JPS55124352A - Bracketing test method - Google Patents

Bracketing test method

Info

Publication number
JPS55124352A
JPS55124352A JP3103079A JP3103079A JPS55124352A JP S55124352 A JPS55124352 A JP S55124352A JP 3103079 A JP3103079 A JP 3103079A JP 3103079 A JP3103079 A JP 3103079A JP S55124352 A JPS55124352 A JP S55124352A
Authority
JP
Japan
Prior art keywords
circuit
test
unit
ledd1
signal
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
JP3103079A
Other languages
Japanese (ja)
Other versions
JPS5821470B2 (en
Inventor
Kyoichi Nakakawara
Fukue Ogawa
Kazuo Kanai
Yoshimi Sato
Kazuhiko Shirai
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.)
Toshiba Corp
NEC Corp
Nippon Telegraph and Telephone Corp
Original Assignee
Toshiba Corp
NEC Corp
Nippon Telegraph and Telephone Corp
Tokyo Shibaura Electric Co Ltd
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 Toshiba Corp, NEC Corp, Nippon Telegraph and Telephone Corp, Tokyo Shibaura Electric Co Ltd, Nippon Electric Co Ltd filed Critical Toshiba Corp
Priority to JP54031030A priority Critical patent/JPS5821470B2/en
Publication of JPS55124352A publication Critical patent/JPS55124352A/en
Publication of JPS5821470B2 publication Critical patent/JPS5821470B2/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
    • H04L1/24—Testing correct operation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/22—Arrangements for supervision, monitoring or testing
    • H04M3/26—Arrangements for supervision, monitoring or testing with means for applying test signals or for measuring
    • H04M3/28—Automatic routine testing ; Fault testing; Installation testing; Test methods, test equipment or test arrangements therefor
    • H04M3/30—Automatic routine testing ; Fault testing; Installation testing; Test methods, test equipment or test arrangements therefor for subscriber's lines, for the local loop
    • H04M3/301—Circuit arrangements at the subscriber's side of the line

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Monitoring And Testing Of Exchanges (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)
  • Selective Calling Equipment (AREA)

Abstract

PURPOSE:To secure the test for the network control unit without visiting the subscriber's home by realizing the remote test method for the bracketing test function of the network control unit through the telephone office. CONSTITUTION:Both false terminal call signal S1 and test signal S2 sent from test unit 60 are piled onto telephone circuit 20 after exchange caught circuit 20, and then the polarity of circuit 20 is inverted. At network control unit 40, signals S1 and S2 are detected through signal detection circuits 421 and 423 to generate output pulses b and c. Connection control circuit 44 turns on test reply circuit 45 via the logic product of pulses b and c. As a result, the return loop is formed within unit 40, and thus DC current e flows to circuit 20. Thus driving current f flows to LEDD1 of circuit 60 to give light emission to LEDD1. At the same time, the output pulse is generated from detection circuit 423 in the state under which only signal S2 is transmitted to unit 40 from circuit 60. However, circuits 45 and 431 are turned off by circuit 44, and thus no return loop is formed. Accordingly, no driving current flows to LEDD1.
JP54031030A 1979-03-19 1979-03-19 Cutting test method Expired JPS5821470B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP54031030A JPS5821470B2 (en) 1979-03-19 1979-03-19 Cutting test method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP54031030A JPS5821470B2 (en) 1979-03-19 1979-03-19 Cutting test method

Publications (2)

Publication Number Publication Date
JPS55124352A true JPS55124352A (en) 1980-09-25
JPS5821470B2 JPS5821470B2 (en) 1983-04-30

Family

ID=12320104

Family Applications (1)

Application Number Title Priority Date Filing Date
JP54031030A Expired JPS5821470B2 (en) 1979-03-19 1979-03-19 Cutting test method

Country Status (1)

Country Link
JP (1) JPS5821470B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5624866A (en) * 1979-08-06 1981-03-10 Nippon Telegr & Teleph Corp <Ntt> Sectioning test circuit
JPS61251354A (en) * 1985-04-30 1986-11-08 Fujitsu Ltd Remote control system for line terminating equipment

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63172674U (en) * 1987-04-28 1988-11-09

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5624866A (en) * 1979-08-06 1981-03-10 Nippon Telegr & Teleph Corp <Ntt> Sectioning test circuit
JPS5827708B2 (en) * 1979-08-06 1983-06-10 日本電信電話株式会社 Cut test circuit
JPS61251354A (en) * 1985-04-30 1986-11-08 Fujitsu Ltd Remote control system for line terminating equipment
JPH0414909B2 (en) * 1985-04-30 1992-03-16 Fujitsu Ltd

Also Published As

Publication number Publication date
JPS5821470B2 (en) 1983-04-30

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