FR75213E - Récepteurs à fréquences vocales - Google Patents

Récepteurs à fréquences vocales

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
English (en)
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
Priority claimed from NL160821A external-priority patent/NL81147C/nl
Application filed by International Standard Electric Corp filed Critical International Standard Electric Corp
Application granted granted Critical
Publication of FR75213E publication Critical patent/FR75213E/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
    • H04Q1/44—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
    • 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
    • H04Q1/442—Signalling arrangements; Manipulation of signalling currents using alternate current with out-of-voice band signalling frequencies
    • H04Q1/4423—Signalling arrangements; Manipulation of signalling currents using alternate current with out-of-voice band signalling frequencies using one signalling frequency
    • 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
    • H04Q1/45—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling
    • H04Q1/453—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling in which m-out-of-n signalling frequencies are transmitted

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Reduction Or Emphasis Of Bandwidth Of Signals (AREA)
  • Amplifiers (AREA)
  • Interface Circuits In Exchanges (AREA)
FR770718A 1951-04-27 1958-07-21 Récepteurs à fréquences vocales Expired FR75213E (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL160821A NL81147C (nl) 1951-04-27 1951-04-27 Ontvangstinrichting voor toonfrequentiesignalen
NL219653A NL93729C (nl) 1951-04-27 1957-08-06 Ontvanginrichting voor toonfrequentiesignalen

Publications (1)

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

Family

ID=26641579

Family Applications (1)

Application Number Title Priority Date Filing Date
FR770718A Expired FR75213E (fr) 1951-04-27 1958-07-21 Récepteurs à fréquences vocales

Country Status (5)

Country Link
BE (1) BE570041A (fr)
DE (1) DE1046116B (fr)
FR (1) FR75213E (fr)
GB (1) GB831713A (fr)
NL (1) NL93729C (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3103558A (en) * 1959-09-24 1963-09-10 Int Standard Electric Corp ligotky

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE745228C (de) * 1939-07-28 1944-03-01 Siemens Ag Elektrischer Signalempfaenger
DE856164C (de) * 1943-10-29 1952-11-20 Siemens Ag Elektrischer Signalempfaenger
DE899373C (de) * 1952-04-22 1953-12-10 Telefonbau & Normalzeit Gmbh Schaltungsanordnung zur Forttschaltung von den Teilnehmerleitungen zugeordneten Gebuehrenanzeigern
DE1013708B (de) 1955-12-22 1957-08-14 Siemens Ag Schaltungsanordnung zum Empfang von Signalspannungen

Also Published As

Publication number Publication date
NL93729C (nl) 1960-02-16
GB831713A (en) 1960-03-30
DE1046116B (de) 1958-12-11
BE570041A (nl) 1961-07-28

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