JPS5784651A - Transmission line monitoring system - Google Patents

Transmission line monitoring system

Info

Publication number
JPS5784651A
JPS5784651A JP16029480A JP16029480A JPS5784651A JP S5784651 A JPS5784651 A JP S5784651A JP 16029480 A JP16029480 A JP 16029480A JP 16029480 A JP16029480 A JP 16029480A JP S5784651 A JPS5784651 A JP S5784651A
Authority
JP
Japan
Prior art keywords
transmission line
frequency
pseudo noise
signal
relay
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
JP16029480A
Other languages
Japanese (ja)
Other versions
JPS5944829B2 (en
Inventor
Yoshio Nomura
Nobuyuki Tokura
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 Telegraph and Telephone Corp
Original Assignee
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 Nippon Telegraph and Telephone Corp filed Critical Nippon Telegraph and Telephone Corp
Priority to JP55160294A priority Critical patent/JPS5944829B2/en
Publication of JPS5784651A publication Critical patent/JPS5784651A/en
Publication of JPS5944829B2 publication Critical patent/JPS5944829B2/en
Expired 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)
  • Optical Communication System (AREA)

Abstract

PURPOSE:To detect a failed point with accuracy less than the interval of relay devices, by setting a switching frequency of pseudo noise series to a predetermined frequency for a relay device at a terminal station, changing the delay time and monitoring the correlation processing information transmitted from a failure information transmission line with an indicating meter. CONSTITUTION:A code generator 11 is provided at a transmission section and output of a clock pulse generator 12 is frequency-divided at a frequency-divider 13 and given to a pseudo noise generator 14. A pseudo noise series PN1 is also supplied to a frequency divider 16, the switch 17 is controlled with the output, and the PN1 is switched with a PN2 of a delay device 15. A signal of an input terminal 18 is supplied to a relay device 4 through a signal transmission cable 31 of a transmission line 21, and via a terminal I1. The signal is transmitted to a terminal station 12 through a coupler 22 in a correlation reception section 21 and relay amplifier 19, and cable 32 of the transmission line 22 in the relay device 4.
JP55160294A 1980-11-14 1980-11-14 Transmission path monitoring method Expired JPS5944829B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55160294A JPS5944829B2 (en) 1980-11-14 1980-11-14 Transmission path monitoring method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55160294A JPS5944829B2 (en) 1980-11-14 1980-11-14 Transmission path monitoring method

Publications (2)

Publication Number Publication Date
JPS5784651A true JPS5784651A (en) 1982-05-27
JPS5944829B2 JPS5944829B2 (en) 1984-11-01

Family

ID=15711857

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55160294A Expired JPS5944829B2 (en) 1980-11-14 1980-11-14 Transmission path monitoring method

Country Status (1)

Country Link
JP (1) JPS5944829B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05344067A (en) * 1992-06-10 1993-12-24 Kokusai Denshin Denwa Co Ltd <Kdd> Monitor method for optical relay system and loopback circuit and transmission reception circuit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05344067A (en) * 1992-06-10 1993-12-24 Kokusai Denshin Denwa Co Ltd <Kdd> Monitor method for optical relay system and loopback circuit and transmission reception circuit

Also Published As

Publication number Publication date
JPS5944829B2 (en) 1984-11-01

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