FR714679A - Improvements to automatic or semi-automatic central office telephone systems - Google Patents

Improvements to automatic or semi-automatic central office telephone systems

Info

Publication number
FR714679A
FR714679A FR714679DA FR714679A FR 714679 A FR714679 A FR 714679A FR 714679D A FR714679D A FR 714679DA FR 714679 A FR714679 A FR 714679A
Authority
FR
France
Prior art keywords
automatic
semi
central office
telephone systems
office telephone
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.)
Thales SA
Original Assignee
Le Materiel Telephonique Thomson CSF
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 Le Materiel Telephonique Thomson CSF filed Critical Le Materiel Telephonique Thomson CSF
Application granted granted Critical
Publication of FR714679A publication Critical patent/FR714679A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements
    • H04Q3/58—Arrangements providing connection between main exchange and sub-exchange or satellite
    • H04Q3/62—Arrangements providing connection between main exchange and sub-exchange or satellite for connecting to private branch exchanges

Landscapes

  • Physics & Mathematics (AREA)
  • Astronomy & Astrophysics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
FR714679D 1930-08-01 1930-08-01 Improvements to automatic or semi-automatic central office telephone systems Expired FR714679A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR714679T 1930-08-01

Publications (1)

Publication Number Publication Date
FR714679A true FR714679A (en) 1931-11-27

Family

ID=10363571

Family Applications (1)

Application Number Title Priority Date Filing Date
FR714679D Expired FR714679A (en) 1930-08-01 1930-08-01 Improvements to automatic or semi-automatic central office telephone systems

Country Status (1)

Country Link
FR (1) FR714679A (en)

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