FR2147558A5 - - Google Patents

Info

Publication number
FR2147558A5
FR2147558A5 FR7206546A FR7206546A FR2147558A5 FR 2147558 A5 FR2147558 A5 FR 2147558A5 FR 7206546 A FR7206546 A FR 7206546A FR 7206546 A FR7206546 A FR 7206546A FR 2147558 A5 FR2147558 A5 FR 2147558A5
Authority
FR
France
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
FR7206546A
Other languages
French (fr)
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.)
Microsystems International Ltd
Original Assignee
Microsystems International 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 Microsystems International Ltd filed Critical Microsystems International Ltd
Application granted granted Critical
Publication of FR2147558A5 publication Critical patent/FR2147558A5/fr
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M19/00—Current supply arrangements for telephone systems
    • H04M19/02—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone
    • H04M19/04—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone the ringing-current being generated at the substations

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
FR7206546A 1971-07-29 1972-02-25 Expired FR2147558A5 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA119434A CA938039A (en) 1971-07-29 1971-07-29 Tone-generating circuit for energizing an electro-acoustic transducer

Publications (1)

Publication Number Publication Date
FR2147558A5 true FR2147558A5 (en) 1973-03-09

Family

ID=4090468

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7206546A Expired FR2147558A5 (en) 1971-07-29 1972-02-25

Country Status (4)

Country Link
BE (1) BE777618A (en)
CA (1) CA938039A (en)
FR (1) FR2147558A5 (en)
IT (1) IT947704B (en)

Also Published As

Publication number Publication date
IT947704B (en) 1973-05-30
BE777618A (en) 1972-04-17
CA938039A (en) 1973-12-04

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Legal Events

Date Code Title Description
ST Notification of lapse