GB633112A - Improvements in or relating to telecommunication exchange systems - Google Patents

Improvements in or relating to telecommunication exchange systems

Info

Publication number
GB633112A
GB633112A GB1145447A GB1145447A GB633112A GB 633112 A GB633112 A GB 633112A GB 1145447 A GB1145447 A GB 1145447A GB 1145447 A GB1145447 A GB 1145447A GB 633112 A GB633112 A GB 633112A
Authority
GB
United Kingdom
Prior art keywords
relay
digit
marked
switch
operated
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
GB1145447A
Other languages
English (en)
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
Priority to BE482465D priority Critical patent/BE482465A/xx
Application filed by Standard Telephone and Cables PLC filed Critical Standard Telephone and Cables PLC
Priority to GB1145447A priority patent/GB633112A/en
Publication of GB633112A publication Critical patent/GB633112A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/40—Applications of speech amplifiers

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
GB1145447A 1947-04-29 1947-04-29 Improvements in or relating to telecommunication exchange systems Expired GB633112A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
BE482465D BE482465A (en:Method) 1947-04-29
GB1145447A GB633112A (en) 1947-04-29 1947-04-29 Improvements in or relating to telecommunication exchange systems

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1145447A GB633112A (en) 1947-04-29 1947-04-29 Improvements in or relating to telecommunication exchange systems

Publications (1)

Publication Number Publication Date
GB633112A true GB633112A (en) 1949-12-12

Family

ID=9986554

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1145447A Expired GB633112A (en) 1947-04-29 1947-04-29 Improvements in or relating to telecommunication exchange systems

Country Status (2)

Country Link
BE (1) BE482465A (en:Method)
GB (1) GB633112A (en:Method)

Also Published As

Publication number Publication date
BE482465A (en:Method)

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