JPS574641A - Bco originating connection system - Google Patents

Bco originating connection system

Info

Publication number
JPS574641A
JPS574641A JP7763680A JP7763680A JPS574641A JP S574641 A JPS574641 A JP S574641A JP 7763680 A JP7763680 A JP 7763680A JP 7763680 A JP7763680 A JP 7763680A JP S574641 A JPS574641 A JP S574641A
Authority
JP
Japan
Prior art keywords
bco
contact
originating
key
closed
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
JP7763680A
Other languages
Japanese (ja)
Inventor
Yasuyuki Shimaoka
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP7763680A priority Critical patent/JPS574641A/en
Publication of JPS574641A publication Critical patent/JPS574641A/en
Pending legal-status Critical Current

Links

Classifications

    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Monitoring And Testing Of Exchanges (AREA)

Abstract

PURPOSE:To give a control to the BCO originating connection given from a tester without killing the originating function of a subscriber to be tested, by giving a short circuit to the dial pulse contact and preventing the subsequent transmission of dial pulses. CONSTITUTION:An operator telephone circuit 1 is connected to a subscriber terminal to be tested through a dial contact 2 and then a line trunk. When a tester operates the BCO key, a connection is secured to an originating register trunk by a DC loop of the circuit 1. In this case, a normally opened contact 3 of the BCO key is closed by a testing device to give a short circuit to the contact 2. At the same time, a normally closed contact 4 of the BCO key is closed to form an AC loop and thus to prepare a monitor for subsequent originatings.
JP7763680A 1980-06-11 1980-06-11 Bco originating connection system Pending JPS574641A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7763680A JPS574641A (en) 1980-06-11 1980-06-11 Bco originating connection system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7763680A JPS574641A (en) 1980-06-11 1980-06-11 Bco originating connection system

Publications (1)

Publication Number Publication Date
JPS574641A true JPS574641A (en) 1982-01-11

Family

ID=13639376

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7763680A Pending JPS574641A (en) 1980-06-11 1980-06-11 Bco originating connection system

Country Status (1)

Country Link
JP (1) JPS574641A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20170134628A (en) 2015-04-07 2017-12-06 가부시키가이샤 이와키 Two reciprocating pumps

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20170134628A (en) 2015-04-07 2017-12-06 가부시키가이샤 이와키 Two reciprocating pumps

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