FR580362A - Improvements to telephone systems for central offices - Google Patents

Improvements to telephone systems for central offices

Info

Publication number
FR580362A
FR580362A FR580362DA FR580362A FR 580362 A FR580362 A FR 580362A FR 580362D A FR580362D A FR 580362DA FR 580362 A FR580362 A FR 580362A
Authority
FR
France
Prior art keywords
telephone systems
central offices
offices
central
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 FR580362A publication Critical patent/FR580362A/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)
  • Sub-Exchange Stations And Push- Button Telephones (AREA)
FR580362D 1923-12-21 1924-03-17 Improvements to telephone systems for central offices Expired FR580362A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3206223A GB234151A (en) 1923-12-21 1923-12-21 Improvements in or relating to telephone systems

Publications (1)

Publication Number Publication Date
FR580362A true FR580362A (en) 1924-11-05

Family

ID=10332582

Family Applications (1)

Application Number Title Priority Date Filing Date
FR580362D Expired FR580362A (en) 1923-12-21 1924-03-17 Improvements to telephone systems for central offices

Country Status (2)

Country Link
FR (1) FR580362A (en)
GB (1) GB234151A (en)

Also Published As

Publication number Publication date
GB234151A (en) 1925-05-21

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