FR2151815A5 - - Google Patents

Info

Publication number
FR2151815A5
FR2151815A5 FR7219139A FR7219139A FR2151815A5 FR 2151815 A5 FR2151815 A5 FR 2151815A5 FR 7219139 A FR7219139 A FR 7219139A FR 7219139 A FR7219139 A FR 7219139A FR 2151815 A5 FR2151815 A5 FR 2151815A5
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
FR7219139A
Other languages
French (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.)
Boeing North American Inc
Original Assignee
North American Rockwell 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 North American Rockwell Corp filed Critical North American Rockwell Corp
Application granted granted Critical
Publication of FR2151815A5 publication Critical patent/FR2151815A5/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
    • H04Q1/45—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)
FR7219139A 1971-08-27 1972-05-29 Expired FR2151815A5 (enrdf_load_stackoverflow)

Applications Claiming Priority (1)

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

Publications (1)

Publication Number Publication Date
FR2151815A5 true FR2151815A5 (enrdf_load_stackoverflow) 1973-04-20

Family

ID=22640563

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7219139A Expired FR2151815A5 (enrdf_load_stackoverflow) 1971-08-27 1972-05-29

Country Status (4)

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

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2280141A1 (fr) * 1974-07-26 1976-02-20 Materiel Telephonique Systeme de signalisation entre centres de traitement d'informations

Families Citing this family (4)

* 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
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

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2280141A1 (fr) * 1974-07-26 1976-02-20 Materiel Telephonique Systeme de signalisation entre centres de traitement d'informations

Also Published As

Publication number Publication date
JPS4831808A (enrdf_load_stackoverflow) 1973-04-26
BE782055A (fr) 1972-07-31
GB1378818A (en) 1974-12-27
JPS535002B2 (enrdf_load_stackoverflow) 1978-02-23

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