BE862540A - RADIOTELEPHONY SYSTEM - Google Patents
RADIOTELEPHONY SYSTEMInfo
- Publication number
- BE862540A BE862540A BE184023A BE184023A BE862540A BE 862540 A BE862540 A BE 862540A BE 184023 A BE184023 A BE 184023A BE 184023 A BE184023 A BE 184023A BE 862540 A BE862540 A BE 862540A
- Authority
- BE
- Belgium
- Prior art keywords
- radiotelephony system
- radiotelephony
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04K—SECRET COMMUNICATION; JAMMING OF COMMUNICATION
- H04K1/00—Secret communication
- H04K1/02—Secret communication by adding a second signal to make the desired signal unintelligible
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2659622A DE2659622C2 (en) | 1976-12-30 | 1976-12-30 | Radiotelephony system |
Publications (1)
Publication Number | Publication Date |
---|---|
BE862540A true BE862540A (en) | 1978-04-14 |
Family
ID=5997076
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
BE184023A BE862540A (en) | 1976-12-30 | 1977-12-30 | RADIOTELEPHONY SYSTEM |
Country Status (10)
Country | Link |
---|---|
JP (1) | JPS5826864B2 (en) |
AT (1) | AT360593B (en) |
BE (1) | BE862540A (en) |
CH (1) | CH625650A5 (en) |
DE (1) | DE2659622C2 (en) |
DK (1) | DK148049B (en) |
FR (1) | FR2376574A1 (en) |
GB (1) | GB1584579A (en) |
IT (1) | IT1089194B (en) |
NL (1) | NL176823C (en) |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2927885A1 (en) * | 1979-07-11 | 1981-01-29 | Bosch Gmbh Robert | Radio communication security system - has mobile transceivers, each using dedicated code which is decoded at main station from call number |
DE3150254A1 (en) * | 1981-04-13 | 1983-07-14 | Siemens AG, 1000 Berlin und 8000 München | DEVICE FOR ENCRYPTED DIGITAL INFORMATION TRANSFER |
US4549308A (en) * | 1982-07-12 | 1985-10-22 | At&T Bell Laboratories | Secure mobile radio telephony |
DE3335672A1 (en) * | 1983-09-30 | 1985-04-04 | Siemens AG, 1000 Berlin und 8000 München | ENCRYPTED MESSAGE TRANSMISSION METHOD |
DE3402467A1 (en) * | 1984-01-25 | 1985-08-01 | Philips Kommunikations Industrie AG, 8500 Nürnberg | Dialling method protected against fraudulent use, for the subscribers of a radio network, in particular a mobile radio network |
DE3439159A1 (en) * | 1984-01-25 | 1986-04-30 | Philips Kommunikations Industrie AG, 8500 Nürnberg | Dialling method secured against fraudulent use |
DE3410936C2 (en) * | 1984-03-24 | 1997-09-18 | Philips Patentverwaltung | Method for recognizing the unauthorized use of an identification assigned to a mobile radio station in a radio transmission system |
DE3420874A1 (en) * | 1984-06-05 | 1985-12-05 | Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt | Method and arrangement for monitoring network access in telecommunications networks |
DE3439120A1 (en) * | 1984-10-25 | 1986-05-07 | Philips Kommunikations Industrie AG, 8500 Nürnberg | Method for identifying a subscriber station of a telecommunications network |
JPS61199342A (en) * | 1985-02-28 | 1986-09-03 | Tamura Electric Works Ltd | Cordless telephone set |
DE4242151C1 (en) * | 1992-12-14 | 1994-03-24 | Detecon Gmbh | Protecting mobile radio, e.g. telephone, against unauthorised use - comparing authentication parameter from input code to stored parameter, only allowing use if they match. |
DE4336995A1 (en) * | 1993-10-29 | 1995-05-04 | Sel Alcatel Ag | Method and device for determining the assignment of a mobile radio device to device lists |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SE371064B (en) * | 1973-03-09 | 1974-11-04 | Philips Svenska Ab |
-
1976
- 1976-12-30 DE DE2659622A patent/DE2659622C2/en not_active Expired
-
1977
- 1977-12-05 CH CH1481177A patent/CH625650A5/en not_active IP Right Cessation
- 1977-12-19 FR FR7738247A patent/FR2376574A1/en active Granted
- 1977-12-22 IT IT31081/77A patent/IT1089194B/en active
- 1977-12-26 JP JP52157173A patent/JPS5826864B2/en not_active Expired
- 1977-12-29 DK DK585277AA patent/DK148049B/en not_active Application Discontinuation
- 1977-12-29 AT AT938977A patent/AT360593B/en not_active IP Right Cessation
- 1977-12-29 GB GB54071/77A patent/GB1584579A/en not_active Expired
- 1977-12-29 NL NLAANVRAGE7714545,A patent/NL176823C/en not_active IP Right Cessation
- 1977-12-30 BE BE184023A patent/BE862540A/en not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
JPS5384602A (en) | 1978-07-26 |
GB1584579A (en) | 1981-02-11 |
NL7714545A (en) | 1978-07-04 |
IT1089194B (en) | 1985-06-18 |
DK585277A (en) | 1978-07-01 |
CH625650A5 (en) | 1981-09-30 |
ATA938977A (en) | 1980-06-15 |
NL176823C (en) | 1985-06-03 |
DE2659622B1 (en) | 1978-05-11 |
AT360593B (en) | 1981-01-26 |
FR2376574A1 (en) | 1978-07-28 |
DE2659622C2 (en) | 1979-01-04 |
NL176823B (en) | 1985-01-02 |
JPS5826864B2 (en) | 1983-06-06 |
FR2376574B1 (en) | 1980-08-22 |
DK148049B (en) | 1985-02-11 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
BE859268A (en) | RADIOCOMMUNICATIONS SYSTEM | |
FR2392712B1 (en) | EXTRACTOR-MIXER SYSTEM | |
SE428583B (en) | DUAL SYSTEM | |
FR2346025A1 (en) | RESPIRATORY SYSTEM | |
FR2274177A1 (en) | RADIOTELEPHONY SYSTEM | |
BE863067A (en) | BYPASS - FLUSHING SYSTEM | |
DK97477A (en) | RADAR RECEIVER | |
DK360877A (en) | INTERFERENCE-REFUSING RADAR SYSTEM | |
FR2299773A1 (en) | SYSTEM | |
FR2344849A1 (en) | RADIO-INTERFEROMETRY SYSTEM | |
DK310277A (en) | STROMMALES SYSTEM | |
FR2352452A1 (en) | UNILATERAL TRANSMISSION SYSTEM | |
SE7803498L (en) | ANTENNA SYSTEM | |
BE861695A (en) | CALCULATOR SYSTEM | |
FR2347550A1 (en) | PUMPING SYSTEM | |
DK431377A (en) | MOBILE COOLING SYSTEM | |
BE862540A (en) | RADIOTELEPHONY SYSTEM | |
FR2300363A1 (en) | AUTO-ADAP ADJUSTMENT SYSTEM | |
NO772757L (en) | MARINT RADAR SYSTEM. | |
BE856800A (en) | CHIMIOLUMINESCENT AQUEOUS SYSTEM | |
NL7700032A (en) | RADAR SYSTEM. | |
BE851924A (en) | LOUDSPEAKER SYSTEM | |
BE852845A (en) | RADIOTELEPHONY SYSTEM | |
BE853207A (en) | RADIOTELEPHONY SYSTEM | |
NL7802584A (en) | ANTENNA SYSTEM. |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
RE | Patent lapsed |
Owner name: SIEMENS A.G. Effective date: 19841230 |