FR834724A - Signaling device in telephone systems with automatic operation - Google Patents

Signaling device in telephone systems with automatic operation

Info

Publication number
FR834724A
FR834724A FR834724DA FR834724A FR 834724 A FR834724 A FR 834724A FR 834724D A FR834724D A FR 834724DA FR 834724 A FR834724 A FR 834724A
Authority
FR
France
Prior art keywords
automatic operation
signaling device
telephone systems
telephone
systems
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
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.)
Lignes Telegraphiques et Telephoniques LTT SA
Original Assignee
Lignes Telegraphiques et Telephoniques LTT SA
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 Lignes Telegraphiques et Telephoniques LTT SA filed Critical Lignes Telegraphiques et Telephoniques LTT SA
Application granted granted Critical
Publication of FR834724A publication Critical patent/FR834724A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q1/00—Details of selecting apparatus or arrangements
    • H04Q1/18—Electrical details
    • H04Q1/30—Signalling arrangements; Manipulation of signalling currents

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
FR834724D 1937-03-06 1938-03-03 Signaling device in telephone systems with automatic operation Expired FR834724A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE834724X 1937-03-06

Publications (1)

Publication Number Publication Date
FR834724A true FR834724A (en) 1938-11-30

Family

ID=6760718

Family Applications (1)

Application Number Title Priority Date Filing Date
FR834724D Expired FR834724A (en) 1937-03-06 1938-03-03 Signaling device in telephone systems with automatic operation

Country Status (1)

Country Link
FR (1) FR834724A (en)

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