GB970142A - Simplex telegraph system with break-in facility - Google Patents

Simplex telegraph system with break-in facility

Info

Publication number
GB970142A
GB970142A GB4170762A GB4170762A GB970142A GB 970142 A GB970142 A GB 970142A GB 4170762 A GB4170762 A GB 4170762A GB 4170762 A GB4170762 A GB 4170762A GB 970142 A GB970142 A GB 970142A
Authority
GB
United Kingdom
Prior art keywords
signal
answer
receiver
block
signals
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
GB4170762A
Inventor
Herman Da Silva
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 GB970142A publication Critical patent/GB970142A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/14—Two-way operation using the same type of signal, i.e. duplex
    • H04L5/16—Half-duplex systems; Simplex/duplex switching; Transmission of break signals non-automatically inverting the direction of transmission
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Detection And Prevention Of Errors In Transmission (AREA)
  • Radio Relay Systems (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)

Abstract

970,142. Telegraphy. DE STAAT DER NEDERLANDEN, TEN DEZE VERTEGENWOORDIGD DOOR DE DIRECTEURGENERAAL DER POSTERIJEN, TELEGRAFIE EN TELEFONIE. Nov. 5 1962 [Nov. 10, 1961], No. 41707/62. Heading H4P. In an error-correcting simplex telegraph system in which signals are sent in blocks spaced apart by sufficient time to receive one or other of two answer-back signals, a third answer-back signal is provided so that the direction of main transmission can be altered either on the initiative of the receiver or of the transmitter. If block 1 (a b c) is the last information block to be transmitted, upon reception from the distant receiver Y of answer-back signal R2 transmitter X sends block 2 which is a special signal combination (Cy, +, ?). Receiver Y recognizes this as a request to switch to transmission of information blocks and so transmits the special answer-back signal R3 to inform the station X that it is to switch to reception. Station X now transmits a block of idle-time signals (#α#) which cause Y to transmit a calling signal III and subsequently to transmit information block 1 (p q r) &c. Should the system be non-synchronous the station receiving signal R3-which in this case comprises a sequence of pulses alternately f1 and f2-will open a gate for a preset time to enable this signal to be recognized. If the signal is received mutilated, due to the instants of frequency change occurring in phase with the receiver time base, on repetition it is shifted in phase by “ of an element period. Preferably the answer-back signals are of the form in which one can simulate another only by double transposition. Specifications 930,128 and 970,141 are referred to.
GB4170762A 1961-11-10 1962-11-05 Simplex telegraph system with break-in facility Expired GB970142A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL271227A NL124707C (en) 1961-11-10 1961-11-10

Publications (1)

Publication Number Publication Date
GB970142A true GB970142A (en) 1964-09-16

Family

ID=19753405

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4170762A Expired GB970142A (en) 1961-11-10 1962-11-05 Simplex telegraph system with break-in facility

Country Status (8)

Country Link
JP (1) JPS5130401B1 (en)
BE (1) BE624597A (en)
CH (1) CH421179A (en)
DE (1) DE1174354B (en)
GB (1) GB970142A (en)
NL (1) NL124707C (en)
NO (1) NO116586B (en)
SE (1) SE300123B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1290949B (en) * 1967-07-20 1969-03-20 Telefunken Patent Single telegraph method in which traffic signs are sent in blocks in one direction of traffic
JPS5482502U (en) * 1977-11-22 1979-06-12

Also Published As

Publication number Publication date
BE624597A (en) 1963-03-01
JPS5130401B1 (en) 1976-09-01
NL124707C (en) 1968-10-15
SE300123B (en) 1968-04-08
DE1174354B (en) 1964-07-23
CH421179A (en) 1966-09-30
NL271227A (en) 1964-07-27
NO116586B (en) 1969-04-21

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