IT993358B - Dispositivo trasmettitore di numera zione mediante livelli di tensione - Google Patents

Dispositivo trasmettitore di numera zione mediante livelli di tensione

Info

Publication number
IT993358B
IT993358B IT2922873A IT2922873A IT993358B IT 993358 B IT993358 B IT 993358B IT 2922873 A IT2922873 A IT 2922873A IT 2922873 A IT2922873 A IT 2922873A IT 993358 B IT993358 B IT 993358B
Authority
IT
Italy
Prior art keywords
voltage levels
transmitter device
number transmitter
levels
voltage
Prior art date
Application number
IT2922873A
Other languages
English (en)
Italian (it)
Original Assignee
Cit Alcatel
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 Cit Alcatel filed Critical Cit Alcatel
Application granted granted Critical
Publication of IT993358B publication Critical patent/IT993358B/it

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements
    • H04Q3/42—Circuit arrangements for indirect selecting controlled by common circuits, e.g. register controller, marker
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/26—Devices for calling a subscriber
    • H04M1/515—Devices for calling a subscriber by generating or selecting signals other than trains of pulses of similar shape, or signals other than currents of one or more different frequencies, e.g. generation of DC signals of alternating polarity, coded pulses or impedance dialling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q1/00—Details of selecting apparatus or arrangements
    • H04Q1/18—Electrical details
    • H04Q1/30—Signalling arrangements; Manipulation of signalling currents
    • H04Q1/38—Signalling arrangements; Manipulation of signalling currents using combinations of direct currents of different amplitudes or polarities over line conductors or combination of line conductors

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Telephone Set Structure (AREA)
  • Input From Keyboards Or The Like (AREA)
IT2922873A 1972-09-21 1973-09-21 Dispositivo trasmettitore di numera zione mediante livelli di tensione IT993358B (it)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7233529A FR2199921A5 (en(2012)) 1972-09-21 1972-09-21

Publications (1)

Publication Number Publication Date
IT993358B true IT993358B (it) 1975-09-30

Family

ID=9104608

Family Applications (1)

Application Number Title Priority Date Filing Date
IT2922873A IT993358B (it) 1972-09-21 1973-09-21 Dispositivo trasmettitore di numera zione mediante livelli di tensione

Country Status (7)

Country Link
BE (1) BE804753A (en(2012))
CH (1) CH578809A5 (en(2012))
DE (1) DE2345757A1 (en(2012))
FR (1) FR2199921A5 (en(2012))
GB (1) GB1423668A (en(2012))
IT (1) IT993358B (en(2012))
NL (1) NL7313088A (en(2012))

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3036801C2 (de) * 1980-09-30 1982-08-26 Ritto-Werk Loh GmbH & Co KG, 6348 Herborn Schaltungsanordnung zur Übertragung von Gleichstrom-Kennzeichen über eine zweiradrige Leitung von einer Sendestelle zu einer Empfangsstelle, insbesondere von einer Sprechstelle zu der Zentrale einer Sprechanlage
GB8614199D0 (en) * 1986-06-11 1986-07-16 Salplex Ltd Information handling & control systems

Also Published As

Publication number Publication date
FR2199921A5 (en(2012)) 1974-04-12
DE2345757A1 (de) 1974-03-28
NL7313088A (en(2012)) 1974-03-25
BE804753A (fr) 1974-03-12
GB1423668A (en) 1976-02-04
CH578809A5 (en(2012)) 1976-08-13

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