JPS56119570A - Emergency communication system - Google Patents

Emergency communication system

Info

Publication number
JPS56119570A
JPS56119570A JP2220780A JP2220780A JPS56119570A JP S56119570 A JPS56119570 A JP S56119570A JP 2220780 A JP2220780 A JP 2220780A JP 2220780 A JP2220780 A JP 2220780A JP S56119570 A JPS56119570 A JP S56119570A
Authority
JP
Japan
Prior art keywords
terminal equipment
power source
function
voltage applied
wire line
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
JP2220780A
Other languages
English (en)
Japanese (ja)
Other versions
JPS6313585B2 (enrdf_load_stackoverflow
Inventor
Takao Miyamoto
Yoshimi Harada
Shoji Hosaka
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.)
Idemitsu Kosan Co Ltd
Iwatsu Electric Co Ltd
Original Assignee
Idemitsu Kosan Co Ltd
Iwatsu 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 Idemitsu Kosan Co Ltd, Iwatsu Electric Co Ltd filed Critical Idemitsu Kosan Co Ltd
Priority to JP2220780A priority Critical patent/JPS56119570A/ja
Publication of JPS56119570A publication Critical patent/JPS56119570A/ja
Publication of JPS6313585B2 publication Critical patent/JPS6313585B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M11/00—Telephonic communication systems specially adapted for combination with other electrical systems
    • H04M11/04—Telephonic communication systems specially adapted for combination with other electrical systems with alarm systems, e.g. fire, police or burglar alarm systems

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Alarm Systems (AREA)
  • Interconnected Communication Systems, Intercoms, And Interphones (AREA)
  • Sub-Exchange Stations And Push- Button Telephones (AREA)
JP2220780A 1980-02-26 1980-02-26 Emergency communication system Granted JPS56119570A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2220780A JPS56119570A (en) 1980-02-26 1980-02-26 Emergency communication system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2220780A JPS56119570A (en) 1980-02-26 1980-02-26 Emergency communication system

Publications (2)

Publication Number Publication Date
JPS56119570A true JPS56119570A (en) 1981-09-19
JPS6313585B2 JPS6313585B2 (enrdf_load_stackoverflow) 1988-03-26

Family

ID=12076342

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2220780A Granted JPS56119570A (en) 1980-02-26 1980-02-26 Emergency communication system

Country Status (1)

Country Link
JP (1) JPS56119570A (enrdf_load_stackoverflow)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58134569A (ja) * 1982-02-04 1983-08-10 Nippon Telegr & Teleph Corp <Ntt> 網制御装置の電源供給方式
JPS601966A (ja) * 1983-06-17 1985-01-08 Nippon Telegr & Teleph Corp <Ntt> 宅内装置の給電起動停止方式
JPS60106262A (ja) * 1983-11-15 1985-06-11 Nec Corp 端末給電方式

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58134569A (ja) * 1982-02-04 1983-08-10 Nippon Telegr & Teleph Corp <Ntt> 網制御装置の電源供給方式
JPS601966A (ja) * 1983-06-17 1985-01-08 Nippon Telegr & Teleph Corp <Ntt> 宅内装置の給電起動停止方式
JPS60106262A (ja) * 1983-11-15 1985-06-11 Nec Corp 端末給電方式

Also Published As

Publication number Publication date
JPS6313585B2 (enrdf_load_stackoverflow) 1988-03-26

Similar Documents

Publication Publication Date Title
ES2018742A6 (es) Sistema de interfono de television de dos cables.
JPS56119570A (en) Emergency communication system
JPS57141148A (en) Radio telephone set
JPS57160258A (en) Circuit switching device
JPS57143969A (en) Monitoring method for fault of public telephone and fault signal sending circuit and fault signal monitoring circuit
JPS5725743A (en) Maintenance system of radio telephone system
JPS57121361A (en) Remote control system utilizing telephone network
JPS57113672A (en) Call control system in facsimile device or the like
JPS57201366A (en) Remote monitor device
JPS56131247A (en) Remote maintenance system
JPS5795744A (en) Automatic line switching device for data communication device
JPS56124903A (en) Mobile monitoring equipment
JPS5469096A (en) Signal equipment for extinction-type induction lamp
JPS5757040A (en) Switching control system for n versus 1 constitution
JPS5510266A (en) Controller
JPS577686A (en) Prevention system for failure in recovery from fault of manual holding circuit
JPS56140759A (en) Network controller for telephone circuit
JPS6416154A (en) Communication system
JPS5799069A (en) Call display device in transfer telephone
JPS56123140A (en) Cordless telephone set
JPS57123793A (en) Two-wire signal transmission system
JPS5485606A (en) Push-button dial telephone set
JPS6417547A (en) Remote supervisory equipment
JPS56149831A (en) Duplex line switching unit
JPS6465934A (en) Line switching device