FR2368843B1 - - Google Patents

Info

Publication number
FR2368843B1
FR2368843B1 FR7631827A FR7631827A FR2368843B1 FR 2368843 B1 FR2368843 B1 FR 2368843B1 FR 7631827 A FR7631827 A FR 7631827A FR 7631827 A FR7631827 A FR 7631827A FR 2368843 B1 FR2368843 B1 FR 2368843B1
Authority
FR
France
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
FR7631827A
Other languages
French (fr)
Other versions
FR2368843A1 (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.)
Constr Telephoniques
Original Assignee
Constr Telephoniques
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 Constr Telephoniques filed Critical Constr Telephoniques
Priority to FR7631827A priority Critical patent/FR2368843A1/fr
Publication of FR2368843A1 publication Critical patent/FR2368843A1/fr
Application granted granted Critical
Publication of FR2368843B1 publication Critical patent/FR2368843B1/fr
Granted 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
    • H04Q1/45—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
    • 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
    • H04M1/30—Devices which can set up and transmit only one digit at a time
    • H04M1/50—Devices which can set up and transmit only one digit at a time by generating or selecting currents of predetermined frequencies or combinations of frequencies
    • H04M1/505—Devices which can set up and transmit only one digit at a time by generating or selecting currents of predetermined frequencies or combinations of frequencies signals generated in digital form

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Meter Arrangements (AREA)
  • Interface Circuits In Exchanges (AREA)
FR7631827A 1976-10-22 1976-10-22 Emetteur de signaux multifrequences Granted FR2368843A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7631827A FR2368843A1 (fr) 1976-10-22 1976-10-22 Emetteur de signaux multifrequences

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7631827A FR2368843A1 (fr) 1976-10-22 1976-10-22 Emetteur de signaux multifrequences

Publications (2)

Publication Number Publication Date
FR2368843A1 FR2368843A1 (fr) 1978-05-19
FR2368843B1 true FR2368843B1 (ja) 1982-07-23

Family

ID=9179084

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7631827A Granted FR2368843A1 (fr) 1976-10-22 1976-10-22 Emetteur de signaux multifrequences

Country Status (1)

Country Link
FR (1) FR2368843A1 (ja)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL8301366A (nl) * 1983-04-19 1984-11-16 Philips Nv Transmissieschakeling voor een dtmf-telefoontoestel.
DE3483095D1 (de) * 1983-12-26 1990-10-04 Toshiba Kawasaki Kk Vorrichtung zum erzeugen von dtmf-signalen.

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3946164A (en) * 1974-05-28 1976-03-23 Gte Automatic Electric Laboratories Incorporated Precise tone signal generator

Also Published As

Publication number Publication date
FR2368843A1 (fr) 1978-05-19

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Legal Events

Date Code Title Description
TP Transmission of property