JPS5755642A - Branch circuit communication system - Google Patents

Branch circuit communication system

Info

Publication number
JPS5755642A
JPS5755642A JP55132025A JP13202580A JPS5755642A JP S5755642 A JPS5755642 A JP S5755642A JP 55132025 A JP55132025 A JP 55132025A JP 13202580 A JP13202580 A JP 13202580A JP S5755642 A JPS5755642 A JP S5755642A
Authority
JP
Japan
Prior art keywords
equipment
answer
signals
requesting
receiving
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.)
Granted
Application number
JP55132025A
Other languages
Japanese (ja)
Other versions
JPS6239864B2 (en
Inventor
Hajime Miyazawa
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.)
NEC Corp
Original Assignee
NEC Corp
Nippon Electric 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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP55132025A priority Critical patent/JPS5755642A/en
Publication of JPS5755642A publication Critical patent/JPS5755642A/en
Publication of JPS6239864B2 publication Critical patent/JPS6239864B2/ja
Granted 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
    • H04L12/02—Details
    • H04L12/16—Arrangements for providing special services to substations
    • H04L12/18—Arrangements for providing special services to substations for broadcast or conference, e.g. multicast
    • H04L12/1863—Arrangements for providing special services to substations for broadcast or conference, e.g. multicast comprising mechanisms for improved reliability, e.g. status reports
    • H04L12/1868—Measures taken after transmission, e.g. acknowledgments

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Time-Division Multiplex Systems (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)
  • Small-Scale Networks (AREA)

Abstract

PURPOSE:To shorten the response time of each terminal by sending a control signal, requesting a confirmation answer, to respective terminals at the same time, by performing by receiving answers by characteristic frequency signals from respective rerminal equipment, and by transmitting a transmission end signal and then receiving answers from the respective terminals. CONSTITUTION:A switching device 10 transmits control information, requesting a confirmation answer, from a control information transmission part 14 to terminal equipment A and B. On receiving the information, the equipment A and B transmit characteristic frequency signals to the device 10 as confirmation answer signals. Then, the device, once detecting those answer singals by frequency detectors 13a and 13b respectively, performs multiple-address frame transmission. Then, the device 10 informs the equipment A and B of the completion of the multiple-address frame transmission and receives the characteristic answer signals from the equipment A and B to complete the communication.
JP55132025A 1980-09-22 1980-09-22 Branch circuit communication system Granted JPS5755642A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55132025A JPS5755642A (en) 1980-09-22 1980-09-22 Branch circuit communication system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55132025A JPS5755642A (en) 1980-09-22 1980-09-22 Branch circuit communication system

Publications (2)

Publication Number Publication Date
JPS5755642A true JPS5755642A (en) 1982-04-02
JPS6239864B2 JPS6239864B2 (en) 1987-08-25

Family

ID=15071742

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55132025A Granted JPS5755642A (en) 1980-09-22 1980-09-22 Branch circuit communication system

Country Status (1)

Country Link
JP (1) JPS5755642A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6059847A (en) * 1983-09-12 1985-04-06 Nippon Telegr & Teleph Corp <Ntt> Multiple address communication confirming system
JP2006270447A (en) * 2005-03-23 2006-10-05 Canon Inc Broadcast communication system and method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6059847A (en) * 1983-09-12 1985-04-06 Nippon Telegr & Teleph Corp <Ntt> Multiple address communication confirming system
JP2006270447A (en) * 2005-03-23 2006-10-05 Canon Inc Broadcast communication system and method

Also Published As

Publication number Publication date
JPS6239864B2 (en) 1987-08-25

Similar Documents

Publication Publication Date Title
US3946315A (en) Single frequency signalling in a radiotelephone communication system with idle condition signal generator at one terminal activated by another terminal
JPS57152242A (en) Mobile communication control system
JPS6439845A (en) Data transmission equipment
JPS56114450A (en) Signal transmission system
JPS56112156A (en) Loop communication system
ATE10996T1 (en) RADIO EQUIPMENT.
DE3462651D1 (en) Switching system
JPS5744342A (en) Information collection system
DE3061939D1 (en) Method for locating troubles on a communication line without using addresses
JPS53131706A (en) Automatic telephone exchange system
JPS57106289A (en) Abnormality corresponding method on catv system
JPS5799858A (en) Public terminal communication system
JPS56157170A (en) Terminal answer signal system of data transmission system
JPS562765A (en) Unidirectional multiple address communication system
JPS56110323A (en) Branching device
JPS5758439A (en) Data transmission device
JPS57135551A (en) Contention type multidrop connection system
JPS56143739A (en) Data remote monitoring system
JPS56157169A (en) Called subscriber answering system of data transmission system
JPS5698988A (en) Switching control system
JPS56149831A (en) Duplex line switching unit
JPS56149143A (en) Circuit quality monitor system
JPS57138240A (en) Hairpin network
JPS5379407A (en) Terminal equipment for serites type interface
JPS5723349A (en) Information transmitting circuit changeover device