BE782055A - Generateur de signaux de tonalite numerique - Google Patents

Generateur de signaux de tonalite numerique

Info

Publication number
BE782055A
BE782055A BE782055A BE782055A BE782055A BE 782055 A BE782055 A BE 782055A BE 782055 A BE782055 A BE 782055A BE 782055 A BE782055 A BE 782055A BE 782055 A BE782055 A BE 782055A
Authority
BE
Belgium
Prior art keywords
signal generator
tone signal
digital tone
digital
generator
Prior art date
Application number
BE782055A
Other languages
English (en)
Inventor
J L Thomas
Original Assignee
North American Rockwell
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 North American Rockwell filed Critical North American Rockwell
Publication of BE782055A publication Critical patent/BE782055A/fr

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
    • H04Q1/457—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling with conversion of multifrequency signals into digital signals
    • H04Q1/4575—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling with conversion of multifrequency signals into digital signals which are transmitted in digital form

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Input From Keyboards Or The Like (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Devices For Supply Of Signal Current (AREA)
BE782055A 1971-08-27 1972-04-13 Generateur de signaux de tonalite numerique BE782055A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US17552471A 1971-08-27 1971-08-27

Publications (1)

Publication Number Publication Date
BE782055A true BE782055A (fr) 1972-07-31

Family

ID=22640563

Family Applications (1)

Application Number Title Priority Date Filing Date
BE782055A BE782055A (fr) 1971-08-27 1972-04-13 Generateur de signaux de tonalite numerique

Country Status (4)

Country Link
JP (1) JPS535002B2 (fr)
BE (1) BE782055A (fr)
FR (1) FR2151815A5 (fr)
GB (1) GB1378818A (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3941942A (en) * 1974-01-02 1976-03-02 Motorola, Inc. Two of eight tone encoder
FR2280141A1 (fr) * 1974-07-26 1976-02-20 Materiel Telephonique Systeme de signalisation entre centres de traitement d'informations
US4061886A (en) * 1975-09-29 1977-12-06 Mostek Corporation Dual tone multiple frequency generator
US4087638A (en) * 1976-10-01 1978-05-02 Telaris Telecommunications Inc. DTMF Communication system
JPS53145507A (en) * 1977-05-25 1978-12-18 Fujitsu Ltd Pb signal transmitting system

Also Published As

Publication number Publication date
FR2151815A5 (fr) 1973-04-20
GB1378818A (en) 1974-12-27
JPS4831808A (fr) 1973-04-26
JPS535002B2 (fr) 1978-02-23

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