GB542730A - Improvements in or relating to arrangements for telegraph transmission - Google Patents

Improvements in or relating to arrangements for telegraph transmission

Info

Publication number
GB542730A
GB542730A GB1070240A GB1070240A GB542730A GB 542730 A GB542730 A GB 542730A GB 1070240 A GB1070240 A GB 1070240A GB 1070240 A GB1070240 A GB 1070240A GB 542730 A GB542730 A GB 542730A
Authority
GB
United Kingdom
Prior art keywords
telephone
telegraph
exchange
line
phantom
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
GB1070240A
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.)
JAN SOBOLA
LUCIEN ANGELIN GUSTAVE ALPHONS
Original Assignee
JAN SOBOLA
LUCIEN ANGELIN GUSTAVE ALPHONS
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 to BE442655D priority Critical patent/BE442655A/xx
Application filed by JAN SOBOLA, LUCIEN ANGELIN GUSTAVE ALPHONS filed Critical JAN SOBOLA
Priority to GB1070240A priority patent/GB542730A/en
Priority to CH226794D priority patent/CH226794A/de
Publication of GB542730A publication Critical patent/GB542730A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/38—Synchronous or start-stop systems, e.g. for Baudot code
    • H04L25/40—Transmitting circuits; Receiving circuits
    • H04L25/49—Transmitting circuits; Receiving circuits using code conversion at the transmitter; using predistortion; using insertion of idle bits for obtaining a desired frequency spectrum; using three or more amplitude levels ; Baseband coding techniques specific to data transmission systems
    • 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)
  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Power Engineering (AREA)
  • Interface Circuits In Exchanges (AREA)
GB1070240A 1940-06-21 1940-06-21 Improvements in or relating to arrangements for telegraph transmission Expired GB542730A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
BE442655D BE442655A (cs) 1940-06-21
GB1070240A GB542730A (en) 1940-06-21 1940-06-21 Improvements in or relating to arrangements for telegraph transmission
CH226794D CH226794A (de) 1940-06-21 1941-08-01 Impulstelegraphenanlage.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1070240A GB542730A (en) 1940-06-21 1940-06-21 Improvements in or relating to arrangements for telegraph transmission

Publications (1)

Publication Number Publication Date
GB542730A true GB542730A (en) 1942-01-26

Family

ID=9972709

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1070240A Expired GB542730A (en) 1940-06-21 1940-06-21 Improvements in or relating to arrangements for telegraph transmission

Country Status (3)

Country Link
BE (1) BE442655A (cs)
CH (1) CH226794A (cs)
GB (1) GB542730A (cs)

Also Published As

Publication number Publication date
BE442655A (cs)
CH226794A (de) 1943-04-30

Similar Documents

Publication Publication Date Title
US2264396A (en) Power line carrier frequency telephone system
US4024359A (en) Continuity-checking network for telecommunication system
CA1213649A (en) Secondary channel method and apparatus
GB542730A (en) Improvements in or relating to arrangements for telegraph transmission
US3617645A (en) Signaling circuit with audible noise reduction
US2184835A (en) System for transmitting communications
US2294237A (en) Telephone circuit
DK151997B (da) Transformatorfri gaffelkobling
GB430297A (en) Improvements in or relating to telegraph repeater circuits
US1919046A (en) Selective calling circuits
US1324130A (en) Telegraph system.
US2056277A (en) Telegraph repeating system
US1734104A (en) Two-way transmission with repeaters
US1562989A (en) Signaling circuits
US1664468A (en) Program-selecting circuits
US1634299A (en) Telegraph circuits
US3819868A (en) Common control switching network for telegraph and telephone exchange
US2232063A (en) Arrangement for the transmission of intelligence
US2567148A (en) Telephone signaling device
US2422700A (en) Reciprocal signaling trunk telephone system
US1823948A (en) Radio telephone and telegraph system
US2102735A (en) Carrier telegraph system
US978083A (en) Telephone repeater system.
US1717083A (en) Carrier signal system
US3259698A (en) Solid state intercommunication system