FR620559A - Improvements to automatic telephone systems - Google Patents

Improvements to automatic telephone systems

Info

Publication number
FR620559A
FR620559A FR620559DA FR620559A FR 620559 A FR620559 A FR 620559A FR 620559D A FR620559D A FR 620559DA FR 620559 A FR620559 A FR 620559A
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
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 FR620559A publication Critical patent/FR620559A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M7/00—Arrangements for interconnection between switching centres
    • H04M7/08—Arrangements for interconnection between switching centres for phantom working

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
FR620559D 1926-08-23 1926-08-23 Improvements to automatic telephone systems Expired FR620559A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR620559T 1926-08-23

Publications (1)

Publication Number Publication Date
FR620559A true FR620559A (en) 1927-04-25

Family

ID=8984473

Family Applications (1)

Application Number Title Priority Date Filing Date
FR620559D Expired FR620559A (en) 1926-08-23 1926-08-23 Improvements to automatic telephone systems

Country Status (1)

Country Link
FR (1) FR620559A (en)

Similar Documents

Publication Publication Date Title
FR654067A (en) Improvements to automatic or semi-automatic telephone systems
FR631166A (en) Improvements to telephone systems
FR630110A (en) Improvements to telephone systems
FR683358A (en) Improvements to automatic telephone systems
FR625411A (en) Improvements to automatic telephone systems
FR620559A (en) Improvements to automatic telephone systems
FR629974A (en) Improvements to telephone systems
FR618492A (en) Improvements to telephone systems
FR644546A (en) Improvements to telephone systems
FR621655A (en) Improvements to telephone systems
FR641494A (en) Improvements to telephone systems
FR637230A (en) Improvements to telephone systems
FR636798A (en) Improvements to telephone systems
FR635618A (en) Improvements to telephone systems
FR634383A (en) Improvements to telephone systems
FR617640A (en) Improvements to telephone systems
FR629755A (en) Improvements to telephone systems
FR625597A (en) Improvements to telephone systems
FR622764A (en) Improvements to telephone systems
FR618825A (en) Improvements to telephone systems
FR617641A (en) Improvements to telephone systems
FR664216A (en) Improvements to telephone systems
FR646243A (en) Improvements to automatic telephone systems
FR655242A (en) Improvements to automatic telephone systems
FR620971A (en) Improvements to automatic telephone systems