ZA742307B - Improvements in or relating to circuit arrangements in telephone apparatus - Google Patents

Improvements in or relating to circuit arrangements in telephone apparatus

Info

Publication number
ZA742307B
ZA742307B ZA00742307A ZA742307A ZA742307B ZA 742307 B ZA742307 B ZA 742307B ZA 00742307 A ZA00742307 A ZA 00742307A ZA 742307 A ZA742307 A ZA 742307A ZA 742307 B ZA742307 B ZA 742307B
Authority
ZA
South Africa
Prior art keywords
relating
telephone apparatus
circuit arrangements
arrangements
circuit
Prior art date
Application number
ZA00742307A
Inventor
R Stevenson
D Connolly
P Hovland
Original Assignee
Gen Electric
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 Gen Electric filed Critical Gen Electric
Publication of ZA742307B publication Critical patent/ZA742307B/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/26—Devices for calling a subscriber
    • H04M1/30—Devices which can set up and transmit only one digit at a time
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M19/00—Current supply arrangements for telephone systems
    • H04M19/08—Current supply arrangements for telephone systems with current supply sources at the substations

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Emergency Protection Circuit Devices (AREA)
ZA00742307A 1973-04-10 1974-04-10 Improvements in or relating to circuit arrangements in telephone apparatus ZA742307B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1718373A GB1469103A (en) 1973-04-10 1973-04-10 Circuit arrangements in telephone apparatus

Publications (1)

Publication Number Publication Date
ZA742307B true ZA742307B (en) 1975-03-26

Family

ID=10090723

Family Applications (1)

Application Number Title Priority Date Filing Date
ZA00742307A ZA742307B (en) 1973-04-10 1974-04-10 Improvements in or relating to circuit arrangements in telephone apparatus

Country Status (2)

Country Link
GB (1) GB1469103A (en)
ZA (1) ZA742307B (en)

Also Published As

Publication number Publication date
GB1469103A (en) 1977-03-30

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