FR926110A - Switching system improvements - Google Patents

Switching system improvements

Info

Publication number
FR926110A
FR926110A FR926110DA FR926110A FR 926110 A FR926110 A FR 926110A FR 926110D A FR926110D A FR 926110DA FR 926110 A FR926110 A FR 926110A
Authority
FR
France
Prior art keywords
switching system
system improvements
switching
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)
Inventor
Gerald Deakin
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.)
International Standard Electric Corp
Original Assignee
International Standard Electric 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 International Standard Electric Corp filed Critical International Standard Electric Corp
Application granted granted Critical
Publication of FR926110A publication Critical patent/FR926110A/en
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

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
FR926110D 1944-04-21 1946-04-27 Switching system improvements Expired FR926110A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US926110XA 1944-04-21 1944-04-21

Publications (1)

Publication Number Publication Date
FR926110A true FR926110A (en) 1947-09-23

Family

ID=22234109

Family Applications (1)

Application Number Title Priority Date Filing Date
FR926110D Expired FR926110A (en) 1944-04-21 1946-04-27 Switching system improvements

Country Status (1)

Country Link
FR (1) FR926110A (en)

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