JPS52120710A - Extension telephone system - Google Patents

Extension telephone system

Info

Publication number
JPS52120710A
JPS52120710A JP3812376A JP3812376A JPS52120710A JP S52120710 A JPS52120710 A JP S52120710A JP 3812376 A JP3812376 A JP 3812376A JP 3812376 A JP3812376 A JP 3812376A JP S52120710 A JPS52120710 A JP S52120710A
Authority
JP
Japan
Prior art keywords
telephone system
extension telephone
extension
telephone
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
JP3812376A
Other languages
Japanese (ja)
Other versions
JPS5923140B2 (en
Inventor
Emu Buraun Uiriamu
Emu Radeii Jiyon
Teii Dan Robaato
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to JP51038123A priority Critical patent/JPS5923140B2/en
Publication of JPS52120710A publication Critical patent/JPS52120710A/en
Publication of JPS5923140B2 publication Critical patent/JPS5923140B2/en
Expired legal-status Critical Current

Links

Landscapes

  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
JP51038123A 1976-04-05 1976-04-05 AC power line carrier expansion telephone system Expired JPS5923140B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP51038123A JPS5923140B2 (en) 1976-04-05 1976-04-05 AC power line carrier expansion telephone system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP51038123A JPS5923140B2 (en) 1976-04-05 1976-04-05 AC power line carrier expansion telephone system

Publications (2)

Publication Number Publication Date
JPS52120710A true JPS52120710A (en) 1977-10-11
JPS5923140B2 JPS5923140B2 (en) 1984-05-31

Family

ID=12516668

Family Applications (1)

Application Number Title Priority Date Filing Date
JP51038123A Expired JPS5923140B2 (en) 1976-04-05 1976-04-05 AC power line carrier expansion telephone system

Country Status (1)

Country Link
JP (1) JPS5923140B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6172946U (en) * 1984-10-17 1986-05-17
JP2005295501A (en) * 2003-11-11 2005-10-20 Sumitomo Electric Ind Ltd Power line carrier communication system

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3280259A (en) * 1962-09-27 1966-10-18 John R Cotter Telephone repeater and portable telephone communication systems utilizing power line carrier currents
JPS4924003A (en) * 1972-06-26 1974-03-04

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3280259A (en) * 1962-09-27 1966-10-18 John R Cotter Telephone repeater and portable telephone communication systems utilizing power line carrier currents
JPS4924003A (en) * 1972-06-26 1974-03-04

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6172946U (en) * 1984-10-17 1986-05-17
JP2005295501A (en) * 2003-11-11 2005-10-20 Sumitomo Electric Ind Ltd Power line carrier communication system

Also Published As

Publication number Publication date
JPS5923140B2 (en) 1984-05-31

Similar Documents

Publication Publication Date Title
JPS52155934A (en) Interrcomputer communication system
GB1541902A (en) Telephone system
JPS52116031A (en) Communication system
AU3135877A (en) Electronic telephone system
JPS52149008A (en) Telephone system
JPS5384602A (en) Radio telephone system
JPS5350603A (en) Conference telephone system
JPS52149452A (en) Communication system
JPS52141502A (en) Communication system
JPS52113104A (en) Communication system
JPS5375709A (en) Handdfree telephone set
GB1546559A (en) Multi-pary telephone system
JPS5347709A (en) Communication system
JPS5294005A (en) Key telephone system
JPS52120710A (en) Extension telephone system
JPS5235909A (en) Telephone system
JPS52147004A (en) Pushhbutton telephone system
JPS53909A (en) Abbreviated dialling system
JPS5345101A (en) Key telephone system
JPS5330802A (en) Key telephone system
JPS52136509A (en) Key telephone system
JPS5370609A (en) Telephone set
JPS5338909A (en) Pushhbutton dial telephone system
JPS52129206A (en) Telephone system
JPS5343404A (en) Antiiexplosion telephone system