AU2394077A - Push-button telephones - Google Patents

Push-button telephones

Info

Publication number
AU2394077A
AU2394077A AU23940/77A AU2394077A AU2394077A AU 2394077 A AU2394077 A AU 2394077A AU 23940/77 A AU23940/77 A AU 23940/77A AU 2394077 A AU2394077 A AU 2394077A AU 2394077 A AU2394077 A AU 2394077A
Authority
AU
Australia
Prior art keywords
push
button telephones
telephones
button
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
AU23940/77A
Inventor
Gerhard Binder
Heinz Wiedmann
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 AU2394077A publication Critical patent/AU2394077A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/26—Devices for calling a subscriber
    • H04M1/30—Devices which can set up and transmit only one digit at a time
    • H04M1/31—Devices which can set up and transmit only one digit at a time by interrupting current to generate trains of pulses; by periodically opening and closing contacts to generate trains of pulses
    • H04M1/312—Devices which can set up and transmit only one digit at a time by interrupting current to generate trains of pulses; by periodically opening and closing contacts to generate trains of pulses pulses produced by electronic circuits

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Interface Circuits In Exchanges (AREA)
AU23940/77A 1976-04-08 1977-04-04 Push-button telephones Expired AU2394077A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19762615337 DE2615337A1 (en) 1976-04-08 1976-04-08 Telephone instrument with dialling keyboard - has dialling pulse relay terminating line loop with resistor ensuring reliable loop state recognition

Publications (1)

Publication Number Publication Date
AU2394077A true AU2394077A (en) 1978-10-12

Family

ID=5974856

Family Applications (1)

Application Number Title Priority Date Filing Date
AU23940/77A Expired AU2394077A (en) 1976-04-08 1977-04-04 Push-button telephones

Country Status (2)

Country Link
AU (1) AU2394077A (en)
DE (1) DE2615337A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0004901B1 (en) * 1978-04-14 1982-02-17 Siemens Aktiengesellschaft Circuit for subscriber stations with selecting means and current supply over the lines in telecommunication systems, especially telephone systems
IT1246719B (en) * 1990-11-15 1994-11-26 St Microelectronics Srl MONOLITHICALLY INTEGRABLE SWITCH WITH REDUCED POWER DISSIPATION, ESPECIALLY FOR TELEPHONE AND SIMILAR EQUIPMENT

Also Published As

Publication number Publication date
DE2615337A1 (en) 1977-10-27

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