HK23178A - Improvements in or relating to telephone exhanges - Google Patents

Improvements in or relating to telephone exhanges

Info

Publication number
HK23178A
HK23178A HK231/78A HK23178A HK23178A HK 23178 A HK23178 A HK 23178A HK 231/78 A HK231/78 A HK 231/78A HK 23178 A HK23178 A HK 23178A HK 23178 A HK23178 A HK 23178A
Authority
HK
Hong Kong
Prior art keywords
exhanges
telephone
relating
telephone exhanges
Prior art date
Application number
HK231/78A
Inventor
I Ch Hall
J A B King
H Ch Day
C Slatter
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 HK23178A publication Critical patent/HK23178A/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)
HK231/78A 1974-01-31 1978-05-04 Improvements in or relating to telephone exhanges HK23178A (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
HK23178A true HK23178A (en) 1978-05-12

Family

ID=9779584

Family Applications (1)

Application Number Title Priority Date Filing Date
HK231/78A HK23178A (en) 1974-01-31 1978-05-04 Improvements in or relating to telephone exhanges

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
IE40933L (en) 1975-07-31
AU7697974A (en) 1976-07-01
IE40933B1 (en) 1979-09-12
GB1446691A (en) 1976-08-18
ZA747537B (en) 1975-12-31

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