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JPS5399802A - Specific subscriber calling equipment of automatic answering telephone set - Google Patents

Specific subscriber calling equipment of automatic answering telephone set

Info

Publication number
JPS5399802A
JPS5399802A JP1514977A JP1514977A JPS5399802A JP S5399802 A JPS5399802 A JP S5399802A JP 1514977 A JP1514977 A JP 1514977A JP 1514977 A JP1514977 A JP 1514977A JP S5399802 A JPS5399802 A JP S5399802A
Authority
JP
Japan
Prior art keywords
automatic answering
telephone set
specific subscriber
answering telephone
calling equipment
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
JP1514977A
Other languages
Japanese (ja)
Inventor
Masanori Murao
Toshio Tanaka
Akira Yamaguchi
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.)
Nippon Telegraph and Telephone Corp
Original Assignee
Nippon Telegraph and Telephone Corp
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 Nippon Telegraph and Telephone Corp filed Critical Nippon Telegraph and Telephone Corp
Priority to JP1514977A priority Critical patent/JPS5399802A/en
Publication of JPS5399802A publication Critical patent/JPS5399802A/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
    • H04M1/665—Preventing unauthorised calls to a telephone set by checking the validity of a code

Landscapes

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

Abstract

PURPOSE:To make it possible to answer only specific calls by selecting many and unspecified incoming calls in addition to the normal automatic answering function, by providing an additional unit.
JP1514977A 1977-02-14 1977-02-14 Specific subscriber calling equipment of automatic answering telephone set Pending JPS5399802A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1514977A JPS5399802A (en) 1977-02-14 1977-02-14 Specific subscriber calling equipment of automatic answering telephone set

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1514977A JPS5399802A (en) 1977-02-14 1977-02-14 Specific subscriber calling equipment of automatic answering telephone set

Publications (1)

Publication Number Publication Date
JPS5399802A true JPS5399802A (en) 1978-08-31

Family

ID=11880735

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1514977A Pending JPS5399802A (en) 1977-02-14 1977-02-14 Specific subscriber calling equipment of automatic answering telephone set

Country Status (1)

Country Link
JP (1) JPS5399802A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5533340A (en) * 1978-08-31 1980-03-08 Nippon Telegr & Teleph Corp <Ntt> Remote control system for automatic answering telephone set
JPS5541003A (en) * 1978-09-15 1980-03-22 Fujitsu Ltd Selective response system of telephone
JPS5563157A (en) * 1978-11-02 1980-05-13 Nippon Telegr & Teleph Corp <Ntt> Automatic answering telephone system
JPS5991766A (en) * 1982-11-18 1984-05-26 Iwatsu Electric Co Ltd Tone ringer method
JPS60163556A (en) * 1984-02-06 1985-08-26 Hitachi Ltd answering machine
JPS62294362A (en) * 1986-06-12 1987-12-21 Sanyo Electric Co Ltd Telephone set
FR2771576A1 (en) * 1997-11-25 1999-05-28 Richardier Martin Rene Filtering procedure for use with telephone answerphone

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 (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5533340A (en) * 1978-08-31 1980-03-08 Nippon Telegr & Teleph Corp <Ntt> Remote control system for automatic answering telephone set
JPS5541003A (en) * 1978-09-15 1980-03-22 Fujitsu Ltd Selective response system of telephone
JPS5563157A (en) * 1978-11-02 1980-05-13 Nippon Telegr & Teleph Corp <Ntt> Automatic answering telephone system
JPS5991766A (en) * 1982-11-18 1984-05-26 Iwatsu Electric Co Ltd Tone ringer method
JPS60163556A (en) * 1984-02-06 1985-08-26 Hitachi Ltd answering machine
JPS62294362A (en) * 1986-06-12 1987-12-21 Sanyo Electric Co Ltd Telephone set
FR2771576A1 (en) * 1997-11-25 1999-05-28 Richardier Martin Rene Filtering procedure for use with telephone answerphone

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