BG49039A1 - Method and device for protection of speak signals in successors for selective type of multifrequency code - Google Patents

Method and device for protection of speak signals in successors for selective type of multifrequency code

Info

Publication number
BG49039A1
BG49039A1 BG8033187A BG8033187A BG49039A1 BG 49039 A1 BG49039 A1 BG 49039A1 BG 8033187 A BG8033187 A BG 8033187A BG 8033187 A BG8033187 A BG 8033187A BG 49039 A1 BG49039 A1 BG 49039A1
Authority
BG
Bulgaria
Prior art keywords
successors
speak
signals
protection
selective type
Prior art date
Application number
BG8033187A
Other languages
English (en)
Inventor
Peter Lenz
Johannes Schuchart
Original Assignee
Leipzig Rft Nachrichtenelekt
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 Leipzig Rft Nachrichtenelekt filed Critical Leipzig Rft Nachrichtenelekt
Publication of BG49039A1 publication Critical patent/BG49039A1/xx

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
    • H04Q1/46—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies comprising means for distinguishing between a signalling current of predetermined frequency and a complex current containing that frequency, e.g. speech current

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
BG8033187A 1986-07-07 1987-06-26 Method and device for protection of speak signals in successors for selective type of multifrequency code BG49039A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DD29222486A DD259987A3 (de) 1986-07-07 1986-07-07 Verfahren und anordnung zum sprachschutz in mfc-tastwahlempfaengern

Publications (1)

Publication Number Publication Date
BG49039A1 true BG49039A1 (en) 1991-07-15

Family

ID=5580693

Family Applications (1)

Application Number Title Priority Date Filing Date
BG8033187A BG49039A1 (en) 1986-07-07 1987-06-26 Method and device for protection of speak signals in successors for selective type of multifrequency code

Country Status (5)

Country Link
BG (1) BG49039A1 (de)
CS (1) CS471987A1 (de)
DD (1) DD259987A3 (de)
DE (1) DE3717937A1 (de)
HU (1) HU196541B (de)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2141502B1 (de) * 1971-06-01 1973-06-29 Ibm France
DE2517024C3 (de) * 1975-04-17 1978-03-02 Standard Elektrik Lorenz Ag, 7000 Stuttgart Schaltungsanordnung für einen Signalempfänger zum Sperren von Signalen, deren Pegel schwankt
DE2712847C3 (de) * 1977-03-23 1979-12-06 Siemens Ag, 1000 Berlin Und 8000 Muenchen Sprachgeschützter frequenzselektiver Zeichenempfänger
DE2712831B2 (de) * 1977-03-23 1980-01-24 Siemens Ag, 1000 Berlin Und 8000 Muenchen Sprachgeschützter frequenzselektiver Zeichenempfänger
NL7903346A (nl) * 1979-04-27 1980-10-29 Bell Telephone Mfg Digitaal signaleringsstelsel.

Also Published As

Publication number Publication date
CS471987A1 (en) 1989-09-12
HU196541B (en) 1988-11-28
DD259987A3 (de) 1988-09-14
DE3717937A1 (de) 1988-01-28
HUT44882A (en) 1988-04-28
DE3717937C2 (de) 1989-08-10

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