ZA752926B - A house exchange telephone system - Google Patents

A house exchange telephone system

Info

Publication number
ZA752926B
ZA752926B ZA00752926A ZA752926A ZA752926B ZA 752926 B ZA752926 B ZA 752926B ZA 00752926 A ZA00752926 A ZA 00752926A ZA 752926 A ZA752926 A ZA 752926A ZA 752926 B ZA752926 B ZA 752926B
Authority
ZA
South Africa
Prior art keywords
telephone system
exchange telephone
house exchange
house
telephone
Prior art date
Application number
ZA00752926A
Inventor
C Perkins
D Harrison
F Wood
Original Assignee
Plessey Handel Investment Ag
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 Plessey Handel Investment Ag filed Critical Plessey Handel Investment Ag
Publication of ZA752926B publication Critical patent/ZA752926B/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M9/00—Arrangements for interconnection not involving centralised switching
    • H04M9/002—Arrangements for interconnection not involving centralised switching with subscriber controlled access to a line, i.e. key telephone systems
    • H04M9/005—Arrangements for interconnection not involving centralised switching with subscriber controlled access to a line, i.e. key telephone systems with subscriber controlled access to an exchange line
    • H04M9/007—Arrangements for interconnection not involving centralised switching with subscriber controlled access to a line, i.e. key telephone systems with subscriber controlled access to an exchange line wherein the key telephone sets are star-connected to a central unit by a limited number of lines

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Sub-Exchange Stations And Push- Button Telephones (AREA)
ZA00752926A 1974-05-30 1975-05-06 A house exchange telephone system ZA752926B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2536974A GB1464615A (en) 1974-05-30 1974-05-30 House-exchange telephone system

Publications (1)

Publication Number Publication Date
ZA752926B true ZA752926B (en) 1976-04-28

Family

ID=10226565

Family Applications (1)

Application Number Title Priority Date Filing Date
ZA00752926A ZA752926B (en) 1974-05-30 1975-05-06 A house exchange telephone system

Country Status (5)

Country Link
AU (1) AU499499B2 (en)
GB (1) GB1464615A (en)
HK (1) HK52577A (en)
MY (1) MY7800050A (en)
ZA (1) ZA752926B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113794130A (en) * 2021-09-08 2021-12-14 广东电网有限责任公司 DC system expansion device

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IL59950A (en) * 1979-05-04 1983-05-15 Gen Electric Co Ltd P.a.b.x.telephone systems with external extension adaptor
DE3037361C2 (en) * 1980-09-30 1983-11-10 Siemens AG, 1000 Berlin und 8000 München Circuit arrangement for centrally controlled telephone systems, in particular telephone extension systems and private special telephone systems, with user station and / or switching center-oriented operational readiness display means
DE4334906C2 (en) * 1993-10-13 1997-05-07 Neumann Elektronik Gmbh Device for the transmission of call and occupancy status signals from two-way or intercom systems with line selection via a two-wire transmission line

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113794130A (en) * 2021-09-08 2021-12-14 广东电网有限责任公司 DC system expansion device

Also Published As

Publication number Publication date
AU8127175A (en) 1976-11-25
AU499499B2 (en) 1979-04-26
GB1464615A (en) 1977-02-16
HK52577A (en) 1977-10-20
MY7800050A (en) 1978-12-31

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