JPS57166758A - Signal collision detecting system - Google Patents

Signal collision detecting system

Info

Publication number
JPS57166758A
JPS57166758A JP56052089A JP5208981A JPS57166758A JP S57166758 A JPS57166758 A JP S57166758A JP 56052089 A JP56052089 A JP 56052089A JP 5208981 A JP5208981 A JP 5208981A JP S57166758 A JPS57166758 A JP S57166758A
Authority
JP
Japan
Prior art keywords
output
receiver
signal
signal collision
adjustment
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
JP56052089A
Other languages
Japanese (ja)
Inventor
Shuichi Oota
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.)
Ricoh Co Ltd
Original Assignee
Ricoh Co Ltd
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 Ricoh Co Ltd filed Critical Ricoh Co Ltd
Priority to JP56052089A priority Critical patent/JPS57166758A/en
Publication of JPS57166758A publication Critical patent/JPS57166758A/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]
    • H04L12/40—Bus networks
    • H04L12/407—Bus networks with decentralised control
    • H04L12/413—Bus networks with decentralised control with random access, e.g. carrier-sense multiple-access with collision detection [CSMA-CD]

Landscapes

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

Abstract

PURPOSE:To adjust a bridging circuit for detecting signal collision by generating a signal to a local office after confirming that a communication medium is in a silent state. CONSTITUTION:A controlling device 17 checks the output of a receiver 12 at first. If an output is not generated from the receiver 12, it is discriminated that a communication line 11 is not used by any transmitting/receiving device. Under the condition, the controlling device 17 sends a packet to the local office. A variable resistance 16 is adjusted so that the detected output of an output from the receiver 12 by the said signal closes to ''0''. After completing the adjustment, the variable resistance 16 is kept under the status until the succeeding adjustment is performed. Thus, a coupling resistance 15b with comparatively similar resistance value can be used.
JP56052089A 1981-04-07 1981-04-07 Signal collision detecting system Pending JPS57166758A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56052089A JPS57166758A (en) 1981-04-07 1981-04-07 Signal collision detecting system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56052089A JPS57166758A (en) 1981-04-07 1981-04-07 Signal collision detecting system

Publications (1)

Publication Number Publication Date
JPS57166758A true JPS57166758A (en) 1982-10-14

Family

ID=12905095

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56052089A Pending JPS57166758A (en) 1981-04-07 1981-04-07 Signal collision detecting system

Country Status (1)

Country Link
JP (1) JPS57166758A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0453330A (en) * 1990-06-21 1992-02-20 N T T Data Tsushin Kk Two-wire inter range information communication network
JPH0726255B2 (en) * 1985-12-13 1995-03-22 エス・セー・アー・プルプ・アクテイエボラーグ Equipment for dry forming of webs

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0726255B2 (en) * 1985-12-13 1995-03-22 エス・セー・アー・プルプ・アクテイエボラーグ Equipment for dry forming of webs
JPH0453330A (en) * 1990-06-21 1992-02-20 N T T Data Tsushin Kk Two-wire inter range information communication network
JPH0720112B2 (en) * 1990-06-21 1995-03-06 エヌ・ティ・ティ・データ通信株式会社 2-wire area information and communication network

Similar Documents

Publication Publication Date Title
JPS6477339A (en) Collision detecting type lan terminal interface module
JPS56149148A (en) Signal transmission system
JPS57166758A (en) Signal collision detecting system
JPS56157153A (en) Data repeating device
JPS57190436A (en) Adjusting method for optical transmitting line
JPS57148459A (en) Facsimile transmitter
JPS57173245A (en) Data transmission system
JPS5735457A (en) Loudspeaker telephone set system
JPS56161750A (en) Synchronizing system in telephone set
JPS5466009A (en) Detection system for circuit fault of two-wire communication device
JPS57148452A (en) Control system for transmitting and receiving line of hand-free telephone set
JPS5713826A (en) Automatic equalization system of modulator and demodulator
JPS5797753A (en) Loop digital data highway device
JPS5739646A (en) Interruption controlling system during communication
JPS573447A (en) Time division multidimension connecting device
JPS57160269A (en) Facsimile device
JPS5781746A (en) Control system of data transmission in loop transmission system
JPS567063A (en) Detecting method for signal line short-circuited spot
JPS564952A (en) Transmission system for vehicle sensing signal
JPS57132455A (en) Communication controlling system
JPS577654A (en) Connection test system for circuit and terminal
JPS5799069A (en) Call display device in transfer telephone
JPS57157673A (en) Simultaneous transmission system for information of voice and other format
JPS553257A (en) Facsimile transmission control system
JPS5628530A (en) Terminal equipment in two-way data communication system having transmission signal level automatic control mechanism