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ZA747537B - Improvements in or relating to telephone exchanges - Google Patents

Improvements in or relating to telephone exchanges

Info

Publication number
ZA747537B
ZA747537B ZA00747537A ZA747537A ZA747537B ZA 747537 B ZA747537 B ZA 747537B ZA 00747537 A ZA00747537 A ZA 00747537A ZA 747537 A ZA747537 A ZA 747537A ZA 747537 B ZA747537 B ZA 747537B
Authority
ZA
South Africa
Prior art keywords
relating
telephone exchanges
exchanges
telephone
Prior art date
Application number
ZA00747537A
Inventor
J King
H Day
R Slatter
I Hall
Original Assignee
Int Standard Electric Corp
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 Int Standard Electric Corp filed Critical Int Standard Electric Corp
Publication of ZA747537B publication Critical patent/ZA747537B/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements
    • H04Q3/58—Arrangements providing connection between main exchange and sub-exchange or satellite
    • H04Q3/62—Arrangements providing connection between main exchange and sub-exchange or satellite for connecting to private branch exchanges
    • H04Q3/625—Arrangements in the private branch exchange

Landscapes

  • Physics & Mathematics (AREA)
  • Astronomy & Astrophysics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Sub-Exchange Stations And Push- Button Telephones (AREA)
ZA00747537A 1974-01-31 1974-11-26 Improvements in or relating to telephone exchanges ZA747537B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB456774A GB1446691A (en) 1974-01-31 1974-01-31 Telephone exchanges

Publications (1)

Publication Number Publication Date
ZA747537B true ZA747537B (en) 1975-12-31

Family

ID=9779584

Family Applications (1)

Application Number Title Priority Date Filing Date
ZA00747537A ZA747537B (en) 1974-01-31 1974-11-26 Improvements in or relating to telephone exchanges

Country Status (5)

Country Link
AU (1) AU7697974A (en)
GB (1) GB1446691A (en)
HK (1) HK23178A (en)
IE (1) IE40933B1 (en)
ZA (1) ZA747537B (en)

Also Published As

Publication number Publication date
GB1446691A (en) 1976-08-18
HK23178A (en) 1978-05-12
AU7697974A (en) 1976-07-01
IE40933B1 (en) 1979-09-12
IE40933L (en) 1975-07-31

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