FR2167183A5 - - Google Patents

Info

Publication number
FR2167183A5
FR2167183A5 FR7247043A FR7247043A FR2167183A5 FR 2167183 A5 FR2167183 A5 FR 2167183A5 FR 7247043 A FR7247043 A FR 7247043A FR 7247043 A FR7247043 A FR 7247043A FR 2167183 A5 FR2167183 A5 FR 2167183A5
Authority
FR
France
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
Application number
FR7247043A
Other languages
French (fr)
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.)
Kathrein SE
Original Assignee
Kathrein Werke KG
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
Priority claimed from DE19722236431 external-priority patent/DE2236431A1/en
Application filed by Kathrein Werke KG filed Critical Kathrein Werke KG
Application granted granted Critical
Publication of FR2167183A5 publication Critical patent/FR2167183A5/fr
Expired legal-status Critical Current

Links

Classifications

    • 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
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B1/00—Systems for signalling characterised solely by the form of transmission of the signal
    • G08B1/08—Systems for signalling characterised solely by the form of transmission of the signal using electric transmission ; transformation of alarm signals to electrical signals from a different medium, e.g. transmission of an electric alarm signal upon detection of an audible alarm signal
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B3/00—Audible signalling systems; Audible personal calling systems
    • G08B3/10—Audible signalling systems; Audible personal calling systems using electric transmission; using electromagnetic transmission
    • G08B3/1008—Personal calling arrangements or devices, i.e. paging systems
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
    • H03K17/56—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M7/00—Conversion of a code where information is represented by a given sequence or number of digits to a code where the same, similar or subset of information is represented by a different sequence or number of digits
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/02—Details
    • H04B3/44—Arrangements for feeding power to a repeater along the transmission line
    • 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
    • H04M11/022—Paging systems
    • 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
    • H04M—TELEPHONIC COMMUNICATION
    • H04M9/00—Arrangements for interconnection not involving centralised switching
    • H04M9/001—Two-way communication systems between a limited number of parties
FR7247043A 1971-12-31 1972-12-29 Expired FR2167183A5 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2165904 1971-12-31
DE19722236431 DE2236431A1 (en) 1972-07-25 1972-07-25 SYSTEM FOR MULTIPLE USE OF SIGNAL LINES IN BUILDINGS

Publications (1)

Publication Number Publication Date
FR2167183A5 true FR2167183A5 (en) 1973-08-17

Family

ID=25762266

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7247043A Expired FR2167183A5 (en) 1971-12-31 1972-12-29

Country Status (4)

Country Link
FR (1) FR2167183A5 (en)
GB (1) GB1422130A (en)
IT (1) IT976190B (en)
NL (1) NL7217676A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2612671A1 (en) * 1987-03-18 1988-09-23 Lorenzelli Marcel Door phone video system using a single coaxial cable for transmitting information, a standard, unmodified television receiver, and wireless remote control

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2123193B (en) * 1982-06-19 1985-12-11 James Ernest Gleave Public address system
KR940000250B1 (en) * 1989-12-28 1994-01-12 주식회사 금성사 Signal transmitting device of door phone
ES2245192B1 (en) * 2003-08-08 2007-02-16 Raul Gonzalez Martinez AUTOMATIC PORTER INSTALLATION WITH BIDIRECTIONAL ACCESS TO TELEPHONE LINE.

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2612671A1 (en) * 1987-03-18 1988-09-23 Lorenzelli Marcel Door phone video system using a single coaxial cable for transmitting information, a standard, unmodified television receiver, and wireless remote control

Also Published As

Publication number Publication date
NL7217676A (en) 1973-07-03
GB1422130A (en) 1976-01-21
IT976190B (en) 1974-08-20

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Legal Events

Date Code Title Description
ST Notification of lapse