JPS5781749A - Fault searching system for digital transmission repeating system - Google Patents

Fault searching system for digital transmission repeating system

Info

Publication number
JPS5781749A
JPS5781749A JP15846280A JP15846280A JPS5781749A JP S5781749 A JPS5781749 A JP S5781749A JP 15846280 A JP15846280 A JP 15846280A JP 15846280 A JP15846280 A JP 15846280A JP S5781749 A JPS5781749 A JP S5781749A
Authority
JP
Japan
Prior art keywords
series
code series
code
output
marks
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
JP15846280A
Other languages
Japanese (ja)
Other versions
JPS6144429B2 (en
Inventor
Tokuhiro Kitami
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 JP15846280A priority Critical patent/JPS5781749A/en
Publication of JPS5781749A publication Critical patent/JPS5781749A/en
Publication of JPS6144429B2 publication Critical patent/JPS6144429B2/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)

Abstract

PURPOSE:To simplify the constitution of a repeater and at the same time to increase the accuracy for the search of a fault, by setting the number of the marks even, within a block corresponding to a pseudo random pattern among the CMI (coded mark inversion) code series and performing an operation between the number of marks and a pulse that designates the repeating point. CONSTITUTION:An alternating switch is carried out with a switch signal SWS and through a switch circuit SW between the output PN of a generator PNP of the pseudo random code series and the output AM of a generator AMG of the all mark code series. Thus a value code series is obtained. Then the CMI conversion output series CO is produced by a CMI code converter CMICOD. Accordingly, the series CO and the signal SWS are supplied to a parity counter circut PC, and an even number is set for the marks within a block corresponding to an pseudo random pattern among the series CO. Then an exclusive OR operation is carried out to the repeating point designating pulse RAP through an exclusive OR circuit EXOR. Thus the transmission code series S is produced. Then the identification output code series DR is first obtained by a repeater, and a multinomial division DC is carried out to produce a transfer signal B via a band pass filter.
JP15846280A 1980-11-11 1980-11-11 Fault searching system for digital transmission repeating system Granted JPS5781749A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15846280A JPS5781749A (en) 1980-11-11 1980-11-11 Fault searching system for digital transmission repeating system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15846280A JPS5781749A (en) 1980-11-11 1980-11-11 Fault searching system for digital transmission repeating system

Publications (2)

Publication Number Publication Date
JPS5781749A true JPS5781749A (en) 1982-05-21
JPS6144429B2 JPS6144429B2 (en) 1986-10-02

Family

ID=15672261

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15846280A Granted JPS5781749A (en) 1980-11-11 1980-11-11 Fault searching system for digital transmission repeating system

Country Status (1)

Country Link
JP (1) JPS5781749A (en)

Also Published As

Publication number Publication date
JPS6144429B2 (en) 1986-10-02

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