FR2305078A1 - Monitor television and internal telephone interconnection system - uses two conductor wires and system is controlled from push button selector - Google Patents

Monitor television and internal telephone interconnection system - uses two conductor wires and system is controlled from push button selector

Info

Publication number
FR2305078A1
FR2305078A1 FR7509389A FR7509389A FR2305078A1 FR 2305078 A1 FR2305078 A1 FR 2305078A1 FR 7509389 A FR7509389 A FR 7509389A FR 7509389 A FR7509389 A FR 7509389A FR 2305078 A1 FR2305078 A1 FR 2305078A1
Authority
FR
France
Prior art keywords
push button
controlled
button selector
conductor wires
monitor television
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
FR7509389A
Other languages
French (fr)
Other versions
FR2305078B3 (en
Inventor
Herbert Glaser
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.)
ACET Srl
Original Assignee
ACET Srl
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 ACET Srl filed Critical ACET Srl
Priority to FR7509389A priority Critical patent/FR2305078A1/en
Publication of FR2305078A1 publication Critical patent/FR2305078A1/en
Application granted granted Critical
Publication of FR2305078B3 publication Critical patent/FR2305078B3/fr
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M11/00—Telephonic communication systems specially adapted for combination with other electrical systems
    • H04M11/02—Telephonic communication systems specially adapted for combination with other electrical systems with bell or annunciator systems
    • H04M11/025—Door telephones
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/18—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast
    • H04N7/183—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast for receiving images from a single remote source
    • H04N7/186—Video door telephones

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Closed-Circuit Television Systems (AREA)
  • Interconnected Communication Systems, Intercoms, And Interphones (AREA)

Abstract

Interconnection and control circuitry is used for television monitoring and caller identification by an internal speaking line. The circuitry design is intended partic. for modern apartment blocks where the complexity of such arrangements is minimised by the use of the proposed two wire system minimising fault states. Operationj of the various services is initiated by a push button selector. Lighting for the television camera is provided for between 30 and 60 second rather after which it is switched out if not being utilised. The technique allows the use of a large number of circuits, control being derived from six individual blocks. The master block provides the power supply to the remainder via a transistor and transformer circuit.
FR7509389A 1975-03-21 1975-03-21 Monitor television and internal telephone interconnection system - uses two conductor wires and system is controlled from push button selector Granted FR2305078A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7509389A FR2305078A1 (en) 1975-03-21 1975-03-21 Monitor television and internal telephone interconnection system - uses two conductor wires and system is controlled from push button selector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7509389A FR2305078A1 (en) 1975-03-21 1975-03-21 Monitor television and internal telephone interconnection system - uses two conductor wires and system is controlled from push button selector

Publications (2)

Publication Number Publication Date
FR2305078A1 true FR2305078A1 (en) 1976-10-15
FR2305078B3 FR2305078B3 (en) 1977-12-02

Family

ID=9153080

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7509389A Granted FR2305078A1 (en) 1975-03-21 1975-03-21 Monitor television and internal telephone interconnection system - uses two conductor wires and system is controlled from push button selector

Country Status (1)

Country Link
FR (1) FR2305078A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5805677A (en) * 1991-07-11 1998-09-08 Sbc Technology Resources, Inc. Apparatus for facilitating the display of information relating to the origin of a third source caller

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6816481B1 (en) 1999-04-09 2004-11-09 Sbc Technology Resources, Inc. Internet caller identification system and method
US7809121B2 (en) 2001-06-22 2010-10-05 At&T Intellectual Property I, L.P. Identification of calling devices dialing a universal number to access a telecommunications relay service center

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5805677A (en) * 1991-07-11 1998-09-08 Sbc Technology Resources, Inc. Apparatus for facilitating the display of information relating to the origin of a third source caller
US6052444A (en) * 1991-07-11 2000-04-18 Sbc Technology Resources, Inc. Tele-communication information display system

Also Published As

Publication number Publication date
FR2305078B3 (en) 1977-12-02

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Legal Events

Date Code Title Description
ST Notification of lapse