GB2137055B - Voice communication system - Google Patents
Voice communication systemInfo
- Publication number
- GB2137055B GB2137055B GB08306855A GB8306855A GB2137055B GB 2137055 B GB2137055 B GB 2137055B GB 08306855 A GB08306855 A GB 08306855A GB 8306855 A GB8306855 A GB 8306855A GB 2137055 B GB2137055 B GB 2137055B
- Authority
- GB
- United Kingdom
- Prior art keywords
- communication system
- voice communication
- voice
- communication
- 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.)
- Expired
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/40—Circuits
- H04B1/44—Transmit/receive switching
- H04B1/46—Transmit/receive switching by voice-frequency signals; by pilot signals
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Circuit For Audible Band Transducer (AREA)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB08306855A GB2137055B (en) | 1983-03-12 | 1983-03-12 | Voice communication system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB08306855A GB2137055B (en) | 1983-03-12 | 1983-03-12 | Voice communication system |
Publications (3)
Publication Number | Publication Date |
---|---|
GB8306855D0 GB8306855D0 (en) | 1983-04-20 |
GB2137055A GB2137055A (en) | 1984-09-26 |
GB2137055B true GB2137055B (en) | 1986-11-12 |
Family
ID=10539453
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB08306855A Expired GB2137055B (en) | 1983-03-12 | 1983-03-12 | Voice communication system |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB2137055B (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0395771A1 (en) * | 1989-04-22 | 1990-11-07 | tetronik Kommunikationstechnik GmbH | Distress calling device |
US5881156A (en) * | 1995-06-19 | 1999-03-09 | Treni; Michael | Portable, multi-functional, multi-channel wireless conference microphone |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB369636A (en) * | 1929-06-11 | 1932-03-23 | Electrical Res Prod Inc | Improvements in or relating to telephonic and like signalling transmission systems |
US1837316A (en) * | 1929-09-10 | 1931-12-22 | American Telephone & Telegraph | Voice operated control arrangement for telephone cable systems |
US1830220A (en) * | 1930-07-09 | 1931-11-03 | Bell Telephone Labor Inc | Transmission control |
JPS535008B2 (en) * | 1972-05-15 | 1978-02-23 | ||
IT1030881B (en) * | 1973-12-10 | 1979-04-10 | Cit Alcatel | SEMI SUPPRESSOR OF ECO FOR A TERMINAL OF A FOUR WIRE POWER LINE |
US3942116A (en) * | 1975-03-13 | 1976-03-02 | California Microwave, Inc. | Transceiver having improved voice actuated carrier and echo suppression circuit |
-
1983
- 1983-03-12 GB GB08306855A patent/GB2137055B/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
GB8306855D0 (en) | 1983-04-20 |
GB2137055A (en) | 1984-09-26 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
732E | Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977) | ||
PE20 | Patent expired after termination of 20 years |
Effective date: 20030311 |