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AU8658275A - Electronic switch circuit - Google Patents

Electronic switch circuit

Info

Publication number
AU8658275A
AU8658275A AU86582/75A AU8658275A AU8658275A AU 8658275 A AU8658275 A AU 8658275A AU 86582/75 A AU86582/75 A AU 86582/75A AU 8658275 A AU8658275 A AU 8658275A AU 8658275 A AU8658275 A AU 8658275A
Authority
AU
Australia
Prior art keywords
switch circuit
electronic switch
electronic
circuit
switch
Prior art date
Legal status (The legal status 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 status listed.)
Expired
Application number
AU86582/75A
Other versions
AU503304B2 (en
Inventor
Ea. King J Truell
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
International Standard Electric Corp
Original Assignee
International 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 International Standard Electric Corp filed Critical International Standard Electric Corp
Publication of AU8658275A publication Critical patent/AU8658275A/en
Application granted granted Critical
Publication of AU503304B2 publication Critical patent/AU503304B2/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M17/00—Prepayment of wireline communication systems, wireless communication systems or telephone systems
    • H04M17/02—Coin-freed or check-freed systems, e.g. mobile- or card-operated phones, public telephones or booths
    • H04M17/023—Circuit arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/66—Substation equipment, e.g. for use by subscribers with means for preventing unauthorised or fraudulent calling
    • H04M1/677—Preventing the dialling or sending of predetermined telephone numbers or selected types of telephone numbers, e.g. long distance numbers

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Interface Circuits In Exchanges (AREA)
  • Devices For Supply Of Signal Current (AREA)
AU86582/75A 1974-11-21 1975-11-13 Electronic switch circuit Expired AU503304B2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB5048374A GB1461015A (en) 1974-11-21 1974-11-21 Electronic switch circuits
GBGB50483/74 1974-11-21

Publications (2)

Publication Number Publication Date
AU8658275A true AU8658275A (en) 1977-05-19
AU503304B2 AU503304B2 (en) 1979-08-30

Family

ID=10456057

Family Applications (1)

Application Number Title Priority Date Filing Date
AU86582/75A Expired AU503304B2 (en) 1974-11-21 1975-11-13 Electronic switch circuit

Country Status (2)

Country Link
AU (1) AU503304B2 (en)
GB (1) GB1461015A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE897772A (en) * 1983-09-19 1984-03-19 Itt Ind Belgium ELECTRONIC CONTACTS AND RELATED DEVICES

Also Published As

Publication number Publication date
AU503304B2 (en) 1979-08-30
GB1461015A (en) 1977-01-13

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