JPS52151505A - Alarm sending system - Google Patents

Alarm sending system

Info

Publication number
JPS52151505A
JPS52151505A JP6771976A JP6771976A JPS52151505A JP S52151505 A JPS52151505 A JP S52151505A JP 6771976 A JP6771976 A JP 6771976A JP 6771976 A JP6771976 A JP 6771976A JP S52151505 A JPS52151505 A JP S52151505A
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.)
Granted
Application number
JP6771976A
Other languages
Japanese (ja)
Other versions
JPS5744266B2 (en
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 JP6771976A priority Critical patent/JPS52151505A/en
Publication of JPS52151505A publication Critical patent/JPS52151505A/en
Publication of JPS5744266B2 publication Critical patent/JPS5744266B2/ja
Granted 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 using the trunk line between the exchanges for the general telephone call for both transmission and reception which uses the pulse system line signal.
JP6771976A 1976-06-11 1976-06-11 Alarm sending system Granted JPS52151505A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6771976A JPS52151505A (en) 1976-06-11 1976-06-11 Alarm sending system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6771976A JPS52151505A (en) 1976-06-11 1976-06-11 Alarm sending system

Publications (2)

Publication Number Publication Date
JPS52151505A true JPS52151505A (en) 1977-12-16
JPS5744266B2 JPS5744266B2 (en) 1982-09-20

Family

ID=13353032

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6771976A Granted JPS52151505A (en) 1976-06-11 1976-06-11 Alarm sending system

Country Status (1)

Country Link
JP (1) JPS52151505A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5167718A (en) * 1974-12-06 1976-06-11 Daicel Ltd 22 merukaputo pirijin n okisaidoaenennoseizoho

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5167718A (en) * 1974-12-06 1976-06-11 Daicel Ltd 22 merukaputo pirijin n okisaidoaenennoseizoho

Also Published As

Publication number Publication date
JPS5744266B2 (en) 1982-09-20

Similar Documents

Publication Publication Date Title
ZA744858B (en) Selective signal receiver for use in telecommunication, particularly telephone systems
JPS52151504A (en) Alarm sending system
JPS52151505A (en) Alarm sending system
JPS5362404A (en) Incoming call charging system
JPS5375804A (en) Individual selective calling device
JPS53117922A (en) Absence reception voice answer skip system
JPS52125213A (en) Absence transfer system
JPS5422107A (en) Telephone calling device
JPS5296803A (en) Telephone unit
JPS5394808A (en) Multi-frequency signal receving system
JPS5333505A (en) Multi-frequency signal output monitor system for key telephone set
JPS53111215A (en) Confirmation communication system
JPS5399806A (en) Intra-office connection system
JPS5379414A (en) Non-delay connection system
JPS5432908A (en) Main wire centralized ringing device for telephone
JPS5410604A (en) Main wire holding circuit for key telephone system
AU486469B2 (en) Selective signal receiver for use in telecommunication, particularly telephone systems
JPS5440506A (en) First ringing control system for time-division exchange
JPS5297609A (en) Abnormal traffic detection system
JPS5363904A (en) Individual selection calling device
AU7203674A (en) Selective signal receiver for use in telecommunication, particularly telephone systems
JPS5232209A (en) Howler signal outgoing system
JPS5390704A (en) Incoming response system
JPS53113408A (en) Control system for call tone and call signal
JPS5328316A (en) Busy tone outgoing system