DK52682A - PROCEDURES FOR REPLACING DELBAND - Google Patents
PROCEDURES FOR REPLACING DELBANDInfo
- Publication number
- DK52682A DK52682A DK52682A DK52682A DK52682A DK 52682 A DK52682 A DK 52682A DK 52682 A DK52682 A DK 52682A DK 52682 A DK52682 A DK 52682A DK 52682 A DK52682 A DK 52682A
- Authority
- DK
- Denmark
- Prior art keywords
- delband
- replacing
- procedures
- replacing delband
- Prior art date
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
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Compression, Expansion, Code Conversion, And Decoders (AREA)
- Transmission Systems Not Characterized By The Medium Used For Transmission (AREA)
- Synchronisation In Digital Transmission Systems (AREA)
- Position Fixing By Use Of Radio Waves (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19813105214 DE3105214A1 (en) | 1981-02-13 | 1981-02-13 | "SUB-TAPE EXCHANGE PROCEDURE" |
Publications (1)
Publication Number | Publication Date |
---|---|
DK52682A true DK52682A (en) | 1982-08-14 |
Family
ID=6124771
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DK52682A DK52682A (en) | 1981-02-13 | 1982-02-08 | PROCEDURES FOR REPLACING DELBAND |
Country Status (7)
Country | Link |
---|---|
EP (1) | EP0058318B1 (en) |
CA (1) | CA1186380A (en) |
DE (2) | DE3105214A1 (en) |
DK (1) | DK52682A (en) |
ES (1) | ES509565A0 (en) |
FI (1) | FI820393L (en) |
PT (1) | PT74410B (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6424648A (en) * | 1987-07-21 | 1989-01-26 | Fujitsu Ltd | Privacy call equipment |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2408692A (en) * | 1942-04-29 | 1946-10-01 | Rca Corp | Signaling system |
CH248975A (en) * | 1946-02-04 | 1947-05-31 | Patelhold Patentverwertung | Process and device for disguising the individual calls in a multi-channel system. |
DE1273002B (en) * | 1963-09-11 | 1968-07-18 | Siemens Ag | Device for the encrypted transmission of voice signals by interchanging subbands |
DE2652607A1 (en) * | 1976-11-19 | 1978-05-24 | Licentia Gmbh | Analogue information signal encoder - includes array of ring modulators and stores time and frequency multiplexed elements in digital form |
-
1981
- 1981-02-13 DE DE19813105214 patent/DE3105214A1/en not_active Withdrawn
-
1982
- 1982-01-29 DE DE8282100607T patent/DE3260506D1/en not_active Expired
- 1982-01-29 EP EP82100607A patent/EP0058318B1/en not_active Expired
- 1982-02-05 CA CA000395659A patent/CA1186380A/en not_active Expired
- 1982-02-08 DK DK52682A patent/DK52682A/en not_active Application Discontinuation
- 1982-02-08 FI FI820393A patent/FI820393L/en not_active Application Discontinuation
- 1982-02-10 PT PT74410A patent/PT74410B/en unknown
- 1982-02-12 ES ES509565A patent/ES509565A0/en active Granted
Also Published As
Publication number | Publication date |
---|---|
ES8302387A1 (en) | 1982-12-16 |
PT74410B (en) | 1983-10-28 |
FI820393L (en) | 1982-08-14 |
EP0058318A1 (en) | 1982-08-25 |
DE3105214A1 (en) | 1982-09-09 |
DE3260506D1 (en) | 1984-09-13 |
CA1186380A (en) | 1985-04-30 |
EP0058318B1 (en) | 1984-08-08 |
ES509565A0 (en) | 1982-12-16 |
PT74410A (en) | 1982-03-01 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
ATS | Application withdrawn |