JPS6024758A - Portable input terminal device - Google Patents

Abstract

PURPOSE:To transmit precious information to many and unspecified facsimile terminals by providing a means for trasmitting character information inputted from a message input keyboard as a facsimile signal. CONSTITUTION:The portable terminal 21 is provided with a message input keyboard 23, a microcomputer 22 and a display means 25, and is connected to the facsimile terminal 42 via an acoustic coupler 37. The character information from the keyboard 23 is stored as character codes in the storing means 26 in the microcomputer 22, and at the same time displayed on the display means 25. When the keyboard ''during transmission'' is depressed, a transmitting procedure control means is actuated: communication with the facsimile terminal 42 is performed, the character codes from the storing device 26 are converted to sentence patterns, and then transmitted, thereby forming a small-sized, inexpensive, portable message transmitting terminal.

Description

[Detailed description of the invention] Industrial application field
Recommendation T of the International Telegraph and Telephone Consultative Committee (CCITT)
- This relates to a portable input terminal device that transmits data to a digital facsimile terminal standardized as 4 through the public telephone network.

Structure of a conventional example and its problems FIG. 1 is an external view of a conventional portable data input terminal device using a public telephone network.

FIG. 2 is a diagram showing the internal configuration of a conventional portable data input terminal 1 and the configuration of its system. Data input from the keyboard 2 is displayed on the display means 4, and is also stored in the storage means 3 as code information. When transmitting this information, by pressing the transmit key on the keyboard 2, the character information stored in the storage means 3 in the form of code information is modulated by the modulation means 6, and the speaker 6 of the acoustic converter is modulated.
is output to. This input terminal operates on a battery 7 so that it can be carried and operated. The acoustic signal output from the speaker 6 is input to the microphone 8 of the telephone set, passes through the public telephone line exchange 9, is demodulated by demodulation means 10 on the receiving side, and is received by the concentrator 11.

In this conventional transmission method, the information is transmitted as a code signal, so the transmission efficiency is high, but if a transmission error occurs, there is a possibility that it will have a large impact. Transmission data is often transmitted in ASCl 1 code or ISO code, but if a binod error occurs, the data is received as completely different characters. If this transmitted data is important data such as a monetary amount or a customer code, the impact is very large. Not only the two conventionally used portable input terminal devices, but also general terminal devices each have their own communication protocol r=l.
- It is generally not possible to communicate with an unspecified number of terminals.

On the other hand, conventional answering machines have been used for the purpose of receiving missed messages, but due to the poor interaction between machines and humans, it cannot be said that they are used effectively. In order to confirm or search for information, there is the inconvenience of having to listen to and confirm the content from beginning to end on a playback device and take notes.

OBJECT OF THE INVENTION The present invention solves the above-mentioned conventional problems. By transmitting character information as a facsimile signal, highly reliable information can be transmitted from any place, at any time, to any unspecified number of people. The present invention aims to provide a small and inexpensive portable input terminal device that can transmit data to existing facsimile terminals.

SUMMARY OF THE INVENTION In order to achieve the above objects, the present invention provides a means for converting character information input by a keyboard into facsimile character run length information, a means for generating a tonal transmission control signal, and a means for generating a tonal transmission control signal from a facsimile terminal. It is equipped with means for detecting control signals, modulation/demodulation means for transmitting and receiving binary transmission control signals between facsimile terminals, and high-speed modulation means for transmitting facsimile signals, and complies with the CCITT recommendations. Transmission control procedure using binary code signals For signal transmission and reception, a low-speed modem with an inexpensive and simple configuration is used.For facsimile signal transmission, complex and expensive optical systems are used to generate character run length information from code information. By eliminating the need for a type sensor mechanism and using it exclusively for facsimile information transmission, we have the effect of eliminating the need for complex and expensive high-speed demodulation means, and furthermore, these effects make it possible to provide a small and inexpensive portable facsimile transmission terminal. .

Description of examples Embodiments of the present invention will be described below with reference to the drawings.

A group commonly used as a digital facsimile without changing the facsimile transmission control procedure.
This will be explained using figures.

There are transmission phases from phase A to phase E, and in phase A, a call is set up. When a call is made from the transmitting terminal and the line is connected, the transmitting terminal sends out a calling tone (CNG) signal, which is a tonal signal. The receiving terminal receives the CNG signal and sends out a called terminal identification (CED) signal of a tonal signal. CNG signal is 11
This is an ooHz signal that is ON for 0.5 seconds and OFF for 3 seconds.

The CED signal is a 2100 Hz signal of 2.6 seconds to 4 seconds. In phase B, terminal constants are displayed and determined, synchronization status is checked, etc. The receiving terminal receives a binary-encoded digital identification (DIS) signal followed by a PIF
(facsimile information field) informs the transmitting terminal of all the functions possessed by the receiving terminal, and the transmitting terminal transmits the functions returned from among the functions by the digital command (DO8) signal of the binary code signal and the following P
Specify with IF. This DIS signal and DO8 signal are 3
00 bits/second or 2400 bits/second modem transmission. Note that 300 bits/second is standard. Then switch to the high-speed modem and use the training signal and training check (TCP) to condition the high-speed modem.
) signal is sent from a high-speed modem. When the receiving terminal completes the high-speed modem adjustment, it transmits a confirm readiness (CFR) signal, a binary-coded signal, at 300 bits/second (or 24 bits per second).
00 bits/sec) modem to instruct the sending terminal to send the message.

In phase C, the transmitting terminal follows the training signal by
Facsimile messages (FAX) and return to control (RTC) coded according to Recommendation T.4 in CCITT
Send a signal.

In phase D, message completion and reception confirmation are performed.

After the RTC signal, the end of the binary code signal (EO
P) Send the signal with a 300 bit/s (or 240 bits/s) modem. The receiving terminal sends out its confirmation (MCF) signal of the binary-coded signal with a 300 bits/second (or 2400 bits/second) modem.

In phase E, call recovery is performed. The transmitting terminal transmits a binary-coded disconnection command (DCN) signal of 300 bits/
(or 2400 bits/second) modem,
Instructs the receiving terminal to disconnect the line.

In FIG. 3, solid lines indicate signals of 300 bits/second or 2400 bits/second, dashed lines indicate tonal signals, and dotted lines indicate signals of the same transmission speed as facsimile signals.

FIG. 4 shows an example of the external appearance of a terminal device according to the present invention, and FIG. 6 shows an example of a block circuit of the internal configuration of the device.

This embodiment is a terminal device whose purpose is to transmit character information input from a keyboard using a group 1 facsimile terminal as a receiving terminal. Reference numeral 21 denotes a terminal device main body of the present invention, which is connected to a telephone set 40 from a terminal 36 via an acoustic coupler 37, and then to a group facsimile terminal device 42 through a public telephone line exchange 41. The inside of the terminal device main body 21 according to the present invention will be explained. 2
3 is a keyboard, which is connected to an input port of the microcomputer 22. The signal received by the microphone 39 in the acoustic coupler 37 passes through the terminal 35 and is input to the tonal transmission control signal detection means 32 and the low-speed demodulation means 33 for binary transmission control signals, and the output of the tonal transmission control signal detection means 32 and The output of the low-speed demodulation means 33 for binary transmission control signals is connected to the input port of each microcomputer 22. 25 is a display means connected to the output port of the microcomputer 22.

29 is a high-speed modulation means, 30 is a low-speed modulation means for binary transmission control signals, and 31 is a tonal transmission control signal generation means, which are connected to the output port of the microcomputer 22. The output of the high-speed modulation means 29, the output of the binary transmission control signal modulation means 3°, and the output of the tonal transmission control signal generation means 31 are connected to a mixing means 34, and the output of the mixing means 34 passes through a terminal 36. and is connected to the speaker 38 of the acoustic coupler 37. The microcomputer 22 includes a display control means 24 and a storage means 26.
, code conversion means 27, and transmission procedure control means 28. 36 is a battery.

Next, the operation of the above embodiment will be explained. In FIG. 6, character information i input from the keyboard 23 is input to the microcomputer 22, displayed on the display means 26 by the display control means 24, and simultaneously stored in the storage means 26 as character code information.

Next, when transmitting the character information stored in the storage means 26 of this terminal device to the group ■ facsimile terminal device 42 through a public telephone line, an acoustic coupler 37 is connected to the terminal 35 of the terminal device main body 21. , telephone handset 4
o into the acoustic coupler, dial the telephone, and press the send key on the keyboard 23. By pressing the transmission key, the transmission procedure control means 28 operates, and when the CNG transmission signal is inputted to the tonal transmission control signal generation means 31 with a period of 0.6 seconds ON and 3 seconds OFF, the frequency is 11ooHz.

A CNG signal that is ON for 0.5 seconds and OFF for 3 seconds is generated, passes through the mixing means 34 and the terminal 36, and is output to the speaker 38. When the line is connected, the CED signal from the group facsimile terminal device 42, which is the receiving terminal, is received by the microphone 39, passes through the terminal 35, and is passed through the tonal transmission control signal detection means 32 and the low-speed demodulation for binary transmission control signal. Entering the means 33, the tonal transmission control signal detecting means 3
2 detects the CED signal, and the detection signal is transmitted to the transmission procedure control means 28 of the microcomputer 22.

Then, from the group facsimile terminal device 42,
All functions of the group facsimile terminal device 42 are notified by IS signals. This DIS signal is the microphone 39
and through terminal 35, 300 bits/sec binary -
The signal is input to the transmission control signal low-speed demodulation means 33, demodulated, and identified by the transmission procedure means 28 of the microcomputer 22. The transmission procedure control means 28 specifies a function selected from among the functions indicated by the DIS signal sent from the group facsimile terminal device 42 using the DO3 signal.

This DO8 signal is modulated by a low-speed modulation means 30 for binary transmission control signals of 300 bits/second, passes through a mixing means 34 and a terminal 36, and is output to a speaker 38.

Next, the transmission procedure control means 28 switches to the high speed modulation means 29 to send out the training signal and the TCF signal at 2400 bits/sec. The training signal and the TCP signal also pass through the mixing means 34 and the terminal 36 and are output to the microphone 38. The group facsimile terminal device 42 on the receiving side adjusts its high-speed modem using this training signal.

When the group facsimile terminal device 42 completes the adjustment of the high-speed modem, it transmits a CFR signal at 3oO bits/second. If the high-speed modem is not sold due to adjustment, it will send a training lost (FTT) signal and request retraining. The received CFR signal is demodulated by the binary transmission control signal low speed demodulation means 33, and the transmission procedure control means 28 identifies the CFR signal. When the CFR signal is identified, the high-speed modulation means 29 transmits the character information to be transmitted following the training signal as a facsimile signal. Since the character information to be transmitted is stored as code information in the storage means 26, the code information can be converted into a modified Huffman code defined as the standard encoding method of Group I or a modified read code which is an optional encoding method. Convert to

This conversion is performed by code conversion means 27. This conversion converts the character code into a document pattern. An RTC signal is attached to the end of this facsimile signal and sent. These training signals, facsimile signals and RTC signals are modulated by high speed modulation means 29 and sent. After sending out the RTC signal, the transmission procedure control means 28 switches to the low-speed modulation means and sends out the EOP signal at SOO bits/second. The group facsimile terminal device 42 is E
The OP signal is confirmed and the MCF signal is sent.

The MCF signal is a binary transmission control signal low-speed demodulation means 3
3, and is input to the transmission procedure control means 28 for identification. The transmission procedure control means 28 determines that the transmission is now complete, modulates the DCN signal with the binary transmission control signal low-speed modulation means 3o, and sends it out at 300 bits/second, completing the communication.

In this embodiment, since character run length information, which is a facsimile signal, is generated from the code information corresponding to the characters inputted from the keyboard 23, a complicated and expensive optical sensor mechanism is not required, and the terminal device is used only for transmission. Therefore, a low-speed modulation/demodulation means is required for transmission control signals, but a training signal is required for high-speed transmission.

There are TCP signals, facsimile signals, and RTC signals, but since these are only for transmission, only a high-speed modulation means is required, and a complicated and expensive high-speed demodulation means is not required, making it possible to easily transmit documents by facsimile. This makes it possible to provide an inexpensive portable input terminal device.

Effects of the Invention The present invention has the above-described configuration, and provides the following effects.

(,) The code information is input from the keyboard and stored in the storage means. Since the character information stored in the fax machine is directly converted into facsimile information, a complicated and expensive optical sensor mechanism is not required.

(b) Character information entered from the keyboard can be directly transmitted by facsimile, so there is no need to create a document on paper and then transmit it by facsimile.

(C) Since an existing group facsimile terminal can be used as a terminal for receiving information, communication can be performed simply by preparing the portable input terminal device of the present invention.

(d) Rather than transmitting information as coded signals,
Since the character pattern itself is transmitted, even if a transmission error occurs, it is unlikely to become a completely different character.
Enables highly reliable communication.

(e) Since there is no high-speed demodulation means, it is easy to configure with an acoustic coupler, making it convenient to carry and inexpensive.

[Brief explanation of the drawing]

Figure 1 is an external view of a conventional portable data input terminal that uses the public telephone network, Figure 2 is a block diagram showing the internal configuration and system configuration of the portable data input terminal, and Figure 3 is a block diagram showing the internal configuration and system configuration of the portable data input terminal. 4 is an explanatory diagram for explaining the transmission control procedure of a Group III facsimile, FIG. 4 is an external view of a portable input terminal device according to an embodiment of the present invention using a Group III facsimile as a receiving terminal, and FIG. FIG. 2 is a block diagram showing the internal configuration and system configuration of the input terminal device. 21... Terminal device body, 22... Microcomputer, 23... Keyboard, 26...
... Storage means, 27 ... Code conversion means,
28... Transmission procedure control means, 29... High speed modulation means, 30... Low speed modulation means for binary transmission control signal, 31... Tonal transmission control signal Generating means, 32... Tonal transmission control signal detection means, 33... Low speed modulation means for binary transmission control signals, 42... Group facsimile terminal device. Name of agent: Patent attorney Toshio Nakao and 1 other person 1 illustration/

Claims (1)

[Claims] Means for converting character information input by a keyboard into facsimile character run length information, and tonal transmission f
means for generating a lilJ control signal; means for detecting a tonal transmission control signal from a facsimile terminal; modulating and demodulating means for transmitting and receiving binary transmission control signals to and from the facsimile terminal;
and high-speed modulation means for signal transmission.