FR1137279A - Installations de télécommunication en particulier dans les installations téléphoniques - Google Patents

Installations de télécommunication en particulier dans les installations téléphoniques

Info

Publication number
FR1137279A
FR1137279A FR1137279DA FR1137279A FR 1137279 A FR1137279 A FR 1137279A FR 1137279D A FR1137279D A FR 1137279DA FR 1137279 A FR1137279 A FR 1137279A
Authority
FR
France
Prior art keywords
installations
telecommunications
telephone
telephone installations
telecommunications installations
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)
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.)
Siemens and Halske AG
Siemens Corp
Original Assignee
Siemens and Halske AG
Siemens Corp
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 Siemens and Halske AG, Siemens Corp filed Critical Siemens and Halske AG
Application granted granted Critical
Publication of FR1137279A publication Critical patent/FR1137279A/fr
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/26—Devices for calling a subscriber
    • H04M1/515—Devices for calling a subscriber by generating or selecting signals other than trains of pulses of similar shape, or signals other than currents of one or more different frequencies, e.g. generation of DC signals of alternating polarity, coded pulses or impedance dialling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Interface Circuits In Exchanges (AREA)
FR1137279D 1954-04-05 1955-03-26 Installations de télécommunication en particulier dans les installations téléphoniques Expired FR1137279A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE331074X 1954-04-05

Publications (1)

Publication Number Publication Date
FR1137279A true FR1137279A (fr) 1957-05-27

Family

ID=6194540

Family Applications (1)

Application Number Title Priority Date Filing Date
FR1137279D Expired FR1137279A (fr) 1954-04-05 1955-03-26 Installations de télécommunication en particulier dans les installations téléphoniques

Country Status (4)

Country Link
BE (1) BE536547A (member.php)
CH (1) CH331074A (member.php)
FR (1) FR1137279A (member.php)
GB (1) GB783637A (member.php)

Also Published As

Publication number Publication date
BE536547A (member.php)
GB783637A (en) 1957-09-25
CH331074A (de) 1958-06-30

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