JPS535002B2 - - Google Patents

Info

Publication number
JPS535002B2
JPS535002B2 JP7759772A JP7759772A JPS535002B2 JP S535002 B2 JPS535002 B2 JP S535002B2 JP 7759772 A JP7759772 A JP 7759772A JP 7759772 A JP7759772 A JP 7759772A JP S535002 B2 JPS535002 B2 JP S535002B2
Authority
JP
Japan
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
JP7759772A
Other languages
Japanese (ja)
Other versions
JPS4831808A (enrdf_load_stackoverflow
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 filed Critical
Publication of JPS4831808A publication Critical patent/JPS4831808A/ja
Publication of JPS535002B2 publication Critical patent/JPS535002B2/ja
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)
JP7759772A 1971-08-27 1972-08-01 Expired JPS535002B2 (enrdf_load_stackoverflow)

Applications Claiming Priority (1)

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

Publications (2)

Publication Number Publication Date
JPS4831808A JPS4831808A (enrdf_load_stackoverflow) 1973-04-26
JPS535002B2 true JPS535002B2 (enrdf_load_stackoverflow) 1978-02-23

Family

ID=22640563

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7759772A Expired JPS535002B2 (enrdf_load_stackoverflow) 1971-08-27 1972-08-01

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)

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 (enrdf_load_stackoverflow) 1973-04-20
GB1378818A (en) 1974-12-27
BE782055A (fr) 1972-07-31
JPS4831808A (enrdf_load_stackoverflow) 1973-04-26

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