BE874407A - DIGITAL MULTI-FREQUENCY SIGNALING RECEPTION SYSTEM - Google Patents

DIGITAL MULTI-FREQUENCY SIGNALING RECEPTION SYSTEM

Info

Publication number
BE874407A
BE874407A BE193659A BE193659A BE874407A BE 874407 A BE874407 A BE 874407A BE 193659 A BE193659 A BE 193659A BE 193659 A BE193659 A BE 193659A BE 874407 A BE874407 A BE 874407A
Authority
BE
Belgium
Prior art keywords
reception system
digital multi
frequency signaling
signaling reception
frequency
Prior art date
Application number
BE193659A
Other languages
French (fr)
Original Assignee
Nippon Telegraph & Telephone
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 Nippon Telegraph & Telephone filed Critical Nippon Telegraph & Telephone
Publication of BE874407A publication Critical patent/BE874407A/en

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

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Complex Calculations (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
BE193659A 1978-02-24 1979-02-23 DIGITAL MULTI-FREQUENCY SIGNALING RECEPTION SYSTEM BE874407A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2075178A JPS54114022A (en) 1978-02-24 1978-02-24 Digital multi-frequency receiving system

Publications (1)

Publication Number Publication Date
BE874407A true BE874407A (en) 1979-06-18

Family

ID=12035883

Family Applications (1)

Application Number Title Priority Date Filing Date
BE193659A BE874407A (en) 1978-02-24 1979-02-23 DIGITAL MULTI-FREQUENCY SIGNALING RECEPTION SYSTEM

Country Status (2)

Country Link
JP (1) JPS54114022A (en)
BE (1) BE874407A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6041387A (en) * 1983-08-17 1985-03-05 Nec Corp Signal processing device

Also Published As

Publication number Publication date
JPS54114022A (en) 1979-09-05
JPH0526400B2 (en) 1993-04-15

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Legal Events

Date Code Title Description
RE Patent lapsed

Owner name: NIPPON TELEGRAPH AND TELEPHONE CORP.

Effective date: 19900228