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ZA732618B - Improvements in or relating to transmission systems - Google Patents

Improvements in or relating to transmission systems

Info

Publication number
ZA732618B
ZA732618B ZA732618A ZA732618A ZA732618B ZA 732618 B ZA732618 B ZA 732618B ZA 732618 A ZA732618 A ZA 732618A ZA 732618 A ZA732618 A ZA 732618A ZA 732618 B ZA732618 B ZA 732618B
Authority
ZA
South Africa
Prior art keywords
relating
transmission systems
systems
transmission
Prior art date
Application number
ZA732618A
Inventor
R Heyes
R Buchanan
Original Assignee
Standard Telephones Cables 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 Standard Telephones Cables Ltd filed Critical Standard Telephones Cables Ltd
Publication of ZA732618B publication Critical patent/ZA732618B/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/40—Monitoring; Testing of relay systems
    • H04B17/401—Monitoring; Testing of relay systems with selective localization
    • H04B17/402—Monitoring; Testing of relay systems with selective localization using different frequencies
    • H04B17/403—Monitoring; Testing of relay systems with selective localization using different frequencies generated by local oscillators

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Monitoring And Testing Of Transmission In General (AREA)
ZA732618A 1972-05-25 1973-04-17 Improvements in or relating to transmission systems ZA732618B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2469072A GB1381554A (en) 1972-05-25 1972-05-25 Transmission systems

Publications (1)

Publication Number Publication Date
ZA732618B true ZA732618B (en) 1974-04-24

Family

ID=10215740

Family Applications (1)

Application Number Title Priority Date Filing Date
ZA732618A ZA732618B (en) 1972-05-25 1973-04-17 Improvements in or relating to transmission systems

Country Status (4)

Country Link
ES (1) ES415180A1 (en)
FR (1) FR2185902B1 (en)
GB (1) GB1381554A (en)
ZA (1) ZA732618B (en)

Also Published As

Publication number Publication date
AU5530673A (en) 1974-11-07
FR2185902B1 (en) 1978-01-06
FR2185902A1 (en) 1974-01-04
GB1381554A (en) 1975-01-22
ES415180A1 (en) 1976-02-01

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