IT7821481A0 - FREQUENCY SELECTIVE SIGNAL RECEIVER, PROTECTED FROM ACCIDENTAL OPERATION CAUSED BY THE VOICE. - Google Patents

FREQUENCY SELECTIVE SIGNAL RECEIVER, PROTECTED FROM ACCIDENTAL OPERATION CAUSED BY THE VOICE.

Info

Publication number
IT7821481A0
IT7821481A0 IT7821481A IT2148178A IT7821481A0 IT 7821481 A0 IT7821481 A0 IT 7821481A0 IT 7821481 A IT7821481 A IT 7821481A IT 2148178 A IT2148178 A IT 2148178A IT 7821481 A0 IT7821481 A0 IT 7821481A0
Authority
IT
Italy
Prior art keywords
voice
protected
signal receiver
frequency selective
operation caused
Prior art date
Application number
IT7821481A
Other languages
Italian (it)
Other versions
IT1093892B (en
Original Assignee
Siemens Ag
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 Siemens Ag filed Critical Siemens Ag
Publication of IT7821481A0 publication Critical patent/IT7821481A0/en
Application granted granted Critical
Publication of IT1093892B publication Critical patent/IT1093892B/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)
  • Dc Digital Transmission (AREA)
  • Radar Systems Or Details Thereof (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
IT21481/78A 1977-03-23 1978-03-22 FREQUENCY SELECTIVE SIGNAL RECEIVER, PROTECTED FROM ACCIDENTAL OPERATION CAUSED BY THE VCCE IT1093892B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2712831A DE2712831B2 (en) 1977-03-23 1977-03-23 Speech-protected, frequency-selective character receiver

Publications (2)

Publication Number Publication Date
IT7821481A0 true IT7821481A0 (en) 1978-03-22
IT1093892B IT1093892B (en) 1985-07-26

Family

ID=6004476

Family Applications (1)

Application Number Title Priority Date Filing Date
IT21481/78A IT1093892B (en) 1977-03-23 1978-03-22 FREQUENCY SELECTIVE SIGNAL RECEIVER, PROTECTED FROM ACCIDENTAL OPERATION CAUSED BY THE VCCE

Country Status (6)

Country Link
JP (1) JPS53117903A (en)
DE (1) DE2712831B2 (en)
FR (1) FR2385283A1 (en)
IT (1) IT1093892B (en)
NL (1) NL7803090A (en)
SE (1) SE7803253L (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IL64230A0 (en) * 1981-11-06 1982-02-28 Israel Electronics Corp Tone detector
DD259987A3 (en) * 1986-07-07 1988-09-14 Rft Nachrichtenelektronik Albe METHOD AND ARRANGEMENT FOR LANGUAGE PROTECTION IN MFC-TASTWAHLMPFAENGERN
DD266253A3 (en) * 1987-06-22 1989-03-29 Leipzig Rft Nachrichtenelekt UNIVERSAL DIGITAL MFC RECEPTIONER

Also Published As

Publication number Publication date
DE2712831B2 (en) 1980-01-24
FR2385283A1 (en) 1978-10-20
DE2712831A1 (en) 1978-10-05
JPS53117903A (en) 1978-10-14
IT1093892B (en) 1985-07-26
SE7803253L (en) 1978-09-24
NL7803090A (en) 1978-09-26
DE2712831C3 (en) 1980-09-25

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