end of the cycle and thus switches off the clock. With the help of additional circuit parts, data and dialing characters are output from the output memory in the pocket calculator circuit to the telephone line enables.

Another embodiment of the telephone station according to the invention is characterized in that for data reception a contact of the output switch, if this is in the "data output" position, one is provided for serial storage Input of the output memory via a gate circuit, a demodulator and a Filter circuit connects to the telephone line, and that the gate circuit through a flip-flop and a delay circuit is controlled and from the telephone line then does not allow incoming data pulses to reach the output memory when the flip-flop or the delay circuit during data output on the telephone line are set. and that for storing the data of the clock generator by a received Start bit set in motion via a delay circuit and a second flip-flop will. This enables incoming data to be stored in a simple manner and additionally ensures that during the time in your own data are output, no data can be stored.

A development of the telephone station according to the invention is thereby marked that the keys on the keypad as well as the function keys only operate simple contacts and that the stored digits and commands are carried out using a key encoder commonly used in pocket calculators. In order to the complicated set of keys usual in touch dialing devices is replaced by a simple one and a keyboard that is less susceptible to faults is replaced, making the telephone station more reliable and cheaper.

Another development of the telephone station according to the invention is characterized in that a charge key is provided after its actuation incoming charge counting pulses are also fed to the key encoder. And that every single counting pulse is the addition of a previous one in a working memory the number entered in the pocket calculator circuit to the number in the output memory Number initiated. This can be used, if not to be expected, and the costs for a charge unit previously entered in the main memory of the ash calculator circuit the telephone charges accruing during a call in currency amounts made visible on the display and noted down at the end of the conversation or in one additional data memory can be stored.

The latter enables a further refinement of the telephone station according to the invention. It is characterized in that a connection socket for another data processing or data storage device is provided and that when a switch is operated, data stored in the output memory also can be output to the connection socket.

An exemplary embodiment of the telephone station will now be based on two figures described in more detail according to the invention and its function explained.

Fig. 1 shows the top view of a key and display panel of a Telephone station according to the invention; Fig. 2 shows a basic circuit diagram of the telephone station according to the invention.

In Fig. 1 is a housing 1 of a telephone station according to the invention shown, the top of which forms a button and display panel. At the top There is a multi-digit 7-segment display on the button and display field AZ of commercial design. In the middle of the keypad are in the usual arrangement three times four dial keys 3 for the digits 1, 2, 3 ... 0 and for two special characters of the switching technology built in. To the right of and below The marker keys have two rows of function keys 4 to 12.

Db are symbols of these function keys shown in the drawing familiar from pocket calculators and therefore does not require any explanation. The function keys are something smaller than the symbol keys and can be colored differently to avoid confusion when using the buttons.

There is a latching at the bottom right of the button and display field executed, illuminated on-off button 13, which is used to switch the power supply on and off the telephone station is used. To the left of the on-off button, which is also the Perceives the function of a control lamp, is a writable field 14 for entry a station identifier and a charge key GT are provided. The left edge of the key and display panel finally contains an output switch AS, which can be brought into three positions (D = data output, R = arithmetic, W = dial), a send key S, which is not latching and the output of data or triggers a dial tone on the telephone line, provided the output switch is on is in the "data output" or dialing position and a latching key SCH, which is actuated when the data output on an additionally available data processing or data storage device via a device that is not visible in the figure Connection socket is desired.

The basic structure of the circuit of a telephone station ziigt Fig. 2. The circuit consists of a computer part RE, a complete pocket calculator circuit, as described in DT-OS 24 40 072, furthermore from a telephone part, of which in the basic circuit diagram of FIG. 2 only one contact GU of the Hook switch is shown, as well as additionally necessary circuit components, which the interaction from the computer part and the telephone part. The computer part contains in detail an arithmetic unit R with its output memory AGS, which has a display decoder ADK controls the display AZ. In addition to a necessary sequence control ABL and a additional working memory ABS, which can be activated by pressing buttons 11 and 12 or is read, the computer part contains a key encoder TK, which the Numbers and commands corresponding to the individual keys into one of the arithmetic units R implements processable code.

The above-mentioned additional circuit components that make the interaction from the computer part and the telephone part can be summarized in three groups.

A first group is responsible for data output and data reception. It consists of a central clock generator TG and a downstream tapped one Divider TE, such as a flip-flop chain. It also contains an audio frequency generator TFG, a demodulator DM, two gate circuits T1, T2, two filters FT1, FT2 as well as a counter Z, two flip-flops FF1, FF2 and two delay circuits V1, V2. A second group is responsible for the output of min dial characters. she uses from the first group the clock generator TG with the downstream divider TE, the Counter and one of the flip-flops FF1, moreover it contains a transcoder UC and a driver TR.

The third group of components consists only of a filter FT3 and the Charge button GT and is used to generate charge counting pulses when the charge button is pressed to the key encoder. Ultimately, it fulfills a central function the output switch, which has three positions in three switching levels I, II, III can and determines whether a sequence of digits stored in the output memory has a greater Speed in the form of audio frequency pulses or at a lower speed is output in the form of dialing pulses on the telephone line FL, or whether the The computer can only be operated as a desktop computer when it is separated from the telephone.

The following modes of operation of the telephone station are possible: 1.) Computing without calling.

2.) Receive a call, pick up the phone and speak.

3.) Dialing and repeated dialing.

4.) Calculate while talking on the phone.

5.) Transferring data while making a call.

6.) Receive data while calling.

7.) Save data on an additional device.

8.) Show charges while you are on the phone.

The following is the interaction of the individual circuit parts are described during the possible operating modes listed above: 1.) Calculating without making a phone call: The power supply for the telephone station is on switched on by key 13. The output switch AG is in the "Calculate" position (R) and separates the computer circuit RE: from the entire further circuit. the Telephone station is thus an independent desktop computer in pocket calculators known way to use.

2.) Receiving a call, picking up and speaking: This operating mode takes place in the manner generally used for telephone sets. Button 13 needs Not to be switched on when the computer is not to be used and none Data should be received. The output switch AS can be in any position take in.

3.) Dialing and repeated dialing: Key 13 is switched on, then the sequence of digits to be dialed is keyed in. It then appears in the display unit AZ and can be checked for accuracy. Now the output switch becomes AS brought into position ?? Select11 (W).

This creates two connections: a connection between a first frequency divider output and the clock input of the output memory, the the counter Z is parallel and a connection between an output of the output memory AGS and the transcoder UC. After these two connections have been made the land apparatus 11A is lifted and with it the hook switch contact GU closed. The dialing process can now be initiated by pressing the ST send button : The transmit key ST sets the flip-flop FF1 via the delay circuit V1. This starts the clock TG and opens the gate T1. In the divider TE the fast clock fl of the clock to one of the speed of the dialing pulses adapted slow clock f2 down. This clock is now sent to the clock input of the Output memory and circulates its contents. The saved sequence of digits is output serially to the transcoder. This converts the encoded memory content into dialing pulses, which are transferred to the telephone line via the driver TR. The counter Z also receives the clock of the divider TE and counts the individual pulses. After a certain number of strokes, which is the number of bits in the output memory corresponds, it emits a reset pulse to the flip-flop FF1, which is the clock TG switches off and gate T1 closes. The desired telephone connection comes does not take place because the selected participant is speaking or because there is no free one Line is available, the dialing process can be started by pressing the send button S. can be repeated as often as required.

4.) Calculating while making a call: There is a telephone connection and there is a need to calculate something during the conversation. In addition key 13 must be switched on and the output switch AS in position "arithmetic" (R) to be brought. The calculator can then be used as an independent desktop calculator.

5.) Transferring data while making a call: Was e.g. of telephoning calculated a result that the conversation partner communicated is to be, the output switch AS is brought to the "data output" position (D). Thus, on the one hand, a second output of the divider TE is connected to the clock input of the Output memory AGS connected, on the other hand via the gate circuit T1 a connection between the output of the output memory AGS and the audio frequency generator TFG. After pressing the transmit button ST, the clock generator TQ is in operation as in the dialing process is set, which circulates the content of the output memory once. Commissioning of the clock generator TG does not take place immediately, but only after a short period of time, which is set by the delay circuit V1. During this period is the audio frequency generator TFG via an output of the delay circuit V1 caused to emit a signal on the telephone line. This signal is used the recipient of the data as a start bit rar the storage of the data arriving immediately afterwards.

The memory content is circulated at a higher clock speed, as a dialing process, since the clock f3 via the tap in the middle of the divider chain TE is removed and is therefore faster. There is also no U. Coding of the Memory content but control the data pulses emitted by the output memory directly the output of the audio frequency generator TPG and clock its output alternating voltage. This is fed into the telephone line FL via the frequency-selective filter FTW. The handset normally remains in operation during the data transfer. At Places where the data transmission is influenced by loud noise In general, the range of the audio frequency rarely used for data transmission is possible but also a switch to switch off the handset or the microphone during the data transmission are provided.

6.) Receive data while telephoning: Above the switching level III of the output switch AS is in the switch position data output 'a connection between a. Input of the output memory intended for serial storage AGS and dea demodulator DM manufactured the audio frequency data lap pulses of a specific Frequency Over the frequency selective filter FT2 receives from the telephone line and converts them into DC voltage pulses. The gate circuit T2 between the debodulator and output memory blocks this connection as long as own data or dialing characters on the telephone lead. The gate circuit To this end, T2 is driven by both flip-flop FF1 and delay circuit V1. This ensures that data that you have sent yourself cannot be received again the content of the output memory is corrupted.

The shift clock f3 required for storing the data is again obtained by the clock generator TG and the downstream divider TE. The clock generator is controlled in addition to the second flip-flop FF2. The start of the clock generator is, however, by the delay circuit V2 connected upstream of the flip-flop by one Bit length delayed. This happens because the data that precedes the data Start bit that controls the delay circuit V2 and thus the storage process initiates, should not be saved with. After filling up the AGS memory the flip-flop FF2 is reset by the counter Z and the clock is thereby switched off.

7.) Save data on an additional device: via a switch SCli data pulses that are emitted on the telephone line can also be transmitted via a Connection socket for an additional device, such as a tape storage device TB or a printer DR are fed. This storage of data can also be done independently of the telephone part the telephone station when the handset remains on-hook.

8.) Display charges while making a call: Via a frequency-selective Filter FT3 enter office counting pulses in the key encoder TK when the charge key GT was pressed and brought into the detent position.

The charge counting pulses affect the key encoder with each pulse the addition of a stored in the main memory ABS of the pocket calculator circuit Number for the content of the output memory AGS. The unit charge is now in the working memory keyed in, so are on the display of the telephone station during the call the accrued charges are displayed in currency units. You can after the end of the conversation, for example, entered into a connected data memory or, for example be transmitted to a central data station.

6 claims 2 B1. drawings

Claims (6)

Claims 1. Telephone station with a keypad and additional Function keys that can be used to carry out both touch dialing and data can be entered into a data memory, this data memory with a display device for the keyed in digit sequence is connected, thereby characterized in that the data memory is the output memory of a pocket calculator circuit (RE) is and is located together with the display device (AZ) in the telephone station itself is that the display device (AZ) is part of this known per se Pocket calculator circuit is, its other parts also in the telephone station are accommodated that the output memory (AGS) is constructed so that data can be stored serially and in parallel and read out without being deleted, that means are provided which the output of a stored in the output memory and the sequence of digits displayed in the display device, depending on the position an output switch (AS), both in the form of dialing characters and in the form of Allow audio frequency data pulses on the telephone line and that other means are provided that the storage of incoming on the telephone line Enable data in the output memory. 2. Telephone station according to claim 1, characterized in that the output memory (AGS) of the pocket calculator circuit is a circulating memory that by pressing a send button (S) a flip-flop (FF1) is set, which in turn causes a clock (TG) to generate a clock fl that is tapped in a Divider (TE) is divided down to two different clocks f2 and f3 that in certain positions of the output switch (AS) one of the two clocks is different Clock speed is fed to the output memory that the content of the Output memory circulates and thereby serially either to a transcoder (UC) and from there in the form of dialing characters on the telephone line, or for the purpose of data transmission for keying one of a tone frequency generator (TFG) generated audio frequency is used and that the end of the circulation of the memory content is determined by a counter (Z), which at the end of the cycle the flip-flop (FF1) resets and thus switches off the clock generator TG. 3. Telephone station according to claim 2, characterized in that for data reception a contact of the output switch (AS), if this is in position "Data output" is an input of the output memory intended for serial storage (AGS) via a gate circuit (T2), a demodulator (DM) and a filter circuit (FT2) connects to the telephone line (Flj), and that the gate circuit through a flip-flop (FF1) and a delay circuit (V1) is controlled and by the Telephone line incoming data pulses then do not reach the output memory leaves when the flip-flop or the delay circuit during data output are set on the telephone line, and that for storing the data of the Clock by a received start bit U via a delay circuit V2 and a second Flip-flop FF2 is started. 4. Telephone station according to one of the preceding AllsprUchc, thereby marked that the counting keys as well as the function keys are only simple contacts press and that the stored digits and commands via a Key coders commonly used in pocket calculators are carried out. 5. Telephone station according to claim 4, characterized in that a charge button (OT) is provided, after which incoming charge counting pulses are received are also fed to the key encoder and that each individual counting pulse the addition of a previously in a working memory (ABS) of the pocket calculator circuit number entered to match the number in the output memory (AGS). 6. Telephone station according to one of the preceding claims, characterized characterized in that a connection socket for a further data processing or data-storing device is provided and that after pressing a switch SCH data stored in the output memory can also be output to the connection socket can.