GB661866A - Coupling circuit arrangement for coupling a two-wire direct-current telegraph line to a two-channel trunk - Google Patents

Coupling circuit arrangement for coupling a two-wire direct-current telegraph line to a two-channel trunk

Info

Publication number
GB661866A
GB661866A GB34973/47A GB3497347A GB661866A GB 661866 A GB661866 A GB 661866A GB 34973/47 A GB34973/47 A GB 34973/47A GB 3497347 A GB3497347 A GB 3497347A GB 661866 A GB661866 A GB 661866A
Authority
GB
United Kingdom
Prior art keywords
current
line
valve
mark
trunk
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
Application number
GB34973/47A
Other languages
English (en)
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.)
Nederlanden Staat
Original Assignee
Nederlanden Staat
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 Nederlanden Staat filed Critical Nederlanden Staat
Publication of GB661866A publication Critical patent/GB661866A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/10—Frequency-modulated carrier systems, i.e. using frequency-shift keying
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/20—Repeater circuits; Relay circuits
    • H04L25/22—Repeaters for converting two wires to four wires; Repeaters for converting single current to double current

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Power Engineering (AREA)
  • Devices For Supply Of Signal Current (AREA)
  • Inductance-Capacitance Distribution Constants And Capacitance-Resistance Oscillators (AREA)
GB34973/47A 1946-09-09 1947-12-31 Coupling circuit arrangement for coupling a two-wire direct-current telegraph line to a two-channel trunk Expired GB661866A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL283928X 1946-09-09

Publications (1)

Publication Number Publication Date
GB661866A true GB661866A (en) 1951-11-28

Family

ID=19782418

Family Applications (1)

Application Number Title Priority Date Filing Date
GB34973/47A Expired GB661866A (en) 1946-09-09 1947-12-31 Coupling circuit arrangement for coupling a two-wire direct-current telegraph line to a two-channel trunk

Country Status (6)

Country Link
US (1) US2551694A (forum.php)
BE (1) BE483169A (forum.php)
CH (1) CH283928A (forum.php)
FR (1) FR958761A (forum.php)
GB (1) GB661866A (forum.php)
NL (1) NL67468C (forum.php)

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1874981A (en) * 1928-10-02 1932-08-30 Rca Corp Voltage regulator
US2408794A (en) * 1942-10-20 1946-10-08 Bell Telephone Labor Inc Carrier wave signal system
US2461456A (en) * 1944-02-11 1949-02-08 Rca Corp Frequency shift keying

Also Published As

Publication number Publication date
CH283928A (fr) 1952-06-30
FR958761A (forum.php) 1950-03-17
NL67468C (forum.php)
BE483169A (forum.php)
US2551694A (en) 1951-05-08

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