SE7803253L - NUMBER PROTECTED FREQUENCY SELECTIVE RECEIVER - Google Patents

NUMBER PROTECTED FREQUENCY SELECTIVE RECEIVER

Info

Publication number
SE7803253L
SE7803253L SE7803253A SE7803253A SE7803253L SE 7803253 L SE7803253 L SE 7803253L SE 7803253 A SE7803253 A SE 7803253A SE 7803253 A SE7803253 A SE 7803253A SE 7803253 L SE7803253 L SE 7803253L
Authority
SE
Sweden
Prior art keywords
frequency selective
selective receiver
protected frequency
number protected
receiver
Prior art date
Application number
SE7803253A
Other languages
Swedish (sv)
Inventor
R Ast
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 SE7803253L publication Critical patent/SE7803253L/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
SE7803253A 1977-03-23 1978-03-21 NUMBER PROTECTED FREQUENCY SELECTIVE RECEIVER SE7803253L (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 (1)

Publication Number Publication Date
SE7803253L true SE7803253L (en) 1978-09-24

Family

ID=6004476

Family Applications (1)

Application Number Title Priority Date Filing Date
SE7803253A SE7803253L (en) 1977-03-23 1978-03-21 NUMBER PROTECTED FREQUENCY SELECTIVE RECEIVER

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
IT7821481A0 (en) 1978-03-22
IT1093892B (en) 1985-07-26
DE2712831C3 (en) 1980-09-25
JPS53117903A (en) 1978-10-14
DE2712831A1 (en) 1978-10-05
FR2385283A1 (en) 1978-10-20
DE2712831B2 (en) 1980-01-24
NL7803090A (en) 1978-09-26

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