JPS53132911A - Telephone set - Google Patents

Telephone set

Info

Publication number
JPS53132911A
JPS53132911A JP4735977A JP4735977A JPS53132911A JP S53132911 A JPS53132911 A JP S53132911A JP 4735977 A JP4735977 A JP 4735977A JP 4735977 A JP4735977 A JP 4735977A JP S53132911 A JPS53132911 A JP S53132911A
Authority
JP
Japan
Prior art keywords
telephone set
generating
making
hand
case
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
JP4735977A
Other languages
Japanese (ja)
Inventor
Yasuhiro Ono
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 JP4735977A priority Critical patent/JPS53132911A/en
Publication of JPS53132911A publication Critical patent/JPS53132911A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/66—Substation equipment, e.g. for use by subscribers with means for preventing unauthorised or fraudulent calling
    • H04M1/663—Preventing unauthorised calls to a telephone set

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Signal Processing (AREA)

Abstract

PURPOSE:To make use of a telephone circuit effectively without any hand, by making it possible to receive sound information without generating an incoming tone in the nighttime except the case of an emergency call.
JP4735977A 1977-04-26 1977-04-26 Telephone set Pending JPS53132911A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4735977A JPS53132911A (en) 1977-04-26 1977-04-26 Telephone set

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4735977A JPS53132911A (en) 1977-04-26 1977-04-26 Telephone set

Publications (1)

Publication Number Publication Date
JPS53132911A true JPS53132911A (en) 1978-11-20

Family

ID=12772922

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4735977A Pending JPS53132911A (en) 1977-04-26 1977-04-26 Telephone set

Country Status (1)

Country Link
JP (1) JPS53132911A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61167254A (en) * 1985-01-21 1986-07-28 Hashimoto Corp Automatic answering telephone set capable of paging
JPS62199155A (en) * 1986-02-27 1987-09-02 Canon Inc Communication equipment

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4952506A (en) * 1972-06-26 1974-05-22

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4952506A (en) * 1972-06-26 1974-05-22

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61167254A (en) * 1985-01-21 1986-07-28 Hashimoto Corp Automatic answering telephone set capable of paging
JPH0314376B2 (en) * 1985-01-21 1991-02-26 Hashimoto Corp
JPS62199155A (en) * 1986-02-27 1987-09-02 Canon Inc Communication equipment

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