GB1056453A - Improvements in electrical signalling systems - Google Patents

Improvements in electrical signalling systems

Info

Publication number
GB1056453A
GB1056453A GB2088263A GB2088263A GB1056453A GB 1056453 A GB1056453 A GB 1056453A GB 2088263 A GB2088263 A GB 2088263A GB 2088263 A GB2088263 A GB 2088263A GB 1056453 A GB1056453 A GB 1056453A
Authority
GB
United Kingdom
Prior art keywords
signal
transmitter
transmission
data
continuous signal
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
GB2088263A
Inventor
Azizuddin Hashim Ismai Lakhani
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.)
British Telecommunications PLC
British Telecommunications Research Ltd
Original Assignee
British Telecommunications PLC
British Telecommunications Research Ltd
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 British Telecommunications PLC, British Telecommunications Research Ltd filed Critical British Telecommunications PLC
Priority to GB2088263A priority Critical patent/GB1056453A/en
Publication of GB1056453A publication Critical patent/GB1056453A/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

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Dc Digital Transmission (AREA)

Abstract

1,056,453. Data transmission. BRITISH TELECOMMUNICATIONS RESEARCH Ltd. May 19, 1964 [May 24, 1963], No. 20882/63. Heading H4P. In a system in which the transmission of data is dependent upon the transmission of a continuous signal from the receiver, the receiver can start the transmitter by sending the signal for a pre-set period, whereupon the transmitter sends a synchronizing signal which is longer than the pre-set period. Data is then transmitted when the continuous signal is received. In the embodiment described the continuous signal is an RQ single frequency tone, the absence of which initiates repetition. Spurious pulses of RQ tone do not start the transmitter.
GB2088263A 1963-05-24 1963-05-24 Improvements in electrical signalling systems Expired GB1056453A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2088263A GB1056453A (en) 1963-05-24 1963-05-24 Improvements in electrical signalling systems

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2088263A GB1056453A (en) 1963-05-24 1963-05-24 Improvements in electrical signalling systems

Publications (1)

Publication Number Publication Date
GB1056453A true GB1056453A (en) 1967-01-25

Family

ID=10153343

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2088263A Expired GB1056453A (en) 1963-05-24 1963-05-24 Improvements in electrical signalling systems

Country Status (1)

Country Link
GB (1) GB1056453A (en)

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