JPS54148409A - Automatic return system for pcm transmission line - Google Patents

Automatic return system for pcm transmission line

Info

Publication number
JPS54148409A
JPS54148409A JP5656778A JP5656778A JPS54148409A JP S54148409 A JPS54148409 A JP S54148409A JP 5656778 A JP5656778 A JP 5656778A JP 5656778 A JP5656778 A JP 5656778A JP S54148409 A JPS54148409 A JP S54148409A
Authority
JP
Japan
Prior art keywords
transmission line
automatic return
monitor
triosignal
pulse
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
JP5656778A
Other languages
Japanese (ja)
Inventor
Masayuki Ohama
Yasuo Isono
Ikuo Matsuoka
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.)
Oki Electric Industry Co Ltd
Original Assignee
Oki Electric Industry 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 Oki Electric Industry Co Ltd filed Critical Oki Electric Industry Co Ltd
Priority to JP5656778A priority Critical patent/JPS54148409A/en
Publication of JPS54148409A publication Critical patent/JPS54148409A/en
Pending 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)

Abstract

PURPOSE:To secure an easy fault detection of the transmission line through a simple constitution by performing an automatic return via the test signal supplied from the monitor station. CONSTITUTION:When the transmission line is tested, the pulse triosignal is transmitted from the monitor station to be supplied to terminal repeater equipment 11 of the monitored station. And monitor signal output line 14 is connected to monitor filter 15 to carry out the fault orientation. At the same time, the low-frequency component of the pulse triosignal is detected at relay driving circuit 17 for transmission return to drive relay 18. Thus, an automatic return is given to the transmission line.
JP5656778A 1978-05-15 1978-05-15 Automatic return system for pcm transmission line Pending JPS54148409A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5656778A JPS54148409A (en) 1978-05-15 1978-05-15 Automatic return system for pcm transmission line

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5656778A JPS54148409A (en) 1978-05-15 1978-05-15 Automatic return system for pcm transmission line

Publications (1)

Publication Number Publication Date
JPS54148409A true JPS54148409A (en) 1979-11-20

Family

ID=13030704

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5656778A Pending JPS54148409A (en) 1978-05-15 1978-05-15 Automatic return system for pcm transmission line

Country Status (1)

Country Link
JP (1) JPS54148409A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4827607A (en) * 1971-08-13 1973-04-12

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4827607A (en) * 1971-08-13 1973-04-12

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