JPS57129052A - Remote formation system of loop - Google Patents

Remote formation system of loop

Info

Publication number
JPS57129052A
JPS57129052A JP56012880A JP1288081A JPS57129052A JP S57129052 A JPS57129052 A JP S57129052A JP 56012880 A JP56012880 A JP 56012880A JP 1288081 A JP1288081 A JP 1288081A JP S57129052 A JPS57129052 A JP S57129052A
Authority
JP
Japan
Prior art keywords
wires
pair
loop
polarity
voltage
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
JP56012880A
Other languages
Japanese (ja)
Other versions
JPS6257135B2 (en
Inventor
Tetsuo Nojima
Tsuneo Kinoshita
Masaharu Shimada
Yukio Ueda
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 JP56012880A priority Critical patent/JPS57129052A/en
Publication of JPS57129052A publication Critical patent/JPS57129052A/en
Publication of JPS6257135B2 publication Critical patent/JPS6257135B2/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
    • H04L12/28—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)
  • Data Exchanges In Wide-Area Networks (AREA)
  • Maintenance And Management Of Digital Transmission (AREA)

Abstract

PURPOSE:To form a loop by a remote control, by superposing DC voltage of positive and negative polarity on a pair of outgoing direction wires and a pair of incoming direction wires, respectively, from the side of an intra-office device, and operating a loop forming means of the side of a circuit terminating equipment. CONSTITUTION:An intra-office device 10 and a circuit terminal device 20 are connected by 2 pairs of wires 14-S, 14-R. For instance, in case a command IL4 has been generated in order to form a loop by this pair of wires, a relay 35-1 is energized, a switching circuit 34-1 is turned on, and DC voltage of positive polarity is superposed on the pair of wires 14-S through a line 36-S by an electric power supply 33-1. Also, when a command IL2 for forming a loop by the circuit terminal device 20 has been generated, DC voltage of negative polarity is superposed on the pair of wires 14-S. The polarity of this pair f wires is discriminated by polarity discriminating means 37-1, 37-2, and by a result of discrimination, loop forming means 31, 32 are selected and driven.
JP56012880A 1981-02-02 1981-02-02 Remote formation system of loop Granted JPS57129052A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56012880A JPS57129052A (en) 1981-02-02 1981-02-02 Remote formation system of loop

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56012880A JPS57129052A (en) 1981-02-02 1981-02-02 Remote formation system of loop

Publications (2)

Publication Number Publication Date
JPS57129052A true JPS57129052A (en) 1982-08-10
JPS6257135B2 JPS6257135B2 (en) 1987-11-30

Family

ID=11817719

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56012880A Granted JPS57129052A (en) 1981-02-02 1981-02-02 Remote formation system of loop

Country Status (1)

Country Link
JP (1) JPS57129052A (en)

Also Published As

Publication number Publication date
JPS6257135B2 (en) 1987-11-30

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