FR2285029A1 - DEVICE FOR THE MASKED TRANSMISSION OF CONVERSATION SIGNALS - Google Patents

DEVICE FOR THE MASKED TRANSMISSION OF CONVERSATION SIGNALS

Info

Publication number
FR2285029A1
FR2285029A1 FR7522195A FR7522195A FR2285029A1 FR 2285029 A1 FR2285029 A1 FR 2285029A1 FR 7522195 A FR7522195 A FR 7522195A FR 7522195 A FR7522195 A FR 7522195A FR 2285029 A1 FR2285029 A1 FR 2285029A1
Authority
FR
France
Prior art keywords
conversation signals
masked
transmission
masked transmission
conversation
Prior art date
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.)
Granted
Application number
FR7522195A
Other languages
French (fr)
Other versions
FR2285029B1 (en
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens AG
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
Priority claimed from DE19742434877 external-priority patent/DE2434877C3/en
Application filed by Siemens AG filed Critical Siemens AG
Publication of FR2285029A1 publication Critical patent/FR2285029A1/en
Application granted granted Critical
Publication of FR2285029B1 publication Critical patent/FR2285029B1/fr
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04K—SECRET COMMUNICATION; JAMMING OF COMMUNICATION
    • H04K1/00—Secret communication
    • H04K1/04—Secret communication by frequency scrambling, i.e. by transposing or inverting parts of the frequency band or by inverting the whole band
FR7522195A 1974-07-19 1975-07-16 DEVICE FOR THE MASKED TRANSMISSION OF CONVERSATION SIGNALS Granted FR2285029A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19742434877 DE2434877C3 (en) 1974-07-19 Device for the disguised transmission of speech signals

Publications (2)

Publication Number Publication Date
FR2285029A1 true FR2285029A1 (en) 1976-04-09
FR2285029B1 FR2285029B1 (en) 1977-12-16

Family

ID=5921046

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7522195A Granted FR2285029A1 (en) 1974-07-19 1975-07-16 DEVICE FOR THE MASKED TRANSMISSION OF CONVERSATION SIGNALS

Country Status (16)

Country Link
JP (1) JPS5826706B2 (en)
AT (1) AT341003B (en)
AU (1) AU501260B2 (en)
BE (1) BE831528A (en)
CH (1) CH596716A5 (en)
DK (1) DK140914C (en)
FR (1) FR2285029A1 (en)
GB (1) GB1512696A (en)
IE (1) IE41265B1 (en)
IL (1) IL47692A (en)
IN (1) IN147050B (en)
IT (1) IT1039917B (en)
LU (1) LU73007A1 (en)
NL (1) NL169664C (en)
SE (1) SE410259B (en)
ZA (1) ZA754406B (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2151886A (en) * 1983-12-21 1985-07-24 British Broadcasting Corp Conditional-access broadcast transmission
CA1226914A (en) * 1984-01-26 1987-09-15 The University Of British Columbia Modem for pseudo noise communication on a.c. lines
JP2761281B2 (en) * 1990-05-17 1998-06-04 富士通株式会社 Encrypted communication method for multi-carrier communication system

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB934013A (en) * 1960-10-28 1963-08-14 Cie Industielle Des Telephones Electronic coding device for radio or telephone links
FR2129013A5 (en) * 1971-03-11 1972-10-27 Snecma
FR2224946A1 (en) * 1973-04-03 1974-10-31 Siemens Ag

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB934013A (en) * 1960-10-28 1963-08-14 Cie Industielle Des Telephones Electronic coding device for radio or telephone links
FR2129013A5 (en) * 1971-03-11 1972-10-27 Snecma
FR2224946A1 (en) * 1973-04-03 1974-10-31 Siemens Ag

Also Published As

Publication number Publication date
JPS5826706B2 (en) 1983-06-04
NL169664B (en) 1982-03-01
DK328275A (en) 1976-01-20
AU8290875A (en) 1977-01-13
FR2285029B1 (en) 1977-12-16
GB1512696A (en) 1978-06-01
SE7508246L (en) 1976-01-20
DE2434877B2 (en) 1976-05-13
IE41265B1 (en) 1979-11-21
DK140914C (en) 1980-05-12
CH596716A5 (en) 1978-03-15
ATA526575A (en) 1977-05-15
IN147050B (en) 1979-10-27
AU501260B2 (en) 1979-06-14
LU73007A1 (en) 1976-07-01
DK140914B (en) 1979-12-03
NL169664C (en) 1982-08-02
JPS5134603A (en) 1976-03-24
NL7508643A (en) 1976-01-21
AT341003B (en) 1978-01-10
IT1039917B (en) 1979-12-10
DE2434877A1 (en) 1976-01-29
IL47692A0 (en) 1975-12-31
ZA754406B (en) 1976-06-30
SE410259B (en) 1979-10-01
IL47692A (en) 1977-11-30
IE41265L (en) 1976-01-19
BE831528A (en) 1976-01-19

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Legal Events

Date Code Title Description
ST Notification of lapse