FR75213E - Voice frequency receivers - Google Patents

Voice frequency receivers

Info

Publication number
FR75213E
FR75213E FR770718A FR770718A FR75213E FR 75213 E FR75213 E FR 75213E FR 770718 A FR770718 A FR 770718A FR 770718 A FR770718 A FR 770718A FR 75213 E FR75213 E FR 75213E
Authority
FR
France
Prior art keywords
voice frequency
frequency receivers
receivers
voice
frequency
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
FR770718A
Other languages
French (fr)
Inventor
Jean-Victor Martens
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
Priority to FR770718A priority Critical patent/FR75213E/en
Application granted granted Critical
Publication of FR75213E publication Critical patent/FR75213E/en
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
    • H04Q1/44—Signalling arrangements; Manipulation of signalling currents using alternate current
    • H04Q1/444—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies
    • H04Q1/446—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using one signalling frequency
    • H04Q1/4465—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using one signalling frequency the same frequency being used for all signalling information, e.g. A.C. nr.9 system

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
FR770718A 1951-04-27 1958-07-21 Voice frequency receivers Expired FR75213E (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR770718A FR75213E (en) 1951-04-27 1958-07-21 Voice frequency receivers

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
NL160821 1951-04-27
NL219653 1957-08-06
FR770718A FR75213E (en) 1951-04-27 1958-07-21 Voice frequency receivers

Publications (1)

Publication Number Publication Date
FR75213E true FR75213E (en) 1961-05-12

Family

ID=27245183

Family Applications (1)

Application Number Title Priority Date Filing Date
FR770718A Expired FR75213E (en) 1951-04-27 1958-07-21 Voice frequency receivers

Country Status (1)

Country Link
FR (1) FR75213E (en)

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