JPH054362Y2 - - Google Patents

Info

Publication number
JPH054362Y2
JPH054362Y2 JP1987088932U JP8893287U JPH054362Y2 JP H054362 Y2 JPH054362 Y2 JP H054362Y2 JP 1987088932 U JP1987088932 U JP 1987088932U JP 8893287 U JP8893287 U JP 8893287U JP H054362 Y2 JPH054362 Y2 JP H054362Y2
Authority
JP
Japan
Prior art keywords
voltage
capacitor
photocoupler
telephone line
rectifier
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.)
Expired - Lifetime
Application number
JP1987088932U
Other languages
English (en)
Japanese (ja)
Other versions
JPS63198250U (US06653308-20031125-C00197.png
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 filed Critical
Priority to JP1987088932U priority Critical patent/JPH054362Y2/ja
Priority to US07/081,666 priority patent/US4833703A/en
Publication of JPS63198250U publication Critical patent/JPS63198250U/ja
Application granted granted Critical
Publication of JPH054362Y2 publication Critical patent/JPH054362Y2/ja
Anticipated expiration legal-status Critical
Expired - Lifetime 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Devices For Supply Of Signal Current (AREA)
JP1987088932U 1987-06-09 1987-06-09 Expired - Lifetime JPH054362Y2 (US06653308-20031125-C00197.png)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP1987088932U JPH054362Y2 (US06653308-20031125-C00197.png) 1987-06-09 1987-06-09
US07/081,666 US4833703A (en) 1987-06-09 1987-08-04 On-hook control circuit for answering machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1987088932U JPH054362Y2 (US06653308-20031125-C00197.png) 1987-06-09 1987-06-09

Publications (2)

Publication Number Publication Date
JPS63198250U JPS63198250U (US06653308-20031125-C00197.png) 1988-12-20
JPH054362Y2 true JPH054362Y2 (US06653308-20031125-C00197.png) 1993-02-03

Family

ID=13956669

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1987088932U Expired - Lifetime JPH054362Y2 (US06653308-20031125-C00197.png) 1987-06-09 1987-06-09

Country Status (2)

Country Link
US (1) US4833703A (US06653308-20031125-C00197.png)
JP (1) JPH054362Y2 (US06653308-20031125-C00197.png)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4897793A (en) * 1988-01-26 1990-01-30 Francotyp-Postalia Gmbh Configuration for a franking machine
US5259022A (en) * 1991-01-07 1993-11-02 Thomson Consumer Electronics, Inc. Detector for use with an automatic disconnect feature in a telephone answering machine
FR2733381B1 (fr) * 1995-04-19 1997-05-30 Alcatel Business Systems Procede et dispositif de controle de la sauvegarde de l'enregistrement d'un message telephone pour appareillage dote d'une fonction de repondeur et appareillage dote d'un tel dispositif

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57109449A (en) * 1980-12-26 1982-07-07 Masao Uchiumi Call detecting circuit
JPS6272260A (ja) * 1985-09-26 1987-04-02 Matsushita Electric Ind Co Ltd 留守番電話装置

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1529452A (en) * 1975-04-10 1978-10-18 Ansafone Ltd Detection of direct currents or voltages
GB2092411A (en) * 1980-06-09 1982-08-11 Phone Mate Ltd Telephone answering machines
US4484036A (en) * 1981-05-18 1984-11-20 T.A.D. Avanti, Inc. Telephone ring detector system
US4444999A (en) * 1982-08-23 1984-04-24 Sparrevohn Frederic R Automatic electronic disconnector for subscriber terminal equipment
US4496797A (en) * 1983-09-29 1985-01-29 At&T Technologies, Inc. Circuit for automatically connecting and disconnecting a speakerphone to a telephone line

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57109449A (en) * 1980-12-26 1982-07-07 Masao Uchiumi Call detecting circuit
JPS6272260A (ja) * 1985-09-26 1987-04-02 Matsushita Electric Ind Co Ltd 留守番電話装置

Also Published As

Publication number Publication date
JPS63198250U (US06653308-20031125-C00197.png) 1988-12-20
US4833703A (en) 1989-05-23

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