JPS6215960A - Data communication method - Google Patents

Abstract

PURPOSE:To simplify data communication by constituting 1-byte data of the combination of 8 kinds of dial signals, using one kind among the remaining dial signals as a data delimiter signal and sending the data while each 1 byte data is clipped by the delimiter signals at the transmission of 1-byte data or plural byte data. CONSTITUTION:Eight kinds of dial signals (0-7) correspond to 8 bits (0-7), 1-byte data is constituted by the combination of the 8 kinds of dial signals in time series, a mark * is used as the data delimiter signal and mark # is used as a data frame delimiter signal. When a data bit is, e.g, 0, signals #8 or ** being consecutive are sent and when the data bit is 1, a data delimiter symbol *, dial signal 0, a data delimiter symbol * are sent. Further, the start and end of data communication are detected by sending the data frame delimiter symbol # before and after a data frame. Thus, even a multi-frequency type telephone set is connected to a host controller to apply data communication simply.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a data communication method using a telephone line.

2. Description of the Related Art Conventionally, as a method for data communication using a telephone line 111, a modem 2 is connected between a telephone line network 1 and a data communication network 13, and this modem 2 is used to perform data communication. The baseband data from the 4A equipment N3 is modulated with a frequency in the frequency band used in the FL telephone line network 1, and transmitted to the Ti telephone line network 1J.

On the other hand, the modulated signal from the telephone line IIR1 is demodulated by the modem 2, converted into baseband data, and transmitted to the data communication device 3.

In addition, as another conventional example, an acoustic coupler 5 is connected between a telephone set 4 and a data communication device 3 as shown in FIG. , and then injected into the telephone network 1. On the other hand, the audio from the telephone Fil12J1 is converted into digital data by the acoustic coupler 5, and then transmitted to the data communication device 3.

Problems to be Solved by the Invention In the conventional configuration described above, a special conversion device such as a modem or an acoustic coupler is required in order to perform data communication over a telephone line network. Furthermore, these variable Mk devices are physically large and expensive.

Means for Solving the Problems In order to solve the above-mentioned problem Jjj, the present invention makes the 8 types of dial signals of Dai One of the two types of dial signals is used as a data delimiter signal, and 1 byte data is constructed by combining 8 types of dial signals corresponding to 8 bits from 0 to 7 in a series. When transmitting, this 1-byte data is sandwiched between the data delimiter symbols mentioned above, and when transmitting multiple byte data, multiple byte data are sandwiched by 1 byte I by the γ-ta delimiter symbol mentioned above. data communication.

Effect: By using this communication method, after establishing a physical communication link with the other party's phone through a normal telephone call sequence prior to data communication, As seen in the conventional example, the telephone FA network was used even with only a multi-frequency telephone set, without using a DEM or an acoustic coupler. - It is possible to realize 1 through 1, and even more, just by covering the external circuit of
J tllll is also possible.

EXAMPLE An example of the present invention will be described below based on the drawings. tree 1
The 42-way system that becomes clear in 1 is structured as follows. However, eight types of dial signals from 0 to 7 of the dial signal are made to correspond to 8 data bits from 0 to 7, and a time-series combination of 8 types of dial signals corresponding to these 8 bits is created. This constitutes 1 byte data. The dialing signal in multi-frequency telephones is low group (69
711z, 77011z, 852flz, 941tl
z) four frequencies and high group (1209112°1336
112, 1477H2), a combination of three frequencies, a numerical value from 0 to 7, and two special signals, * and #. In this embodiment, * is used as a data delimiter signal, and # is used as a data frame delimiter signal.

Frequency and content are not shown in Table 1.

FIG. 1 shows a case where binary data of 0.1.2.3, for example, is transmitted. When a data bit is 0, it means that there is no signal, and therefore, to represent 0, symbols are consecutive, such as #* or **. When sending 1, data delimiter *, ``dial signal 0, data delimiter ``δ
It can be configured by sending the first table *. When transmitting 3, it can be configured by transmitting the data delimiter *, the dial signal 01, the dial signal 1, and then the data delimiter *. Furthermore, the start and end of data communication can be detected by transmitting the data frame delimiter symbol # before and after the data room. With this method, it is possible to express not only binary data but also almost all codes used in information processing such as JiS code and ASCii code.

FIG. 2 shows an example using the method of the present invention.

In FIG. 2, 6 is a dial number a generator that generates a dial signal used in place of a telephone. The dial signal generator 6 is composed of a multi-frequency signal switch 61, a multi-frequency signal generator 62, and a control 63.

The multi-frequency signal switch 61 has a first multi-frequency signal input terminal 611 from the telephone set 4, a second multi-frequency signal input terminal 612 from the multi-frequency generation circuit 62 in the dial signal generator 6,
Selected multi-frequency signal output terminal 613 and switch 61
It has a switching control g signal input terminal 614 for controlling w7#'. The multi-frequency signal generator 62 is connected to the multi-frequency signal output terminal 6
21 and a selection control signal input terminal 622 for selecting a multifrequency signal. Further, the controller 63 includes control signal output terminals 631, 632 for controlling the multi-frequency signal switch 61 and the multi-frequency signal generator 62, and a connection terminal 633 for connecting to a host controller (not shown) such as a host computer. has.

The data communication procedure will be explained in more detail.

When the dial signal generator 6 receives a multi-frequency transmission instruction from the host controller, the controller 63 first switches the multi-frequency signal switch 61 to its second multi-frequency signal input terminal 612.
After connecting to the multi-frequency generation circuit 62 side via the multi-frequency signal switching device 61, the DC loop in the multi-frequency signal switching device 61 is closed and off-hook. Every time transmission data is received from the upper controller, a dial signal is transmitted to the telephone line network 1 using the method described above. When all data has been sent, the upper control will indicate the end of sending.

After notifying the roller, the DC loop in the multi-frequency signal switch 61 is opened, and then the switch 61 is switched to the telephone 4 side via its first multi-frequency signal input terminal 611. At this time, data communication is performed by the telephone 4 using the selected dial signal.

Effects of the Invention According to the present invention, it is possible to easily perform data communication using only a multi-frequency telephone or by connecting it to a host controller, without using a conventional modem or acoustic coupler. .

[Brief explanation of drawings]

FIG. 1 is a diagram illustrating the relationship between transmission data and a die 1 full signal in terms of frequency combinations in order to explain an embodiment of the data communication method according to the present invention, and FIG. 2 is an example of an embodiment using the method of the present invention. Block diagram without examples, Figures 3 and 4
The figure is a block diagram for explaining a conventional example. DESCRIPTION OF SYMBOLS 1...Telephone line network, 4...Telephone device, 6...Dial signal q generator, 61...Multi-frequency signal switching device, 62...
...Multi-frequency signal generation circuit, 63... Controller agent Yoshihiro Morimoto ＼ K # ≧ゝFigure 2 Figure 3 Figure 4 Figure 6... Meeting 111 61--- Printing 11 plays 2 voice orderer 62-・7 signal generation 1 series

Claims (1)

[Scope of Claims] 1. Of dial signals in a multi-frequency telephone connected to a telephone line network, eight types of dial signals correspond to data bits 0 to 7, and the remaining two types One type of dial signal is used as a data delimiter signal, and 1 byte data is constructed by a time-series combination of 8 types of dial signals corresponding to 8 bits from 0 to 7. When transmitting data, this 1 byte A data communication method that performs data communication by sandwiching data between the data delimiter symbols and transmitting the data, and when transmitting multiple byte data, transmitting a plurality of byte data by sandwiching each byte using the data delimiter signal. 2. Among the dial signals, the last type of dial signal is used as a data frame delimiter signal and is transmitted before and after the data frame to notify the start and end of data communication. Data communication method described. 3. The dial signal is selected from the signals of a dial signal generator provided outside the telephone by a control signal generated by a controller provided outside the telephone. Data communication method.