JPS5787264A - Line monitoring system for high-level transmission control procedure - Google Patents

Line monitoring system for high-level transmission control procedure

Info

Publication number
JPS5787264A
JPS5787264A JP55163040A JP16304080A JPS5787264A JP S5787264 A JPS5787264 A JP S5787264A JP 55163040 A JP55163040 A JP 55163040A JP 16304080 A JP16304080 A JP 16304080A JP S5787264 A JPS5787264 A JP S5787264A
Authority
JP
Japan
Prior art keywords
signal
receiving
transmitting
modulating
demodulating
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
JP55163040A
Other languages
Japanese (ja)
Other versions
JPS6053975B2 (en
Inventor
Toru Ogawa
Tomohiro Mori
Nobuo Nezu
Tomo Nagao
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
KDDI Corp
Original Assignee
Fujitsu Ltd
Kokusai Denshin Denwa KK
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, Kokusai Denshin Denwa KK filed Critical Fujitsu Ltd
Priority to JP55163040A priority Critical patent/JPS6053975B2/en
Publication of JPS5787264A publication Critical patent/JPS5787264A/en
Publication of JPS6053975B2 publication Critical patent/JPS6053975B2/en
Expired 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
    • H04L1/20—Arrangements for detecting or preventing errors in the information received using signal quality detector

Landscapes

  • Engineering & Computer Science (AREA)
  • Quality & Reliability (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Maintenance And Management Of Digital Transmission (AREA)

Abstract

PURPOSE:To take a proper measure against a fault, by judging that a fault occurs in an opposite information transmitting and receiving device when continuous ''1'' signals are detected in the receiving signal of an information transmitting and receiving device and by judging that a fault occurs in an information transmission line when the receiving signal is a ''0'' signal. CONSTITUTION:An information transmitting and receiving device 1' consists of an information transmitting and receiving part 11 and a signal discriminating part 12, and a modulating and demodulating device 3' consists of a modulating and demodulating part 31 and a signal converting part 32. The device 3' transfers the ''1'' signal from a signal transmitting circuit 33 to the modulating and demodulating part 31 continuously and transmits a carrier wave to an information transmission line 5. When a prescribed or more number of continuous ''1'' signals are detected from the receiving signal by the signal discriminating part 12 of the device 1', these signals are sent to the transmitting part 11 to judge that a fault occurs in an opposite transmitting and receiving device. Meanwhile, when the coming carrier wave is broken in the device 3', the modulating and demodulating part 31 sends the ''0'' signal to the signal discriminating part 12 of the device 1', and the ''1'' signal is supplied to the transmitting and receiving part 11 to judge that a fault occurs in the transmission line 5.
JP55163040A 1980-11-19 1980-11-19 High-level transmission control procedure line monitoring method Expired JPS6053975B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55163040A JPS6053975B2 (en) 1980-11-19 1980-11-19 High-level transmission control procedure line monitoring method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55163040A JPS6053975B2 (en) 1980-11-19 1980-11-19 High-level transmission control procedure line monitoring method

Publications (2)

Publication Number Publication Date
JPS5787264A true JPS5787264A (en) 1982-05-31
JPS6053975B2 JPS6053975B2 (en) 1985-11-28

Family

ID=15766032

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55163040A Expired JPS6053975B2 (en) 1980-11-19 1980-11-19 High-level transmission control procedure line monitoring method

Country Status (1)

Country Link
JP (1) JPS6053975B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6450134A (en) * 1987-08-20 1989-02-27 Nec Corp Fault analyzing system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6450134A (en) * 1987-08-20 1989-02-27 Nec Corp Fault analyzing system

Also Published As

Publication number Publication date
JPS6053975B2 (en) 1985-11-28

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