BE454825A - - Google Patents
Info
- Publication number
- BE454825A BE454825A BE454825DA BE454825A BE 454825 A BE454825 A BE 454825A BE 454825D A BE454825D A BE 454825DA BE 454825 A BE454825 A BE 454825A
- Authority
- BE
- Belgium
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
- H04B3/02—Details
- H04B3/20—Reducing echo effects or singing; Opening or closing transmitting path; Conditioning for transmission in one direction or the other
-
- 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
-
- 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
- H04B1/54—Circuits using the same frequency for two directions of communication
- H04B1/58—Hybrid arrangements, i.e. arrangements for transition from single-path two-direction transmission to single-direction transmission on each of two paths or vice versa
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
- Mobile Radio Communication Systems (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL242259X | 1943-03-15 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE454825A true BE454825A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) |
Family
ID=19780631
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE454825D BE454825A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) | 1943-03-15 |
Country Status (5)
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2766324A (en) * | 1951-12-18 | 1956-10-09 | Motorola Inc | Switching system |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1639773A (en) * | 1927-08-23 | Two-way telephone transmission | ||
| US1706472A (en) * | 1926-04-23 | 1929-03-26 | American Telephone & Telegraph | Echo suppressor |
| US2258966A (en) * | 1940-10-12 | 1941-10-14 | Bell Telephone Labor Inc | Control of transmission in two-way signaling systems |
-
0
- BE BE454825D patent/BE454825A/xx unknown
-
1944
- 1944-03-13 FR FR902674D patent/FR902674A/fr not_active Expired
- 1944-05-23 CH CH242259D patent/CH242259A/de unknown
-
1946
- 1946-07-15 US US683707A patent/US2504008A/en not_active Expired - Lifetime
- 1946-07-23 GB GB21886/46A patent/GB614729A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR902674A (fr) | 1945-09-10 |
| US2504008A (en) | 1950-04-11 |
| GB614729A (en) | 1948-12-22 |
| CH242259A (de) | 1946-04-30 |