FR621655A - Improvements to telephone systems - Google Patents

Improvements to telephone systems

Info

Publication number
FR621655A
FR621655A FR621655DA FR621655A FR 621655 A FR621655 A FR 621655A FR 621655D A FR621655D A FR 621655DA FR 621655 A FR621655 A FR 621655A
Authority
FR
France
Prior art keywords
telephone systems
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 FR621655A publication Critical patent/FR621655A/en
Expired legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04MTELEPHONIC COMMUNICATION
    • H04M7/00Arrangements for interconnection between switching centres
    • H04M7/08Arrangements for interconnection between switching centres for phantom working

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
FR621655D 1926-09-18 1926-09-18 Improvements to telephone systems Expired FR621655A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR621655T 1926-09-18

Publications (1)

Publication Number Publication Date
FR621655A true FR621655A (en) 1927-05-16

Family

ID=8985252

Family Applications (1)

Application Number Title Priority Date Filing Date
FR621655D Expired FR621655A (en) 1926-09-18 1926-09-18 Improvements to telephone systems

Country Status (1)

Country Link
FR (1) FR621655A (en)

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