GB1082484A - Two-way telegraph system - Google Patents

Two-way telegraph system

Info

Publication number
GB1082484A
GB1082484A GB4172664A GB4172664A GB1082484A GB 1082484 A GB1082484 A GB 1082484A GB 4172664 A GB4172664 A GB 4172664A GB 4172664 A GB4172664 A GB 4172664A GB 1082484 A GB1082484 A GB 1082484A
Authority
GB
United Kingdom
Prior art keywords
signal
station
group
character
sequence
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
GB4172664A
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 GB1082484A publication Critical patent/GB1082484A/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)
  • Mobile Radio Communication Systems (AREA)
  • Communication Control (AREA)
  • Detection And Prevention Of Errors In Transmission (AREA)

Abstract

1,082,484. Data transmission. DE STAAT DER NEDERLANDEN, TEN DEZE VERTEGENWOORDIGD DOOR DE DIRECTEURGENERAAL DER POSTERIJEN, TELEGRAFIE EN TELEFONIE. Oct. 13, 1964 [Oct. 15, 1963], No.41726/64. Heading H4P. A digital data transmission system in which errors are corrected by repetition comprises first and second stations, each of which transmits a sequence of data signals to the other. In both sequences, adjacent signals belong to alternate groups. Each station must receive an unmutilated signal from the other station prior to transmitting a signal in the sequence. If a station detects an error, then, instead of the next signal in the sequence, it transmits a service signal indicating the group of the character awaited (i.e. of the character mutilated) and the group of the character that the station intends to transmit next. On detection of this service signal the required signal is retransmitted. If there is received a service signal indicating the intention to send a signal of a group which, is not that awaited by the receiving station, that station sends a service signal indicating the signal group which is required.
GB4172664A 1963-10-15 1964-10-13 Two-way telegraph system Expired GB1082484A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL299278A NL299278A (en) 1963-10-15 1963-10-15

Publications (1)

Publication Number Publication Date
GB1082484A true GB1082484A (en) 1967-09-06

Family

ID=19755137

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4172664A Expired GB1082484A (en) 1963-10-15 1964-10-13 Two-way telegraph system

Country Status (3)

Country Link
DE (1) DE1279715B (en)
GB (1) GB1082484A (en)
NL (2) NL299278A (en)

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1100678B (en) * 1959-09-25 1961-03-02 Siemens Ag Method for the transmission of telegraphic step groups with a constant number of steps encoded in a fault-indicating code, each of which is secured by a control character

Also Published As

Publication number Publication date
DE1279715B (en) 1968-10-10
NL130512C (en)
NL299278A (en) 1965-08-10

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