JPS5769946A - Failure monitor system - Google Patents

Failure monitor system

Info

Publication number
JPS5769946A
JPS5769946A JP14623480A JP14623480A JPS5769946A JP S5769946 A JPS5769946 A JP S5769946A JP 14623480 A JP14623480 A JP 14623480A JP 14623480 A JP14623480 A JP 14623480A JP S5769946 A JPS5769946 A JP S5769946A
Authority
JP
Japan
Prior art keywords
virtual random
random pulse
circuit
signal
generating circuit
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
JP14623480A
Other languages
Japanese (ja)
Other versions
JPS6130778B2 (en
Inventor
Takashi Toge
Hiroo Kitasagami
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 JP14623480A priority Critical patent/JPS5769946A/en
Publication of JPS5769946A publication Critical patent/JPS5769946A/en
Publication of JPS6130778B2 publication Critical patent/JPS6130778B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/40—Monitoring; Testing of relay systems

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Dc Digital Transmission (AREA)
  • Monitoring And Testing Of Transmission In General (AREA)

Abstract

PURPOSE:To enable failure retrieval with a state close to actual signal transmission, by forming a pattern signal through the switching of virtual random pulses with different make ratio alternately, and forming a test signal from this pattern signal. CONSTITUTION:A virtual random pulse generating circuit (PN generating circuit) 9 is a circuit producing a virtual random pulse with smaller mark rate, and a PN generating circuit 11 is a circuit generating virtual random pulse with greater mark rate. Both the circuits modulate virtual random pulse in synchronizing with a basic reference clock frequency f0 of each relay line with a different frequency fR at each relay device. That is, frequencies fR=fR1, fR2... are assigned corresponding to relay devices 71, 72... and for example, if signal folding is made at the relay device 71 fR=fR1 can be applied.
JP14623480A 1980-10-21 1980-10-21 Failure monitor system Granted JPS5769946A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14623480A JPS5769946A (en) 1980-10-21 1980-10-21 Failure monitor system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14623480A JPS5769946A (en) 1980-10-21 1980-10-21 Failure monitor system

Publications (2)

Publication Number Publication Date
JPS5769946A true JPS5769946A (en) 1982-04-30
JPS6130778B2 JPS6130778B2 (en) 1986-07-16

Family

ID=15403132

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14623480A Granted JPS5769946A (en) 1980-10-21 1980-10-21 Failure monitor system

Country Status (1)

Country Link
JP (1) JPS5769946A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58215829A (en) * 1982-06-09 1983-12-15 Nec Corp Locating system of fault in repeater
JPS62236240A (en) * 1986-04-08 1987-10-16 Nec Corp Remote error rate measuring circuit
EP0620446A2 (en) * 1993-04-13 1994-10-19 Japan Radio Co., Ltd Device for testing an amplifier

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58215829A (en) * 1982-06-09 1983-12-15 Nec Corp Locating system of fault in repeater
JPS62236240A (en) * 1986-04-08 1987-10-16 Nec Corp Remote error rate measuring circuit
EP0620446A2 (en) * 1993-04-13 1994-10-19 Japan Radio Co., Ltd Device for testing an amplifier
EP0620446B1 (en) * 1993-04-13 2003-07-02 Japan Radio Co., Ltd Device for testing an amplifier

Also Published As

Publication number Publication date
JPS6130778B2 (en) 1986-07-16

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