GB1068433A - Frequency code method for tele-control and tele-command - Google Patents

Frequency code method for tele-control and tele-command

Info

Publication number
GB1068433A
GB1068433A GB2865164A GB2865164A GB1068433A GB 1068433 A GB1068433 A GB 1068433A GB 2865164 A GB2865164 A GB 2865164A GB 2865164 A GB2865164 A GB 2865164A GB 1068433 A GB1068433 A GB 1068433A
Authority
GB
United Kingdom
Prior art keywords
station
central station
remote
address
remote 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
GB2865164A
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 GB1068433A publication Critical patent/GB1068433A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q9/00—Arrangements in telecontrol or telemetry systems for selectively calling a substation from a main station, in which substation desired apparatus is selected for applying a control signal thereto or for obtaining measured values therefrom
    • H04Q9/08—Calling by using continuous ac
    • H04Q9/12—Calling by using continuous ac using combinations of frequencies

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Selective Calling Equipment (AREA)

Abstract

1,068,433. Selective signalling. STANDARD TELEPHONES & CABLES Ltd. July 10, 1964 [July 11, 1963], No. 28651/64. Heading G4H. In a signalling system comprising a central station and a plurality of remote stations connected in parallel to the central station, addresses and data are both transmitted as simultaneous combinations of frequencies. Transmission from remote station to central station.-Remote stations are so arranged that if any item, of a plurality of stored items, changes, the entire contents of the store are transmitted. Firstly the remote station transmits a combination of frequencies representing its address. Correct reception of the address by the central station readies a corresponding store and causes an answer-back signal-identical to the address signal transmitted by the remote station-to be sent. Correct reception of the answer-back signal causes the remote station to transmit the contents of its store. The answer-back signal also prevents any other remote station transmitting. Transmission from central station to remote station.-Transmission of control signals from the central station to a remote station is effected in a similar manner Firstly the central station transmits the address of the remote station, which, when it is ready to receive, responds by transmitting the same address back to the central station, whereupon the central station transmits the control signal.
GB2865164A 1963-07-11 1964-07-10 Frequency code method for tele-control and tele-command Expired GB1068433A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEST20846A DE1188666B (en) 1963-07-11 1963-07-11 Frequency code method for remote monitoring and control

Publications (1)

Publication Number Publication Date
GB1068433A true GB1068433A (en) 1967-05-10

Family

ID=7458731

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2865164A Expired GB1068433A (en) 1963-07-11 1964-07-10 Frequency code method for tele-control and tele-command

Country Status (2)

Country Link
DE (1) DE1188666B (en)
GB (1) GB1068433A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2520042A1 (en) * 1975-05-06 1976-11-18 Hans Prof Dr Ing Marko Test system for digital communications amplifiers - has logic in repeater amplifiers producing test signals

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2520042A1 (en) * 1975-05-06 1976-11-18 Hans Prof Dr Ing Marko Test system for digital communications amplifiers - has logic in repeater amplifiers producing test signals

Also Published As

Publication number Publication date
DE1188666B (en) 1965-03-11

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