GB987770A - Telegraph switching system - Google Patents

Telegraph switching system

Info

Publication number
GB987770A
GB987770A GB1820062A GB1820062A GB987770A GB 987770 A GB987770 A GB 987770A GB 1820062 A GB1820062 A GB 1820062A GB 1820062 A GB1820062 A GB 1820062A GB 987770 A GB987770 A GB 987770A
Authority
GB
United Kingdom
Prior art keywords
normal
booking
priority
receivers
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
GB1820062A
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.)
STC PLC
Original Assignee
Standard Telephone and Cables PLC
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 Standard Telephone and Cables PLC filed Critical Standard Telephone and Cables PLC
Publication of GB987770A publication Critical patent/GB987770A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Small-Scale Networks (AREA)
  • Radio Relay Systems (AREA)

Abstract

987,770. Telegraphy. STANDARD TELEPHONES & CABLES Ltd. May 11, 1962 [May 16, 1961], No. 18200/62. Drawings to Specification. Heading H4P. The invention provides a telegraph switching system wherein normal traffic can be interrupted temporarily by a station having greater priority. Normal transmission takes place over a fourwire line between two stations, but when a priority signal is received from a booking station (e.g. a passenger seat booking office) switching operations are initiated to switch off the normal transmitters and receivers and to bring in circuit the central booking office. Booking data is then transmitted over the four wire line, followed by a release signal which causes the normal transmitters and receivers to be brought back to operation. It is arranged that switchover to the priority system can not occur until after the transmission of a complete code combination, so that such a combination is not received mutilated.
GB1820062A 1961-05-16 1962-05-11 Telegraph switching system Expired GB987770A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEST17821A DE1167379B (en) 1961-05-16 1961-05-16 Circuit arrangement for switching a teleprinter connection operated between two message memories to the exchange of messages between two privileged subscribers

Publications (1)

Publication Number Publication Date
GB987770A true GB987770A (en) 1965-03-31

Family

ID=7457615

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1820062A Expired GB987770A (en) 1961-05-16 1962-05-11 Telegraph switching system

Country Status (3)

Country Link
CH (1) CH393414A (en)
DE (1) DE1167379B (en)
GB (1) GB987770A (en)

Also Published As

Publication number Publication date
CH393414A (en) 1965-06-15
DE1167379B (en) 1964-04-09

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