FR722283A - Improvements to automatic or semi-automatic telephone systems - Google Patents

Improvements to automatic or semi-automatic telephone systems

Info

Publication number
FR722283A
FR722283A FR722283DA FR722283A FR 722283 A FR722283 A FR 722283A FR 722283D A FR722283D A FR 722283DA FR 722283 A FR722283 A FR 722283A
Authority
FR
France
Prior art keywords
automatic
semi
telephone systems
automatic 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.)
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 FR722283A publication Critical patent/FR722283A/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
    • H04Q3/625—Arrangements in the private branch exchange

Landscapes

  • Physics & Mathematics (AREA)
  • Astronomy & Astrophysics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
FR722283D 1930-11-21 1930-11-21 Improvements to automatic or semi-automatic telephone systems Expired FR722283A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR722283T 1930-11-21

Publications (1)

Publication Number Publication Date
FR722283A true FR722283A (en) 1932-03-15

Family

ID=9100732

Family Applications (1)

Application Number Title Priority Date Filing Date
FR722283D Expired FR722283A (en) 1930-11-21 1930-11-21 Improvements to automatic or semi-automatic telephone systems

Country Status (1)

Country Link
FR (1) FR722283A (en)

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