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FR607516A - Installations téléphoniques perfectionnées - Google Patents

Installations téléphoniques perfectionnées

Info

Publication number
FR607516A
FR607516A FR607516DA FR607516A FR 607516 A FR607516 A FR 607516A FR 607516D A FR607516D A FR 607516DA FR 607516 A FR607516 A FR 607516A
Authority
FR
France
Prior art keywords
telephone systems
sophisticated telephone
sophisticated
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
English (en)
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 FR607516A publication Critical patent/FR607516A/fr
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q1/00—Details of selecting apparatus or arrangements
    • H04Q1/18—Electrical details
    • H04Q1/30—Signalling arrangements; Manipulation of signalling currents
    • H04Q1/32—Signalling arrangements; Manipulation of signalling currents using trains of DC pulses

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Monitoring And Testing Of Exchanges (AREA)
  • Inspection Of Paper Currency And Valuable Securities (AREA)
  • Alarm Systems (AREA)
FR607516D 1924-12-09 1925-12-07 Installations téléphoniques perfectionnées Expired FR607516A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2959124A GB248826A (en) 1924-12-09 1924-12-09 Improvements in or relating to telephone systems

Publications (1)

Publication Number Publication Date
FR607516A true FR607516A (fr) 1926-07-03

Family

ID=10293949

Family Applications (1)

Application Number Title Priority Date Filing Date
FR607516D Expired FR607516A (fr) 1924-12-09 1925-12-07 Installations téléphoniques perfectionnées

Country Status (2)

Country Link
FR (1) FR607516A (fr)
GB (1) GB248826A (fr)

Also Published As

Publication number Publication date
GB248826A (en) 1926-03-09

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