JPS52151504A - Alarm sending system - Google Patents

Alarm sending system

Info

Publication number
JPS52151504A
JPS52151504A JP6771876A JP6771876A JPS52151504A JP S52151504 A JPS52151504 A JP S52151504A JP 6771876 A JP6771876 A JP 6771876A JP 6771876 A JP6771876 A JP 6771876A JP S52151504 A JPS52151504 A JP S52151504A
Authority
JP
Japan
Prior art keywords
sending system
alarm sending
transmission
make
alarm
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
JP6771876A
Other languages
Japanese (ja)
Inventor
Yoshiharu Kondo
Tsutomu Minoshima
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 JP6771876A priority Critical patent/JPS52151504A/en
Publication of JPS52151504A publication Critical patent/JPS52151504A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/08—Indicating faults in circuits or apparatus

Landscapes

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

Abstract

PURPOSE:To make it possible to make fault transmission by use of the trunk line between the exchanges for the general telephone call of transmission and reception using the pulse system line signal.
JP6771876A 1976-06-11 1976-06-11 Alarm sending system Pending JPS52151504A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6771876A JPS52151504A (en) 1976-06-11 1976-06-11 Alarm sending system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6771876A JPS52151504A (en) 1976-06-11 1976-06-11 Alarm sending system

Publications (1)

Publication Number Publication Date
JPS52151504A true JPS52151504A (en) 1977-12-16

Family

ID=13353005

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6771876A Pending JPS52151504A (en) 1976-06-11 1976-06-11 Alarm sending system

Country Status (1)

Country Link
JP (1) JPS52151504A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0284852A (en) * 1989-08-09 1990-03-26 Hitachi Ltd Trouble transfer system

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5167719A (en) * 1974-10-24 1976-06-11 Searle & Co

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5167719A (en) * 1974-10-24 1976-06-11 Searle & Co

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0284852A (en) * 1989-08-09 1990-03-26 Hitachi Ltd Trouble transfer system

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