ZA73305B - Improvements in or relating to electric circuits for telephone instruments - Google Patents

Improvements in or relating to electric circuits for telephone instruments

Info

Publication number
ZA73305B
ZA73305B ZA730305A ZA73305A ZA73305B ZA 73305 B ZA73305 B ZA 73305B ZA 730305 A ZA730305 A ZA 730305A ZA 73305 A ZA73305 A ZA 73305A ZA 73305 B ZA73305 B ZA 73305B
Authority
ZA
South Africa
Prior art keywords
relating
electric circuits
telephone instruments
instruments
telephone
Prior art date
Application number
ZA730305A
Other languages
English (en)
Inventor
C Haworth
Original Assignee
Gen Electric Co 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 Gen Electric Co Ltd filed Critical Gen Electric Co Ltd
Publication of ZA73305B publication Critical patent/ZA73305B/xx

Links

Classifications

    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Devices For Supply Of Signal Current (AREA)
ZA730305A 1972-02-08 1973-01-16 Improvements in or relating to electric circuits for telephone instruments ZA73305B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB585172A GB1370956A (en) 1972-02-08 1972-02-08 Electric circuits for telephone instruments

Publications (1)

Publication Number Publication Date
ZA73305B true ZA73305B (en) 1973-10-31

Family

ID=9803826

Family Applications (1)

Application Number Title Priority Date Filing Date
ZA730305A ZA73305B (en) 1972-02-08 1973-01-16 Improvements in or relating to electric circuits for telephone instruments

Country Status (4)

Country Link
AU (1) AU473616B2 (it)
GB (1) GB1370956A (it)
IT (1) IT977696B (it)
ZA (1) ZA73305B (it)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4064366A (en) * 1976-01-15 1977-12-20 Winster Engineering Group Limited Intrinsically safe telephone systems
US4691344A (en) * 1986-01-21 1987-09-01 Aquatrol Corporation Low-powered remote sensor and telephone line transmitter
US4893332A (en) * 1986-05-12 1990-01-09 Aquatrol Corporation Low-powered remote sensor
DE19619610A1 (de) * 1996-05-15 1997-11-20 Bosch Gmbh Robert Fernsprechendgerät

Also Published As

Publication number Publication date
GB1370956A (en) 1974-10-16
IT977696B (it) 1974-09-20
AU473616B2 (en) 1976-06-24
AU5113673A (en) 1974-07-18

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