FR336560A - Autocommutateur téléphonique - Google Patents

Autocommutateur téléphonique

Info

Publication number
FR336560A
FR336560A FR336560A FR336560DA FR336560A FR 336560 A FR336560 A FR 336560A FR 336560 A FR336560 A FR 336560A FR 336560D A FR336560D A FR 336560DA FR 336560 A FR336560 A FR 336560A
Authority
FR
France
Prior art keywords
pbx
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
FR336560A
Other languages
English (en)
Inventor
Bernhard Kugelmann
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Application granted granted Critical
Publication of FR336560A publication Critical patent/FR336560A/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
    • 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
    • H04Q1/38—Signalling arrangements; Manipulation of signalling currents using combinations of direct currents of different amplitudes or polarities over line conductors or combination of line conductors

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Sub-Exchange Stations And Push- Button Telephones (AREA)
FR336560A 1903-02-21 1903-10-01 Autocommutateur téléphonique Expired FR336560A (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE156334T 1903-02-21
FR336560T 1903-10-01

Publications (1)

Publication Number Publication Date
FR336560A true FR336560A (fr) 1904-03-12

Family

ID=40445553

Family Applications (1)

Application Number Title Priority Date Filing Date
FR336560A Expired FR336560A (fr) 1903-02-21 1903-10-01 Autocommutateur téléphonique

Country Status (2)

Country Link
DE (1) DE156334C (fr)
FR (1) FR336560A (fr)

Also Published As

Publication number Publication date
DE156334C (de) 1904-10-29

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