JPS56119546A - Line monitor system - Google Patents

Line monitor system

Info

Publication number
JPS56119546A
JPS56119546A JP2257180A JP2257180A JPS56119546A JP S56119546 A JPS56119546 A JP S56119546A JP 2257180 A JP2257180 A JP 2257180A JP 2257180 A JP2257180 A JP 2257180A JP S56119546 A JPS56119546 A JP S56119546A
Authority
JP
Japan
Prior art keywords
station
code
error
transmitted
test code
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
JP2257180A
Other languages
Japanese (ja)
Inventor
Shizuo Asano
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.)
NEC Corp
Original Assignee
NEC Corp
Nippon Electric 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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP2257180A priority Critical patent/JPS56119546A/en
Publication of JPS56119546A publication Critical patent/JPS56119546A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J1/00—Frequency-division multiplex systems
    • H04J1/02—Details
    • H04J1/16—Monitoring arrangements

Abstract

PURPOSE:To transfer the section of the line fault and error contents to the center station or the monitor station, by transmitting the test code between stations and by collating this test code with the collation code, in the line monitor device of the carrier multiple communication device. CONSTITUTION:The test code of station A is modulated and is transmitted to station B as the signal of one channel which is not used for communication. In station B, the test code is reproduced and is collated with the code from collation coder 17. If the error is detected, error contents are stored and are read by control circuit 19; and after the station code is added, they are returned to station A and are displayed in station A. Next, the test code is transmitted from station B to station C in monitoring of the line from station B to station C; and if the error is detected in station C, the station code is added to error contents, and they are transmitted to station B. In station B, error information returned from station C is stored after code collation and is read by control circuit 19 and is transmitted to station A, and error information of station C is displayed in station A.
JP2257180A 1980-02-25 1980-02-25 Line monitor system Pending JPS56119546A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2257180A JPS56119546A (en) 1980-02-25 1980-02-25 Line monitor system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2257180A JPS56119546A (en) 1980-02-25 1980-02-25 Line monitor system

Publications (1)

Publication Number Publication Date
JPS56119546A true JPS56119546A (en) 1981-09-19

Family

ID=12086556

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2257180A Pending JPS56119546A (en) 1980-02-25 1980-02-25 Line monitor system

Country Status (1)

Country Link
JP (1) JPS56119546A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63199533A (en) * 1987-02-14 1988-08-18 Nec Corp Intelligent tdm
JPH0420136A (en) * 1990-05-15 1992-01-23 Nippon Telegr & Teleph Corp <Ntt> Transmitting device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63199533A (en) * 1987-02-14 1988-08-18 Nec Corp Intelligent tdm
JPH0420136A (en) * 1990-05-15 1992-01-23 Nippon Telegr & Teleph Corp <Ntt> Transmitting device

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