BE477040A - - Google Patents
Info
- Publication number
- BE477040A BE477040A BE477040DA BE477040A BE 477040 A BE477040 A BE 477040A BE 477040D A BE477040D A BE 477040DA BE 477040 A BE477040 A BE 477040A
- Authority
- BE
- Belgium
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q1/00—Details of selecting apparatus or arrangements
- H04Q1/18—Electrical details
- H04Q1/30—Signalling arrangements; Manipulation of signalling currents
- H04Q1/44—Signalling arrangements; Manipulation of signalling currents using alternate current
- H04Q1/442—Signalling arrangements; Manipulation of signalling currents using alternate current with out-of-voice band signalling frequencies
- H04Q1/4423—Signalling arrangements; Manipulation of signalling currents using alternate current with out-of-voice band signalling frequencies using one signalling frequency
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Devices For Supply Of Signal Current (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US707100A US2491263A (en) | 1946-11-01 | 1946-11-01 | Ringing system for voice current repeaters |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE477040A true BE477040A (fr) |
Family
ID=24840350
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE477040D BE477040A (fr) | 1946-11-01 |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US2491263A (fr) |
| BE (1) | BE477040A (fr) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2554828A (en) * | 1947-07-07 | 1951-05-29 | Bell Telephone Labor Inc | Testing repeaters in transmission systems by shunting out individual repeaters |
| US2644044A (en) * | 1949-05-28 | 1953-06-30 | Automatic Elect Lab | Voice current repeater |
| US2872518A (en) * | 1951-11-23 | 1959-02-03 | Gen Dynamics Corp | Party line telephone system |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1697933A (en) * | 1926-10-26 | 1929-01-08 | American Telephone & Telegraph | Signaling circuits for repeaters |
| US1829803A (en) * | 1930-08-04 | 1931-11-03 | Bell Telephone Labor Inc | Telephone system |
| BE465290A (fr) * | 1945-04-30 |
-
0
- BE BE477040D patent/BE477040A/xx unknown
-
1946
- 1946-11-01 US US707100A patent/US2491263A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| US2491263A (en) | 1949-12-13 |