FR1375267A - Electronic call system - Google Patents

Electronic call system

Info

Publication number
FR1375267A
FR1375267A FR947131A FR947131A FR1375267A FR 1375267 A FR1375267 A FR 1375267A FR 947131 A FR947131 A FR 947131A FR 947131 A FR947131 A FR 947131A FR 1375267 A FR1375267 A FR 1375267A
Authority
FR
France
Prior art keywords
call system
electronic call
electronic
call
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
FR947131A
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.)
Automatic Electric Laboratories Inc
Original Assignee
Automatic Electric Laboratories Inc
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
Priority claimed from US223897A external-priority patent/US3218395A/en
Application filed by Automatic Electric Laboratories Inc filed Critical Automatic Electric Laboratories Inc
Priority to FR947131A priority Critical patent/FR1375267A/en
Application granted granted Critical
Publication of FR1375267A publication Critical patent/FR1375267A/en
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
FR947131A 1962-09-17 1963-09-11 Electronic call system Expired FR1375267A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR947131A FR1375267A (en) 1962-09-17 1963-09-11 Electronic call system

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US223897A US3218395A (en) 1962-09-17 1962-09-17 Electronic signaling arrangement
FR947131A FR1375267A (en) 1962-09-17 1963-09-11 Electronic call system

Publications (1)

Publication Number Publication Date
FR1375267A true FR1375267A (en) 1964-10-16

Family

ID=26203305

Family Applications (1)

Application Number Title Priority Date Filing Date
FR947131A Expired FR1375267A (en) 1962-09-17 1963-09-11 Electronic call system

Country Status (1)

Country Link
FR (1) FR1375267A (en)

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