GB1088726A - Two-way telegraph system - Google Patents

Two-way telegraph system

Info

Publication number
GB1088726A
GB1088726A GB4172564A GB4172564A GB1088726A GB 1088726 A GB1088726 A GB 1088726A GB 4172564 A GB4172564 A GB 4172564A GB 4172564 A GB4172564 A GB 4172564A GB 1088726 A GB1088726 A GB 1088726A
Authority
GB
United Kingdom
Prior art keywords
state
counter
results
signal
station
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
GB4172564A
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
Nederlanden Volksgezondheid Welzijn en Sport VWS
Telegrafie En Telefonie
TEN DEZE VERTEGENWOORDIGD DOOR
Original Assignee
Nederlanden Staat
Nederlanden Volksgezondheid Welzijn en Sport VWS
Telegrafie En Telefonie
TEN DEZE VERTEGENWOORDIGD DOOR
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, Nederlanden Volksgezondheid Welzijn en Sport VWS, Telegrafie En Telefonie, TEN DEZE VERTEGENWOORDIGD DOOR filed Critical Nederlanden Staat
Publication of GB1088726A publication Critical patent/GB1088726A/en
Expired legal-status Critical Current

Links

Classifications

    • 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)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Detection And Prevention Of Errors In Transmission (AREA)
  • Radio Relay Systems (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)
  • Communication Control (AREA)

Abstract

1,088,726. Telegraphy. DE STAAT DER NEDERLANDEN, TEN DEZE VERTEGENWOORDIGD DOOR DE DIRECTEURGENERAAL DER POSTERIJEN, TELEGRAFIE EN TELEFONIE. Oct. 13. 1964 [Oct. 15, 1963], No. 41725/64. Heading H4P. In a two-way telegraph system in which errors are corrected by repetition, the stations transmit alternately and a station can transmit only after reception from the other station. Both stations have a two-state counter, normally in state 1. If a first station detects error in a received signal (character or block of characters) it returns a service signal S1 or S2, depending on the state 1 or 2 of the local counter, and then the counter changes state. At the receiver, when its counter is in state 1, reception of (a) a mutilated signal results in transmission of S1, or (b) S1 results in repetition of the previous traffic signal, and the counter changes to state 2. However, when its counter is in state 2, reception of (c) a traffic signal results in transmission of the next traffic signal; or (d) a mutilated signal results in S2; or (e) S2 results in repetition of the previous traffic signal; or (f) S1 results in S2, and the counter reverts to state 1. Every correctly received character is printed. The time gap between transmission of signals from either station may be filled by signals from other stations.
GB4172564A 1963-10-15 1964-10-13 Two-way telegraph system Expired GB1088726A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL299276A NL299276A (en) 1963-10-15 1963-10-15

Publications (1)

Publication Number Publication Date
GB1088726A true GB1088726A (en) 1967-10-25

Family

ID=19755135

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4172564A Expired GB1088726A (en) 1963-10-15 1964-10-13 Two-way telegraph system

Country Status (2)

Country Link
GB (1) GB1088726A (en)
NL (2) NL299276A (en)

Also Published As

Publication number Publication date
DE1437344A1 (en) 1969-03-20
DE1437344B2 (en) 1972-07-20
NL128778C (en)
NL299276A (en) 1965-08-10

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