JPS5723370A - Alarm system using community antenna televison circuit - Google Patents

Alarm system using community antenna televison circuit

Info

Publication number
JPS5723370A
JPS5723370A JP9775280A JP9775280A JPS5723370A JP S5723370 A JPS5723370 A JP S5723370A JP 9775280 A JP9775280 A JP 9775280A JP 9775280 A JP9775280 A JP 9775280A JP S5723370 A JPS5723370 A JP S5723370A
Authority
JP
Japan
Prior art keywords
circuit
repeater
signal
televison
alarm system
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
JP9775280A
Other languages
Japanese (ja)
Other versions
JPS6161591B2 (en
Inventor
Mitsuo Imai
Yukio Koyama
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 Cable Ltd
Original Assignee
Hitachi Cable 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 Cable Ltd filed Critical Hitachi Cable Ltd
Priority to JP9775280A priority Critical patent/JPS5723370A/en
Publication of JPS5723370A publication Critical patent/JPS5723370A/en
Publication of JPS6161591B2 publication Critical patent/JPS6161591B2/ja
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B25/00—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems
    • G08B25/01—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems characterised by the transmission medium
    • G08B25/08—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems characterised by the transmission medium using communication transmission lines
    • G08B25/085—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems characterised by the transmission medium using communication transmission lines using central distribution transmission lines

Landscapes

  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)

Abstract

PURPOSE:To prevent interference without increasing the number of repeaters, by placing a repeater in the vicinity of a distributor, placing a separator behind it, dividing an alarm signal from each subscriber's terminal, and inputting it to the repeater. CONSTITUTION:A signal separator 32 is provided before a signal is inputted to a signal distributor 33', so that an alarm signal is directly inputted to a repeater. Accordingly, an alarm signal from each subscriber's terminal corresponding to each circuit is not inputted to other circuit by the signal distributor 33', therefore, it is independent each other. In this way, each repeater 52 is able to divide subscriber's terminals in a group which said repeater controls, into a lot of groups.
JP9775280A 1980-07-17 1980-07-17 Alarm system using community antenna televison circuit Granted JPS5723370A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9775280A JPS5723370A (en) 1980-07-17 1980-07-17 Alarm system using community antenna televison circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9775280A JPS5723370A (en) 1980-07-17 1980-07-17 Alarm system using community antenna televison circuit

Publications (2)

Publication Number Publication Date
JPS5723370A true JPS5723370A (en) 1982-02-06
JPS6161591B2 JPS6161591B2 (en) 1986-12-26

Family

ID=14200606

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9775280A Granted JPS5723370A (en) 1980-07-17 1980-07-17 Alarm system using community antenna televison circuit

Country Status (1)

Country Link
JP (1) JPS5723370A (en)

Also Published As

Publication number Publication date
JPS6161591B2 (en) 1986-12-26

Similar Documents

Publication Publication Date Title
JPS5723370A (en) Alarm system using community antenna televison circuit
JPS5547768A (en) Facsimile callout system
JPS57103467A (en) Public terminal communication system
DE3462651D1 (en) Switching system
JPS5728494A (en) Private branch of exchange system
JPS5228810A (en) Automatic telephone exchange system
JPS53125704A (en) Dispatching control system utilizing multichannel access system
JPS56122555A (en) Switching control system
JPS56156056A (en) Discriminating system for incoming call
JPS5335402A (en) Optical fibre communicating system
JPS55136759A (en) Line test system
JPS5437605A (en) Confirmation system of objective terminal
JPS5799858A (en) Public terminal communication system
JPS5323202A (en) Scan system
JPS56132843A (en) Subscriber's line signal system
JPS56164639A (en) Satellite communication system
JPS5495109A (en) Pb receiver connection system
JPS5455306A (en) Multi-address communication system of time-division switchboard
JPS56102147A (en) Data switching system
JPS57111136A (en) Carrier signal transmission system by distribution line
JPS56160168A (en) Exchange system
JPS56120239A (en) Simple privacy telephone system
JPS56122581A (en) Digital trunk equipment
JPS57145467A (en) Calling state separating system
JPS572147A (en) Broadcast communication signal system