JPS5767357A - Monitor system of error rate of digital relay transmission - Google Patents

Monitor system of error rate of digital relay transmission

Info

Publication number
JPS5767357A
JPS5767357A JP14399180A JP14399180A JPS5767357A JP S5767357 A JPS5767357 A JP S5767357A JP 14399180 A JP14399180 A JP 14399180A JP 14399180 A JP14399180 A JP 14399180A JP S5767357 A JPS5767357 A JP S5767357A
Authority
JP
Japan
Prior art keywords
signal
parity bit
error rate
output
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.)
Pending
Application number
JP14399180A
Other languages
Japanese (ja)
Inventor
Masami Kato
Masahiko Matsushita
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.)
NTT Inc
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 JP14399180A priority Critical patent/JPS5767357A/en
Publication of JPS5767357A publication Critical patent/JPS5767357A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/24—Testing correct operation

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Detection And Prevention Of Errors In Transmission (AREA)
  • Dc Digital Transmission (AREA)

Abstract

PURPOSE:To detect the error rate efficiently, by adding the parity bit to the communication signal being used and by monitoring the error rate of the relax transmission path by using for communication. CONSTITUTION:Clock detected from the signal of a terminal 6 is frequency divided by a frequency division circuit 15. Even parity bit is generated at each block in an even parity circuit 16, and in a frequency division circuit 17, odd parity bit is generated. In an insertion circuit 14, parity bit is added to the transmission code. The output is transmitted to the relay transmission path and sent to the whole or a portion of a relay 4. Pulse train of the repeated digital signal is frequency divided into 1/2 and a signal having twice the period of time interval gamma is extracted by using LPF of the output. Output of this LPF is transmitted to the monitor station installed on transmission statin or receiving station, and in this place, phase fluctuation of signal component of the period of twice the time interval gamma is monitored.
JP14399180A 1980-10-15 1980-10-15 Monitor system of error rate of digital relay transmission Pending JPS5767357A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14399180A JPS5767357A (en) 1980-10-15 1980-10-15 Monitor system of error rate of digital relay transmission

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14399180A JPS5767357A (en) 1980-10-15 1980-10-15 Monitor system of error rate of digital relay transmission

Publications (1)

Publication Number Publication Date
JPS5767357A true JPS5767357A (en) 1982-04-23

Family

ID=15351759

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14399180A Pending JPS5767357A (en) 1980-10-15 1980-10-15 Monitor system of error rate of digital relay transmission

Country Status (1)

Country Link
JP (1) JPS5767357A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6489635A (en) * 1987-09-30 1989-04-04 Nec Corp System for supervizing line quality

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6489635A (en) * 1987-09-30 1989-04-04 Nec Corp System for supervizing line quality

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