JPS55105458A - Data transmission system - Google Patents

Data transmission system

Info

Publication number
JPS55105458A
JPS55105458A JP1224679A JP1224679A JPS55105458A JP S55105458 A JPS55105458 A JP S55105458A JP 1224679 A JP1224679 A JP 1224679A JP 1224679 A JP1224679 A JP 1224679A JP S55105458 A JPS55105458 A JP S55105458A
Authority
JP
Japan
Prior art keywords
base station
transmission
sent
information
counter
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP1224679A
Other languages
Japanese (ja)
Inventor
Katsuji Murata
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Denshi KK
Original Assignee
Hitachi Denshi KK
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hitachi Denshi KK filed Critical Hitachi Denshi KK
Priority to JP1224679A priority Critical patent/JPS55105458A/en
Publication of JPS55105458A publication Critical patent/JPS55105458A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q9/00—Arrangements in telecontrol or telemetry systems for selectively calling a substation from a main station, in which substation desired apparatus is selected for applying a control signal thereto or for obtaining measured values therefrom

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Small-Scale Networks (AREA)
  • Communication Control (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

PURPOSE:To realize reduction of the power consumption for the end office unit by avoiding the unnecessary data transmission at each end office in case such system is applied in that the data are always collected at the base station in the automatic and cyclic way. CONSTITUTION:Transmission data conversion part 6 receives the information sent from the I/O through terminal 2 and then memorizes it with clearing of reception frequency counter part 5 every time to send the information to transmission control part 8 via coding part 7. Detection part 4 decides whether the self-station is called out or not in response to the polling from the base station. And in case the self- station is called, the signals are sent to parts 6 and 8, transmits the information to the base station via MODEM, and furthermore advances the contents of part 5. When the contents of part 5 reaches the set level, the signal is sent to part 8 to stop the advance thereafter. Accordingly, the transmission is carried out only for the frequency during which the value of the counter reaches the set level after the new signal from the I/O is received and then the counter is cleared.
JP1224679A 1979-02-07 1979-02-07 Data transmission system Pending JPS55105458A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1224679A JPS55105458A (en) 1979-02-07 1979-02-07 Data transmission system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1224679A JPS55105458A (en) 1979-02-07 1979-02-07 Data transmission system

Publications (1)

Publication Number Publication Date
JPS55105458A true JPS55105458A (en) 1980-08-13

Family

ID=11800002

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1224679A Pending JPS55105458A (en) 1979-02-07 1979-02-07 Data transmission system

Country Status (1)

Country Link
JP (1) JPS55105458A (en)

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