JPS6019698B2 - Data transmission method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a data transmission system for collecting information from a slave station to a master station, and particularly to a data transmission system used for both telephone and data transmission.

Conventionally, when data transmission and telephone calls are shared on one transmission line, so-called multiplexed simultaneous calls have been mainly used, in which the frequencies of the audio bands for data transmission and telephone calls are arranged so as not to overlap with each other. This requires expensive multiplexing equipment for the master station and slave stations, or the frequency used for data transmission is limited. A shared system has not yet been established.An object of the present invention is to provide a data transmission system that allows telephones to be easily switched and used using a normal data transmission device, and that gives priority to data transmission.

In a data transmission system that collects information on a slave station by normal boring, the present invention notifies the master station that it has hooked up a telephone, and when the slave station hooks up a telephone, it sends a response signal to the data transmission. The device is characterized in that data transmission and a telephone can be used interchangeably by including hook-up information in the terminal and notifying the master station of hook-up. The present invention will be explained in more detail below according to embodiments shown in the drawings.

FIG. 1 shows a block diagram of an embodiment of a data transmission system according to the present invention. 001 and 101 are leased line telephones, which have a speaker for calling the other party and a hook switch contact for hook-up information in addition to a handset for making calls, and 002 and 102 are for connecting the telephone to the line. IJ Ray for connection, 003 is the control signal transmission unit to the slave station when the phone is hooked up on the master station side, 0
04 is a normal bowling slave station activation signal transmitter, 00
5 is a clock pulse oscillator that outputs pulses at regular intervals; 0
06 is a temporary recording part of the telephone hook-up signal on the slave station side included in the answer signal, 007 is a receiving part of the answer signal of the slave station,
008 is a decoder section for the answer signal, and 009 is a display section for displaying the contents of the answer signal.

Further, 103 is a receiving section for receiving a control signal from a control signal from the master station, 104 is a receiving section for receiving a slave station activation signal, 105 is a temporary storage section for the received signal, 106 is a clock pulse oscillator that outputs pulses at regular intervals, and 107 is a receiving section for receiving a control signal from the master station. , input signal scanning unit, 10
Reference numeral 8 denotes an external input unit that receives input signals such as data and telephone hook-up from the outside; 109 a coder and transmitter driver unit that encodes external input signals and drives the transmitter unit; and 110, a slave station response signal transmission unit. A section 111 indicates a control signal storage section that receives a control signal from the master station and stores it to control the relay. Now, both the master station and slave station have phones 0.
Normally, when 01 and 101 are not hooked up, the activation signal transmitter 004 is driven by a pulse from the clock pulse oscillator 005 on the master station side, and a slave station activation signal is output to the line.

On the slave station side, the activation signal from the master station is received by the activation signal receiving section 104.
When received, it is stored in the temporary storage unit 105, and the pulse from the clock pulse oscillator 106 is input to the scanning unit 107. The data and hook-up information are read by the scanning unit 107 using the external input unit 108, coded by the coder and transmitter driver unit 109, and activated by the transmitting unit 110, which is output to the line as a reply signal to the master station. In the master station, a receiving section 007 receives a response signal from a slave station, a decoder section 008 decodes the response signal, and a display section 009 displays the response contents. If the master station phone 001 is hooked up, the bowling start signal is stopped by the output signal linked with the hook switch of the phone 001, and the control signal transmitter 003 is activated by the pulse from the clock pulse oscillator 005 to send a control signal to the slave station. Send. When the slave station receives a control signal from the master station, it stores it in the control signal storage unit 111, connects the telephone 101 to the line via the relay 102, and at the same time transmits data and the hook-up signal of the slave telephone 101 to the data and the hook-up signal of the slave telephone 101 by the pulse of the clock pulse oscillator 106. ” is mistrusted to the parent station. By connecting the telephone 101 to the line, a speaker circuit for amplifying the ringing tone from the other party is connected to the line. The master station receives the reply signal from the slave station and decodes it in the decoder unit O08, and the data is displayed on the display unit 009. At the same time, the hook-up signal is stored in the slave station hook-up storage unit 006, and then the master station A side telephone 001 is connected to the line by a relay 002. Next, the super caller who has hooked up the main station phone 001 transmits his voice through the transmitter, activates the ring tone sending circuit built in the main station, and calls the other party through the speaker of the slave station phone 101. Make a call. When the master station hooks on the telephone 001, the hook-up signal from the master telephone 001 is released and normal operation is restored. Further, when the telephone 101 is hooked up on the slave station side, the hook-up information in the normal boring answer signal is returned as "present" and the slave telephone 101 is connected to the line.

The master station receives the reply signal, decodes it in the decoder section 008, and displays the data on the display section 009. At the same time,
The hookup signal is stored in the slave station hookup storage section 006, and the master station telephone 001 is connected to the line. Next, in the same manner as before, the caller of the slave station calls the other party through the speaker of telephone 001 of the master station and makes a conversation. When the master station hooks on, normal operation is restored. Furthermore, if a change in data status occurs at the slave station during a call and an emergency is required, the slave station telephone 101 is disconnected from the line, an alarm signal is sent to the master station, and when the master station also receives an alarm signal, telephone 001 is disconnected from the line. It is also possible to forcibly disconnect and restore normal operation to give priority to data transmission over telephone calls. As mentioned above, the addition of a control signal sending function by hooking up the master station's telephone to the normal boring operation,
By simply including the hook-up information of the slave station's telephone in the slave station's boring reply signal, data transmission and telephone sharing are possible regardless of the frequency band used, and various measurement devices using dedicated lines are enabled. This is very effective when you want to switch between telephones in a monitoring device or the like.

FIG. 2 shows an operation time chart as an embodiment of data transmission according to the present invention.

These operations are as explained based on FIG.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an embodiment of the data transmission system according to the present invention, and FIG. 2 is a time chart for explaining its operation. In the figure, 001 and 101 are leased line telephones, 002 and 1
02 is a relay, 003 is a control signal transmission unit to a slave station, 00
4 is a slave station activation signal transmitter, 005 is a clock pulse oscillator, 006 is a hook-up signal temporary storage unit, 007 is a response signal receiver, 008 is a response signal decoder,
009 is a display section for displaying the contents of the reply signal, 103 is a control signal receiving section, 104 is a starting signal receiving section, 105 is a temporary storage section for the received signal, 106 is a clock pulse oscillator, 107
108 is an input signal scanning section, 108 is an external input section, 109 is a coder and transmitter driver section, 110 is a reply signal transmitting section, and 111 is a control signal storage section. Figure 2 Rudder

Claims (1)

[Claims] 1 In addition to data transmission through boring operations using a dedicated line, there is also a circuit that detects the hook-up information of the master station telephone and sends a control signal, and a circuit that detects the hook-up information of the master station telephone and sends a control signal, and the slave station telephone hook-up included in the reply signal from the slave station. In addition to the base station, which includes a temporary memory circuit that receives and temporarily stores information, and a circuit that connects the base station dedicated telephone to the dedicated line using the output of the temporary memory circuit, and a regular communication circuit for bowling, a receiving circuit that receives a control signal from the station; a temporary storage circuit that temporarily stores the received control signal; a circuit that connects the slave station dedicated telephone to the dedicated line using an output from the storage circuit; A data transmission system that includes a slave station equipped with an input circuit that detects hook-up information from a local telephone and includes it in a response signal.