FR649430A - Improvements to automatic or semi-automatic telephone systems - Google Patents

Improvements to automatic or semi-automatic telephone systems

Info

Publication number
FR649430A
FR649430A FR649430DA FR649430A FR 649430 A FR649430 A FR 649430A FR 649430D A FR649430D A FR 649430DA FR 649430 A FR649430 A FR 649430A
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 FR649430A publication Critical patent/FR649430A/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

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)
  • Monitoring And Testing Of Exchanges (AREA)
FR649430D 1927-10-26 1928-01-27 Improvements to automatic or semi-automatic telephone systems Expired FR649430A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2846027A GB304813A (en) 1927-10-26 1927-10-26 Improvements in automatic or semi-automatic telephone systems

Publications (1)

Publication Number Publication Date
FR649430A true FR649430A (en) 1928-12-21

Family

ID=10275969

Family Applications (1)

Application Number Title Priority Date Filing Date
FR649430D Expired FR649430A (en) 1927-10-26 1928-01-27 Improvements to automatic or semi-automatic telephone systems

Country Status (2)

Country Link
FR (1) FR649430A (en)
GB (1) GB304813A (en)

Also Published As

Publication number Publication date
GB304813A (en) 1929-01-28

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