JPS5252509A - Recording control unit - Google Patents

Recording control unit

Info

Publication number
JPS5252509A
JPS5252509A JP12828175A JP12828175A JPS5252509A JP S5252509 A JPS5252509 A JP S5252509A JP 12828175 A JP12828175 A JP 12828175A JP 12828175 A JP12828175 A JP 12828175A JP S5252509 A JPS5252509 A JP S5252509A
Authority
JP
Japan
Prior art keywords
control unit
recording control
recording
telephone
stopped
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
JP12828175A
Other languages
Japanese (ja)
Inventor
Kaoru Chiba
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 JP12828175A priority Critical patent/JPS5252509A/en
Publication of JPS5252509A publication Critical patent/JPS5252509A/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
    • H04M1/64—Automatic arrangements for answering calls; Automatic arrangements for recording messages for absent subscribers; Arrangements for recording conversations
    • H04M1/65—Recording arrangements for recording a message from the calling party
    • H04M1/654—Telephone line monitoring circuits therefor, e.g. ring detectors
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/82—Line monitoring circuits for call progress or status discrimination

Landscapes

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

Abstract

PURPOSE:The automatic telephone answering device is controlled so that recording is stopped through detection of oscillation sound cycle when the calling party cuts off telephone.
JP12828175A 1975-10-27 1975-10-27 Recording control unit Pending JPS5252509A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12828175A JPS5252509A (en) 1975-10-27 1975-10-27 Recording control unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12828175A JPS5252509A (en) 1975-10-27 1975-10-27 Recording control unit

Publications (1)

Publication Number Publication Date
JPS5252509A true JPS5252509A (en) 1977-04-27

Family

ID=14980935

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12828175A Pending JPS5252509A (en) 1975-10-27 1975-10-27 Recording control unit

Country Status (1)

Country Link
JP (1) JPS5252509A (en)

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