IT976190B - SYSTEM FOR THE TRANSMISSION OF SIGNALS ON SIGNALING LINES INSTALLED IN BUILDINGS - Google Patents

SYSTEM FOR THE TRANSMISSION OF SIGNALS ON SIGNALING LINES INSTALLED IN BUILDINGS

Info

Publication number
IT976190B
IT976190B IT7106272A IT7106272A IT976190B IT 976190 B IT976190 B IT 976190B IT 7106272 A IT7106272 A IT 7106272A IT 7106272 A IT7106272 A IT 7106272A IT 976190 B IT976190 B IT 976190B
Authority
IT
Italy
Prior art keywords
buildings
signals
transmission
signaling lines
lines installed
Prior art date
Application number
IT7106272A
Other languages
Italian (it)
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 IT976190B publication Critical patent/IT976190B/en

Links

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00Television systems
    • H04N7/18Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast
    • H04N7/183Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast for receiving images from a single remote source
    • H04N7/186Video door telephones
    • GPHYSICS
    • G08SIGNALLING
    • G08BSIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B1/00Systems for signalling characterised solely by the form of transmission of the signal
    • G08B1/08Systems 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
    • GPHYSICS
    • G08SIGNALLING
    • G08BSIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B3/00Audible signalling systems; Audible personal calling systems
    • G08B3/10Audible signalling systems; Audible personal calling systems using electric transmission; using electromagnetic transmission
    • G08B3/1008Personal calling arrangements or devices, i.e. paging systems
    • HELECTRICITY
    • H03ELECTRONIC CIRCUITRY
    • H03KPULSE TECHNIQUE
    • H03K17/00Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/51Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
    • H03K17/56Electronic 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
    • HELECTRICITY
    • H03ELECTRONIC CIRCUITRY
    • H03MCODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M7/00Conversion 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
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B3/00Line transmission systems
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B3/00Line transmission systems
    • H04B3/02Details
    • H04B3/44Arrangements for feeding power to a repeater along the transmission line
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04MTELEPHONIC COMMUNICATION
    • H04M11/00Telephonic communication systems specially adapted for combination with other electrical systems
    • H04M11/02Telephonic communication systems specially adapted for combination with other electrical systems with bell or annunciator systems
    • H04M11/022Paging systems
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04MTELEPHONIC COMMUNICATION
    • H04M11/00Telephonic communication systems specially adapted for combination with other electrical systems
    • H04M11/02Telephonic communication systems specially adapted for combination with other electrical systems with bell or annunciator systems
    • H04M11/025Door telephones
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04MTELEPHONIC COMMUNICATION
    • H04M9/00Arrangements for interconnection not involving centralised switching
    • H04M9/001Two-way communication systems between a limited number of parties
IT7106272A 1971-12-31 1972-12-22 SYSTEM FOR THE TRANSMISSION OF SIGNALS ON SIGNALING LINES INSTALLED IN BUILDINGS IT976190B (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
IT976190B true IT976190B (en) 1974-08-20

Family

ID=25762266

Family Applications (1)

Application Number Title Priority Date Filing Date
IT7106272A IT976190B (en) 1971-12-31 1972-12-22 SYSTEM FOR THE TRANSMISSION OF SIGNALS ON SIGNALING LINES INSTALLED IN BUILDINGS

Country Status (4)

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

Families Citing this family (4)

* 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
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
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.

Also Published As

Publication number Publication date
GB1422130A (en) 1976-01-21
NL7217676A (en) 1973-07-03
FR2167183A5 (en) 1973-08-17

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