JP2000295361A - Transmission system for data collecting/distributing terminal - Google Patents

Abstract

PROBLEM TO BE SOLVED: To automatically switch a DTMF signal mode to/from a modem communication mode by sending out a prescribed signal or prescribed data pattern. SOLUTION: A call originating terminal is an announce device having a sensor and a call terminating terminal is connected to a host computer. The call originating terminal connects a line by dial transmission and operates in the DTMF mode after the line connection. The call originating terminal transmits a modem switching command # and the call terminating terminal is switched to a modem and made into modem connection. Data STX DATA ETX are transmitted/received between the call originating terminal and the call terminating terminal. The call originating terminal transmits a DTMF switching command STX #ETX, performs a DTMF connection and transmits sensor information *5555*. The call originating terminal transmits the modem switching command # and is made into modem connection. Data STX DATA ETX are transmitted/received between the call originating terminal and the call terminating terminal.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a data collection / delivery terminal transmission system for collecting and delivering data between a host computer connected to a telephone line and a data terminal.

[0002]

2. Description of the Related Art When data is collected and distributed between a host computer connected to a telephone line and a data terminal, data transmission via a modem and DTMF (Dial Tone Mult) are performed.
i Frequency) There is a method of transmitting and receiving simple data using a signal. The communication mode transfer method is DTMF when the line is connected.
When it is desired to perform data transmission / reception using a signal and to switch to data transmission via a modem, a predetermined tone signal is transmitted, and this is detected to transfer to a modem communication mode. Also,
In some cases, a DTMF signal at the time of an automatic response automatically switches between telephone, fax, and modem. When the call and data transmission are mutually switched, a person performs a predetermined operation to switch to each mode.

FIG. 3 is a message sequence diagram of a transmission method of a data collection and distribution terminal in a conventional example. The prior art will be described in more detail with reference to the drawings. As an example, it is assumed that the calling terminal is a notification device having a sensor, and the called terminal is connected to a host computer. A. When updating master data (1) The calling terminal dials and connects the line, and the called terminal switches to DTMF reception and waits for a signal. (2) The calling terminal sends a terminal ID signal "* 12345667 *" to make the called terminal (host computer) specify the calling terminal. (3) The called terminal sends out the permission signal “**”. (4) The calling terminal transmits a modem switching command “######”, and the called terminal switches to the modem and transmits a carrier signal. (5) The calling terminal switches to the modem, enters the carrier receiving state, and is connected to the modem. (6) Data "STX DATA ETX" at calling terminal-called terminal
Transmission and reception. B. In case of sensor alert (7) Open the line and repeat the above (1) to (3). (8) The calling terminal transmits sensor information “* 5555 *”. (9) The called terminal sends out a response signal “**”. (10) Line release

[0004]

However, in the transmission method of the conventional data collection / distribution terminal, if data transmission is attempted via a modem, it takes 20 to 30 seconds to negotiate the modem and protocol before data can be transmitted. Preparation is required before If the amount of data is small, this time is wasted, and the telephone charge increases for the amount of data. Therefore, when the data amount is small, DTMF
This is done by signal and often through a modem. For example,
A DTMF signal is used only when a change in the state of the sensor is informed, and via a modem when file transfer or data encryption is required. The problem here is that when transmitting data via modem, if you need to notify the sensor status, you must disconnect the line and reconnect to send data. is there. In the prior art, the switching can be automatically performed until the switching to the modem is performed. However, there is a problem in that switching from the modem to the communication system requires a human to perform a predetermined operation.

[0005] The present invention has been made in view of such a point, and a data collection that can automatically switch between a DTMF signal mode and a modem communication mode, which eliminates the above-mentioned disadvantages of the prior art. An object of the present invention is to provide a transmission method of a distribution terminal.

[0006]

SUMMARY OF THE INVENTION A data terminal connected via a telephone line network and capable of transmitting and receiving DTMF signals and capable of transmitting data via a modem performs data transmission and reception using DTMF signals after line connection. When switching to a modem, a predetermined signal is transmitted to transfer to a data transmission / reception mode in the modem. D from modem communication mode
When switching to the TMF signal mode, a predetermined data pattern is transmitted, and the mode is transferred to the DTMF signal mode.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In order to solve the above-mentioned problems, a data collection / delivery terminal transmission system of the present invention is a data collection / delivery terminal transmission system between a host computer connected to a telephone line and a data terminal. A command for switching to the modem communication mode from the calling terminal performing data communication in the signal mode is transmitted to the called terminal with a predetermined tone signal, and the mode is switched from the DTMF signal mode to the modem communication mode, and data communication is performed in the modem communication mode. Sending a command to switch to the DTMF signal mode from the calling terminal in a predetermined data pattern to the called terminal to switch from the modem communication mode to the DTMF signal mode and automatically switch between the DTMF signal mode and the modem communication mode. It has features.

[0008]

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a message sequence diagram of a transmission method of a data collection and distribution terminal according to one embodiment of the present invention. As an example, it is assumed that the calling terminal is a notification device having a sensor, and the called terminal is connected to a host computer. A. When updating master data (1) The calling terminal dials and connects the line, and the called terminal switches to DTMF reception and waits for a signal. After the line is connected, it operates in the DTMF mode. (2) First, a code for identifying the calling terminal is transmitted from the calling terminal. Data is surrounded by “*” and “*”. That is, the calling terminal transmits the terminal ID signal “* 1234567”.
(*) To make the called terminal (host computer) identify the calling terminal (3) The called terminal sends an enable signal "**" (4) The calling terminal sends the modem switching command "#"####", and the called terminal switches to the modem and sends out a carrier signal. (5) The calling terminal switches to the modem to enter the carrier receiving state and is connected to the modem. (6) The calling terminal -Data "STX DATA ETX" at the called terminal
Transmission and reception.

B. In the case of sensor alert (7) The calling terminal sends the DTMF switching command “STX ######
# ETX ”to make a DTMF connection, and the called terminal
Switch to F reception and transmit the signal. The called terminal is DTMF
Put in the reception waiting state. (8) The called terminal sends out the permission signal “**”. (9) The called terminal transmits sensor information “* 55555 *”. (10) The called terminal sends out the permission signal “**”. (11) The calling terminal transmits a modem switching command “######”, and the called terminal switches to the modem and transmits a carrier signal. (12) The calling terminal switches to the modem, enters the carrier receiving state, and is connected to the modem. (13) Data "STX DATA ETX" at calling terminal-called terminal
Transmission and reception. (14) Line release

FIG. 2 is a block diagram of a calling terminal and a called terminal for implementing the present invention. In the figure, 10
Is a calling terminal as a data terminal such as a notification device, 11 is a CPU that controls the entire calling terminal 10, 12 is a ROM that stores programs and the like, 13 is a RAM that stores data and the like,
14 is a modem, DTMP transmission unit, 15 is a modem DTMP
A switch unit for switching between the transmission unit switch unit 14 and the DTMF receiver 17, 16 is an NCU of the network control unit,
Reference numeral 8 denotes an IO port of the sensors 19 to 21.

Reference numeral 30 denotes a call receiving device connected to the host computer 40; 31 denotes a CPU for controlling the entire CPU call receiving device 30; 32 denotes a ROM for storing programs and the like;
3 is a RAM for storing data and the like, 34 is a modem, DTM
The P transmission unit 35 is connected to the modem DTMP transmission unit 34 and the DTMF
Switch section for switching receiver 37, 36 is NC
U and 38 are serial input output SIO, 5
0 is a telephone line. The program as a means for "switching automatically from the modem communication mode to the DTMF signal mode" in the transmission mode of the data collection and distribution terminal of the present invention is usually the same as the program in the conventional transmission mode of the data collection and distribution terminal. Are stored in the ROM 12 of the calling terminal 10 and the ROM 32 of the called terminal 30.

[0012]

As described above, according to the transmission method of the data collection and distribution terminal of the present invention, a command for switching from the calling terminal performing data communication in the DTMF signal mode to the modem communication mode is received by a predetermined tone signal. Send to call terminal and D
A command for switching from the TMF signal mode to the modem communication mode and switching from the calling terminal performing data communication in the modem communication mode to the DTMF signal mode is transmitted to the called terminal in a predetermined data pattern, and the mode is changed from the modem communication mode to the D mode.
Switching to TMF signal mode, and automatically switching between DTMF signal mode and modem communication mode.
The F signal mode and the modem communication mode can be automatically switched between each other within the connection, and when a signal that needs an urgent signal during modem communication must be sent as a DTMF signal, it can be transmitted instantaneously.

[Brief description of the drawings]

FIG. 1 is a message sequence diagram of a transmission method of a data collection and distribution terminal according to one embodiment of the present invention.

FIG. 2 is a block diagram of a calling terminal and a called terminal for implementing the present invention.

FIG. 3 is a message sequence diagram of a transmission method of a data collection and distribution terminal in a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Calling terminal 11 CPU 12 ROM 13 RAM 14 Modem DTMP transmission part 15 Switch part 16 NCU 17 DTMF receiver 18 IO port 19 Sensor 20 Sensor 21 Sensor 30 Calling device 31 CPU 32 ROM 33 RAM 34 Modem DTMP transmission part 35 Switch part 36 NCU 37 DTMF receiver 38 SIO 40 Host computer 50 Telephone line

Claims (1)

[Claims] In a transmission system of a data collection / delivery terminal between a host computer connected to a telephone line and a data terminal, a command for switching from a calling terminal performing data communication in a DTMF signal mode to a modem communication mode is provided. The tone signal is sent to the called terminal to switch from the DTMF signal mode to the modem communication mode, and a command to switch from the calling terminal performing data communication in the modem communication mode to the DTMF signal mode to the called terminal in a predetermined data pattern. A transmission method for a data collection and distribution terminal, comprising: transmitting and switching from a modem communication mode to a DTMF signal mode; and automatically switching between the DTMF signal mode and the modem communication mode.