JPS5596744A - Line disconnection unit - Google Patents

Line disconnection unit

Info

Publication number
JPS5596744A
JPS5596744A JP456679A JP456679A JPS5596744A JP S5596744 A JPS5596744 A JP S5596744A JP 456679 A JP456679 A JP 456679A JP 456679 A JP456679 A JP 456679A JP S5596744 A JPS5596744 A JP S5596744A
Authority
JP
Japan
Prior art keywords
code
switches
noise
detected
fixed time
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
JP456679A
Other languages
Japanese (ja)
Other versions
JPS6133418B2 (en
Inventor
Kuniyuki Nagai
Kazuhisa Hattori
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.)
Nippon Signal Co Ltd
Original Assignee
Nippon Signal 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 Nippon Signal Co Ltd filed Critical Nippon Signal Co Ltd
Priority to JP456679A priority Critical patent/JPS5596744A/en
Publication of JPS5596744A publication Critical patent/JPS5596744A/en
Publication of JPS6133418B2 publication Critical patent/JPS6133418B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/24—Testing correct operation

Abstract

PURPOSE:To omit the trouble of operations of a restoration push button by disconnecting a transmission line where noise is detected and by restoring the line automatically when continuous receiving frequency of a set normal code or receiving code non-input over a fixed time is detected. CONSTITUTION:The signal which is received by hybrid transformers H1 and H2 provided on upper or lower working line MLD or MLU is inputted to code decision circuits DT1 and DT2, and switches SW1 and SW2 are opened when the code is decided as noise. Then, switches SW1 and SW2 are restored automatically under conditions of continuous receiving frequency of a normal code, which is set in code decision circuits DT1 and DT2, or receiving code non-input over a fixed time after opening.
JP456679A 1979-01-17 1979-01-17 Line disconnection unit Granted JPS5596744A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP456679A JPS5596744A (en) 1979-01-17 1979-01-17 Line disconnection unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP456679A JPS5596744A (en) 1979-01-17 1979-01-17 Line disconnection unit

Publications (2)

Publication Number Publication Date
JPS5596744A true JPS5596744A (en) 1980-07-23
JPS6133418B2 JPS6133418B2 (en) 1986-08-01

Family

ID=11587580

Family Applications (1)

Application Number Title Priority Date Filing Date
JP456679A Granted JPS5596744A (en) 1979-01-17 1979-01-17 Line disconnection unit

Country Status (1)

Country Link
JP (1) JPS5596744A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6143036A (en) * 1984-08-07 1986-03-01 Toshiba Corp Remote supervisory and controlling equipment
JPS62116038A (en) * 1985-11-15 1987-05-27 Toshiba Corp Remote supervisory and controlling equipment
JPS62179240A (en) * 1986-01-31 1987-08-06 Mitsubishi Cable Ind Ltd Automatic restoration method for circuit connection of converter for network
JPH04199937A (en) * 1990-11-29 1992-07-21 Hitachi Telecom Technol Ltd Constitution controller for ring-like network

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6143036A (en) * 1984-08-07 1986-03-01 Toshiba Corp Remote supervisory and controlling equipment
JPS62116038A (en) * 1985-11-15 1987-05-27 Toshiba Corp Remote supervisory and controlling equipment
JPS62179240A (en) * 1986-01-31 1987-08-06 Mitsubishi Cable Ind Ltd Automatic restoration method for circuit connection of converter for network
JPH04199937A (en) * 1990-11-29 1992-07-21 Hitachi Telecom Technol Ltd Constitution controller for ring-like network

Also Published As

Publication number Publication date
JPS6133418B2 (en) 1986-08-01

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