GB971179A - Improvements in or relating to electrical signalling systems - Google Patents

Improvements in or relating to electrical signalling systems

Info

Publication number
GB971179A
GB971179A GB211263A GB211263A GB971179A GB 971179 A GB971179 A GB 971179A GB 211263 A GB211263 A GB 211263A GB 211263 A GB211263 A GB 211263A GB 971179 A GB971179 A GB 971179A
Authority
GB
United Kingdom
Prior art keywords
wires
over
pair
trunk
control circuit
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
GB211263A
Inventor
John Leslie Galvin
Alan William Roberts
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.)
Automatic Telephone and Electric Co Ltd
Original Assignee
Automatic Telephone and Electric Co 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 Automatic Telephone and Electric Co Ltd filed Critical Automatic Telephone and Electric Co Ltd
Priority to GB211263A priority Critical patent/GB971179A/en
Publication of GB971179A publication Critical patent/GB971179A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements
    • H04Q3/0016—Arrangements providing connection between exchanges

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Sub-Exchange Stations And Push- Button Telephones (AREA)

Abstract

971,179. Automatic exchange systems. AUTOMATIC TELEPHONE & ELECTRIC CO. Ltd. Jan. 17, 1963, No. 2112/63. Addition to 971,178. Drawings to Specification. Heading H4K. The system described in the parent Specification relates to the control of one or more routing selectors from a register-sender by the transmission to a common control circuit of code signals over a pair of wires. The present Specification is concerned with the control of a second routing selector which is located at a remote exchange reached over a 4-wire trunk with an additional pair of wires for impulsing and supervision. A common control circuit associated with the outgoing end of the trunk receives the code signals consisting of positive or negative potential on a pair of wires and repeats them in code form over a forward-loop circuit on either the go or return channel of the 4-wire trunk. Subsequent digits are repeated as ordinary impulses over the additional pair of wires mentioned above. Specification 971,177 also is referred to.
GB211263A 1963-01-17 1963-01-17 Improvements in or relating to electrical signalling systems Expired GB971179A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB211263A GB971179A (en) 1963-01-17 1963-01-17 Improvements in or relating to electrical signalling systems

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB211263A GB971179A (en) 1963-01-17 1963-01-17 Improvements in or relating to electrical signalling systems

Publications (1)

Publication Number Publication Date
GB971179A true GB971179A (en) 1964-09-30

Family

ID=9733828

Family Applications (1)

Application Number Title Priority Date Filing Date
GB211263A Expired GB971179A (en) 1963-01-17 1963-01-17 Improvements in or relating to electrical signalling systems

Country Status (1)

Country Link
GB (1) GB971179A (en)

Similar Documents

Publication Publication Date Title
ES360563A1 (en) Data transmission system
GB1068227A (en) Improvements in or relating to switching networks for use in telecommunications installations
GB1101936A (en) Improvements in or relating to electrical systems for the reception, storage, processing and retransmission of data
SE327219B (en)
GB1122924A (en) Circuit arrangement for a centrally controlled exchange, serving in common a telephone and a teleprinting network
GB971179A (en) Improvements in or relating to electrical signalling systems
ES202553A1 (en) Intercommunication systems
GB1456250A (en) Matrix control circuit
GB1011508A (en) Improvements in or relating to remote line concentrators
GB1019480A (en) Circuit arrangement to release registers in telecommunication, particularly telephone systems
GB1264576A (en)
GB926972A (en) A circuit arrangement for a telecommunication installation
GB398812A (en) Improvements in or relating to telephone systems or the like
GB1096243A (en) Improvements in and relating to switching networks for use in telecommunication exchanges
GB1252325A (en)
GB1075006A (en) Improvements in or relating to telecommunications systems
GB1074038A (en) Improvements in or relating to telecommunications exchange systems
GB1030188A (en) Telecommunication multi-frequency code signalling systems
SE336156B (en)
GB628177A (en) Improvements in or relating to telecommunication switching systems
JPS6444664A (en) Line blocking system
GB1131368A (en) Improvements in or relating to automatic telephone systems
GB1089633A (en) Traffic routing control arrangement
GB964865A (en) Improvements in or relating to automatic telephone systems
GB1030823A (en) Improvements in or relating to tele-communications exchange systems