FR500065A - Improvements to automatic telephone systems - Google Patents

Improvements to automatic telephone systems

Info

Publication number
FR500065A
FR500065A FR500065A FR500065DA FR500065A FR 500065 A FR500065 A FR 500065A FR 500065 A FR500065 A FR 500065A FR 500065D A FR500065D A FR 500065DA FR 500065 A FR500065 A FR 500065A
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
FR500065A
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.)
Filing date
Publication date
Application filed by Compagnie Francaise Thomson Houston SA filed Critical Compagnie Francaise Thomson Houston SA
Application granted granted Critical
Publication of FR500065A publication Critical patent/FR500065A/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)
  • Interface Circuits In Exchanges (AREA)
FR500065A 1917-10-13 1918-10-12 Improvements to automatic telephone systems Expired FR500065A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US120197XA 1917-10-13 1917-10-13

Publications (1)

Publication Number Publication Date
FR500065A true FR500065A (en) 1920-03-02

Family

ID=32391518

Family Applications (1)

Application Number Title Priority Date Filing Date
FR500065A Expired FR500065A (en) 1917-10-13 1918-10-12 Improvements to automatic telephone systems

Country Status (3)

Country Link
US (1) US1627929A (en)
FR (1) FR500065A (en)
GB (1) GB120197A (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE764328C (en) * 1933-12-09 1954-05-24 Mix & Genest A G Circuit arrangement for independent sub-exchanges with separate setting and speech paths and query facility
DE746315C (en) * 1934-06-22 1944-08-01 Normalzeit G M B H Circuit arrangement for telephone extension systems with dialer operation
US2567190A (en) * 1945-05-14 1951-09-11 Int Standard Electric Corp Telephone exchange system
US2761908A (en) * 1952-08-19 1956-09-04 Automatic Elect Lab Telephone system
US3041406A (en) * 1959-12-14 1962-06-26 Gen Dynamics Corp Inward dialing to private branch exchange

Also Published As

Publication number Publication date
US1627929A (en) 1927-05-10
GB120197A (en) 1919-06-26

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