JPS57106260A - Loop transmission system - Google Patents

Loop transmission system

Info

Publication number
JPS57106260A
JPS57106260A JP55182287A JP18228780A JPS57106260A JP S57106260 A JPS57106260 A JP S57106260A JP 55182287 A JP55182287 A JP 55182287A JP 18228780 A JP18228780 A JP 18228780A JP S57106260 A JPS57106260 A JP S57106260A
Authority
JP
Japan
Prior art keywords
signal
idle pattern
transmission
primary station
station
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
JP55182287A
Other languages
Japanese (ja)
Inventor
Yosuke Honda
Takashi Suzuki
Akira Kaiyama
Tomoki Omiya
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.)
Fujitsu Ltd
Nippon Telegraph and Telephone Corp
Original Assignee
Fujitsu Ltd
Nippon Telegraph and Telephone Corp
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 Fujitsu Ltd, Nippon Telegraph and Telephone Corp filed Critical Fujitsu Ltd
Priority to JP55182287A priority Critical patent/JPS57106260A/en
Publication of JPS57106260A publication Critical patent/JPS57106260A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/42—Loop networks

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Communication Control (AREA)
  • Small-Scale Networks (AREA)

Abstract

PURPOSE:To reduce the load of a primary station to simplify the processing for transmission, by converting the transmission signal of the primary station to an idle pattern before leading this signal into the primary station when this signal is returned to the primary station. CONSTITUTION:When a primary station 1 transmits a polling signal by the command from a CPU4, an idle pattern and the transmission signal are supplied to secondary stations 21-23 through a loop transmission line and are taken into prescribed secondary stations corresponding to addresses and are returned to the station 1 through the transmission line. Then, a timer 5 is operated at the transmission start time in the station 1 to switch a switch 6 to the side of an idle pattern generating circuit 7 for a constant time. Thus, the receiving circuit of an LSI 3 is disconnected from the transmission line, and the idle pattern from the circuit 7 is supplied to the receiving circuit. Consequently, the signal returned to stations 21-23 is converted to the idle pattern equivalently.
JP55182287A 1980-12-23 1980-12-23 Loop transmission system Pending JPS57106260A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55182287A JPS57106260A (en) 1980-12-23 1980-12-23 Loop transmission system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55182287A JPS57106260A (en) 1980-12-23 1980-12-23 Loop transmission system

Publications (1)

Publication Number Publication Date
JPS57106260A true JPS57106260A (en) 1982-07-02

Family

ID=16115634

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55182287A Pending JPS57106260A (en) 1980-12-23 1980-12-23 Loop transmission system

Country Status (1)

Country Link
JP (1) JPS57106260A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7039051B2 (en) 1999-08-18 2006-05-02 Fujitsu Limited Data sending system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7039051B2 (en) 1999-08-18 2006-05-02 Fujitsu Limited Data sending system

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