JPS6412745A - Main signal bypassing system - Google Patents

Main signal bypassing system

Info

Publication number
JPS6412745A
JPS6412745A JP62170095A JP17009587A JPS6412745A JP S6412745 A JPS6412745 A JP S6412745A JP 62170095 A JP62170095 A JP 62170095A JP 17009587 A JP17009587 A JP 17009587A JP S6412745 A JPS6412745 A JP S6412745A
Authority
JP
Japan
Prior art keywords
power source
main signal
disconnection
relay
disconnected
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
JP62170095A
Other languages
Japanese (ja)
Inventor
Katsuhiro Tanimura
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
Original Assignee
Fujitsu 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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP62170095A priority Critical patent/JPS6412745A/en
Publication of JPS6412745A publication Critical patent/JPS6412745A/en
Pending legal-status Critical Current

Links

Landscapes

  • Communication Control (AREA)
  • Maintenance And Management Of Digital Transmission (AREA)

Abstract

PURPOSE:To pass a main signal even when a power source is disconnected, by constituting a system in such a way that a bypassing path is provided between the input of a test data inserting and branching device and a selector, and also, a power source disconnection detecting part to detect the disconnection of the power source is provided at a disconnected power source, and a bypassing side is selected at the time of detecting the disconnection of the power source at the said power source disconnection detecting part. CONSTITUTION:A delay circuit 3 is provided at the output of a test data inserting and branching circuit 2, and the bypassing path 5 is provided from a digital main signal input part, and a relay RL for detecting the disconnection of the dedicated power source 1 is provided, and the contact rl of the relay RL is provided as the selector. The system is constituted in such a way that the digital main signal can be outputted passing the bypassing path 5 when the output of the dedicated power source 1 is supplied and operated to the relay RL, and the contact rl is connected to continuous line side generally, and a digital main signal can be outputted passing the side of the test data inserting and branching circuit 2, and the dedicated power source 1 is disconnected, the relay RL is recovered, and the contact rl is connected to a dotted line side. Therefore, it is possible to pass the digital main signal without generating step out in a device at a succeeding stage even when the dedicated power source 1 is disconnected.
JP62170095A 1987-07-07 1987-07-07 Main signal bypassing system Pending JPS6412745A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62170095A JPS6412745A (en) 1987-07-07 1987-07-07 Main signal bypassing system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62170095A JPS6412745A (en) 1987-07-07 1987-07-07 Main signal bypassing system

Publications (1)

Publication Number Publication Date
JPS6412745A true JPS6412745A (en) 1989-01-17

Family

ID=15898547

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62170095A Pending JPS6412745A (en) 1987-07-07 1987-07-07 Main signal bypassing system

Country Status (1)

Country Link
JP (1) JPS6412745A (en)

Similar Documents

Publication Publication Date Title
JPS6437134A (en) Optical regenerator for locating fault in optical transmission system
JPS56153859A (en) Pcm line switching device
TW345638B (en) Control structure for a high-speed asynchronous pipeline
JPS6412745A (en) Main signal bypassing system
WO2000028335A3 (en) Connection detection circuit apparatus and method
JPS5698033A (en) Switching system of standby transmission line
JPS56114450A (en) Signal transmission system
JPS5231629A (en) Data communiction system
FR2369740A1 (en) Current surge eliminating device - has circuit with several branches, one of which connects input to output and other circuits connect output to reference potential
JPS56120233A (en) Station device for optical data
GB9218206D0 (en) Detecting faults in power lines
JPS5582341A (en) Series interface control system
JPS54139399A (en) Transmission line continuity confirming system
JPS56138394A (en) Test system of time sharing exchanger spare system
JPS57162535A (en) Detecting system of cable fault
JPS6459092A (en) Radar equipment
JPS6481540A (en) Reception signal switching device
JPS5496313A (en) Signal switching system
JPS5723349A (en) Information transmitting circuit changeover device
JPS5538758A (en) Using/spare circuit switching system for signal transmission
JPS56119514A (en) Monitor signal amplifier
JPS56104551A (en) Line switching system
JPS642334A (en) Semiconductor integrated circuit
JPS56153858A (en) Pcm line switching system
JPS57116445A (en) Optical repeater