JPS5351908A - Caller identification system for party line telephone - Google Patents

Caller identification system for party line telephone

Info

Publication number
JPS5351908A
JPS5351908A JP12606676A JP12606676A JPS5351908A JP S5351908 A JPS5351908 A JP S5351908A JP 12606676 A JP12606676 A JP 12606676A JP 12606676 A JP12606676 A JP 12606676A JP S5351908 A JPS5351908 A JP S5351908A
Authority
JP
Japan
Prior art keywords
identification system
caller identification
line telephone
party line
party
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
JP12606676A
Other languages
Japanese (ja)
Inventor
Kozo Kamata
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 JP12606676A priority Critical patent/JPS5351908A/en
Publication of JPS5351908A publication Critical patent/JPS5351908A/en
Pending legal-status Critical Current

Links

Landscapes

  • Devices For Supply Of Signal Current (AREA)

Abstract

PURPOSE: To enable the identification of call by two common seven subscribers, by inverting the polarity of the station power supply.
COPYRIGHT: (C)1978,JPO&Japio
JP12606676A 1976-10-22 1976-10-22 Caller identification system for party line telephone Pending JPS5351908A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12606676A JPS5351908A (en) 1976-10-22 1976-10-22 Caller identification system for party line telephone

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12606676A JPS5351908A (en) 1976-10-22 1976-10-22 Caller identification system for party line telephone

Publications (1)

Publication Number Publication Date
JPS5351908A true JPS5351908A (en) 1978-05-11

Family

ID=14925769

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12606676A Pending JPS5351908A (en) 1976-10-22 1976-10-22 Caller identification system for party line telephone

Country Status (1)

Country Link
JP (1) JPS5351908A (en)

Similar Documents

Publication Publication Date Title
JPS5313803A (en) Mobile communication system
JPS5323219A (en) Multiple-address communication system
JPS5313806A (en) Telephone extension system
JPS5283009A (en) Connecting system for incoming during communication
JPS5318302A (en) Cordless telephone unit
JPS5216108A (en) Call loss correcting system
JPS5351908A (en) Caller identification system for party line telephone
JPS51128205A (en) Telephone device
JPS5247305A (en) Extension calling systemof button telephone system
JPS542604A (en) Originating subscriber confirmation system
JPS52125213A (en) Absence transfer system
JPS527610A (en) Telephone responding system
JPS51148305A (en) Telephone charge integrator for telephones
JPS51117808A (en) Incoming call transfer service system
JPS5345907A (en) Scanning system of telephone subscriber
JPS538512A (en) Facsimile communication system
JPS51115712A (en) Call detection method in automatic telephone exchange
JPS5232209A (en) Howler signal outgoing system
JPS51113401A (en) Privacy telephone communication system
JPS5422705A (en) Extension subscriber calling system
JPS51120603A (en) Collect call system
JPS5289004A (en) Detecting process for concentrated call
JPS5395507A (en) Transfer information system
JPS5390704A (en) Incoming response system
JPS51148314A (en) Audible call charge notice system