ZA806589B - Installation for the transmission of control signals by means of a voice channel - Google Patents
Installation for the transmission of control signals by means of a voice channelInfo
- Publication number
- ZA806589B ZA806589B ZA00806589A ZA806589A ZA806589B ZA 806589 B ZA806589 B ZA 806589B ZA 00806589 A ZA00806589 A ZA 00806589A ZA 806589 A ZA806589 A ZA 806589A ZA 806589 B ZA806589 B ZA 806589B
- Authority
- ZA
- South Africa
- Prior art keywords
- installation
- transmission
- control signals
- voice channel
- voice
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04K—SECRET COMMUNICATION; JAMMING OF COMMUNICATION
- H04K1/00—Secret communication
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
- Selective Calling Equipment (AREA)
- Transmitters (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH997679 | 1979-11-07 |
Publications (1)
Publication Number | Publication Date |
---|---|
ZA806589B true ZA806589B (en) | 1981-10-28 |
Family
ID=4357749
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
ZA00806589A ZA806589B (en) | 1979-11-07 | 1980-10-27 | Installation for the transmission of control signals by means of a voice channel |
Country Status (7)
Country | Link |
---|---|
EP (1) | EP0028688A1 (xx) |
JP (1) | JPS5676646A (xx) |
AR (1) | AR224912A1 (xx) |
BR (1) | BR8007222A (xx) |
ES (1) | ES8200802A1 (xx) |
NO (1) | NO803344L (xx) |
ZA (1) | ZA806589B (xx) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58154961A (ja) * | 1982-03-10 | 1983-09-14 | Fujitsu Ltd | 秘匿通話方法 |
JPS5961242A (ja) * | 1982-09-30 | 1984-04-07 | Fujitsu Ltd | 秘匿通信システム |
US4815128A (en) * | 1986-07-03 | 1989-03-21 | Motorola, Inc. | Gateway system and method for interconnecting telephone calls with a digital voice protected radio network |
EP0313029A1 (de) * | 1987-10-21 | 1989-04-26 | Siemens Aktiengesellschaft Österreich | Vorrichtung zur verschleierten Übertragung analoger Signale |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2542183A (en) * | 1948-07-10 | 1951-02-20 | Bell Telephone Labor Inc | Transmission privacy synchronizing and equalizing system |
GB1051791A (xx) * | 1964-01-09 | 1900-01-01 |
-
1980
- 1980-09-12 EP EP80105445A patent/EP0028688A1/de not_active Withdrawn
- 1980-10-21 ES ES496115A patent/ES8200802A1/es not_active Expired
- 1980-10-27 ZA ZA00806589A patent/ZA806589B/xx unknown
- 1980-10-31 AR AR283088A patent/AR224912A1/es active
- 1980-11-04 JP JP15395180A patent/JPS5676646A/ja active Pending
- 1980-11-06 BR BR8007222A patent/BR8007222A/pt unknown
- 1980-11-06 NO NO803344A patent/NO803344L/no unknown
Also Published As
Publication number | Publication date |
---|---|
BR8007222A (pt) | 1981-05-19 |
ES496115A0 (es) | 1981-11-16 |
EP0028688A1 (de) | 1981-05-20 |
NO803344L (no) | 1981-05-08 |
AR224912A1 (es) | 1982-01-29 |
ES8200802A1 (es) | 1981-11-16 |
JPS5676646A (en) | 1981-06-24 |
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