FR20783E - Improvements to automatic telephone systems - Google Patents

Improvements to automatic telephone systems

Info

Publication number
FR20783E
FR20783E FR20783A FR20783DA FR20783E FR 20783 E FR20783 E FR 20783E FR 20783 A FR20783 A FR 20783A FR 20783D A FR20783D A FR 20783DA FR 20783 E FR20783 E FR 20783E
Authority
FR
France
Prior art keywords
telephone systems
automatic telephone
automatic
systems
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
FR20783A
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.)
Compagnie Francaise Thomson Houston SA
Original Assignee
Compagnie Francaise Thomson Houston 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.)
Publication date
Application granted granted Critical
Publication of FR20783E publication Critical patent/FR20783E/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)
  • Monitoring And Testing Of Exchanges (AREA)
FR20783A 1917-02-14 Improvements to automatic telephone systems Expired FR20783E (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US148478A US1347584A (en) 1917-02-14 1917-02-14 Automatic telephone system

Publications (1)

Publication Number Publication Date
FR20783E true FR20783E (en) 1919-06-14

Family

ID=22525959

Family Applications (2)

Application Number Title Priority Date Filing Date
FR20783A Expired FR20783E (en) 1917-02-14 Improvements to automatic telephone systems
FR489436A Expired FR489436A (en) 1917-02-14 1918-02-08 Improvements to automatic telephone systems

Family Applications After (1)

Application Number Title Priority Date Filing Date
FR489436A Expired FR489436A (en) 1917-02-14 1918-02-08 Improvements to automatic telephone systems

Country Status (2)

Country Link
US (1) US1347584A (en)
FR (2) FR489436A (en)

Also Published As

Publication number Publication date
US1347584A (en) 1920-07-27
FR489436A (en) 1919-02-03

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