FR864742A - Central office telecommunication systems - Google Patents

Central office telecommunication systems

Info

Publication number
FR864742A
FR864742A FR864742DA FR864742A FR 864742 A FR864742 A FR 864742A FR 864742D A FR864742D A FR 864742DA FR 864742 A FR864742 A FR 864742A
Authority
FR
France
Prior art keywords
central office
telecommunication systems
office telecommunication
systems
central
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 FR864742A publication Critical patent/FR864742A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M15/00—Arrangements for metering, time-control or time indication ; Metering, charging or billing arrangements for voice wireline or wireless communications, e.g. VoIP
    • H04M15/04—Recording calls, or communications in printed, perforated or other permanent form

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Exchange Systems With Centralized Control (AREA)
  • Sub-Exchange Stations And Push- Button Telephones (AREA)
FR864742D 1939-04-22 1940-04-10 Central office telecommunication systems Expired FR864742A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB219019X 1939-04-22

Publications (1)

Publication Number Publication Date
FR864742A true FR864742A (en) 1941-05-03

Family

ID=10170718

Family Applications (1)

Application Number Title Priority Date Filing Date
FR864742D Expired FR864742A (en) 1939-04-22 1940-04-10 Central office telecommunication systems

Country Status (4)

Country Link
BE (1) BE438722A (en)
CH (1) CH219019A (en)
FR (1) FR864742A (en)
GB (1) GB528193A (en)

Also Published As

Publication number Publication date
BE438722A (en)
GB528193A (en) 1940-10-24
CH219019A (en) 1942-01-15

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