JPS52139305A - Extension calling system for key telephone equipment - Google Patents

Extension calling system for key telephone equipment

Info

Publication number
JPS52139305A
JPS52139305A JP5531876A JP5531876A JPS52139305A JP S52139305 A JPS52139305 A JP S52139305A JP 5531876 A JP5531876 A JP 5531876A JP 5531876 A JP5531876 A JP 5531876A JP S52139305 A JPS52139305 A JP S52139305A
Authority
JP
Japan
Prior art keywords
key telephone
telephone equipment
calling system
extension calling
extension
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
JP5531876A
Other languages
English (en)
Japanese (ja)
Other versions
JPS5613055B2 (enExample
Inventor
Koichi Sekiguchi
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.)
Iwatsu Electric Co Ltd
Original Assignee
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 Iwatsu Electric Co Ltd filed Critical Iwatsu Electric Co Ltd
Priority to JP5531876A priority Critical patent/JPS52139305A/ja
Publication of JPS52139305A publication Critical patent/JPS52139305A/ja
Priority to US06/066,927 priority patent/US4410767A/en
Publication of JPS5613055B2 publication Critical patent/JPS5613055B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Sub-Exchange Stations And Push- Button Telephones (AREA)
JP5531876A 1976-05-17 1976-05-17 Extension calling system for key telephone equipment Granted JPS52139305A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP5531876A JPS52139305A (en) 1976-05-17 1976-05-17 Extension calling system for key telephone equipment
US06/066,927 US4410767A (en) 1976-05-17 1979-08-16 Key telephone system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5531876A JPS52139305A (en) 1976-05-17 1976-05-17 Extension calling system for key telephone equipment

Publications (2)

Publication Number Publication Date
JPS52139305A true JPS52139305A (en) 1977-11-21
JPS5613055B2 JPS5613055B2 (enExample) 1981-03-26

Family

ID=12995190

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5531876A Granted JPS52139305A (en) 1976-05-17 1976-05-17 Extension calling system for key telephone equipment

Country Status (1)

Country Link
JP (1) JPS52139305A (enExample)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6422192A (en) * 1987-07-17 1989-01-25 Iwatsu Electric Co Ltd Telephone system

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5847555U (ja) * 1981-09-29 1983-03-30 日信工業株式会社 傾斜油路を有するタンデムマスタシリンダ

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5513668A (en) * 1978-07-15 1980-01-30 Matsushita Electric Works Ltd Method of manufacturing current distributed track

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5513668A (en) * 1978-07-15 1980-01-30 Matsushita Electric Works Ltd Method of manufacturing current distributed track

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6422192A (en) * 1987-07-17 1989-01-25 Iwatsu Electric Co Ltd Telephone system

Also Published As

Publication number Publication date
JPS5613055B2 (enExample) 1981-03-26

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