BE559675A - - Google Patents
Info
- Publication number
- BE559675A BE559675A BE559675DA BE559675A BE 559675 A BE559675 A BE 559675A BE 559675D A BE559675D A BE 559675DA BE 559675 A BE559675 A BE 559675A
- Authority
- BE
- Belgium
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/40—Monitoring; Testing of relay systems
- H04B17/401—Monitoring; Testing of relay systems with selective localization
- H04B17/402—Monitoring; Testing of relay systems with selective localization using different frequencies
- H04B17/405—Monitoring; Testing of relay systems with selective localization using different frequencies generated by local multipliers, dividers, modulators
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Monitoring And Testing Of Transmission In General (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US606485A US2843668A (en) | 1956-08-27 | 1956-08-27 | Repeater testing system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE559675A true BE559675A (fr) | 1900-01-01 |
Family
ID=24428171
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE559675D BE559675A (fr) | 1956-08-27 |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US2843668A (fr) |
| BE (1) | BE559675A (fr) |
| DE (1) | DE1080620B (fr) |
| FR (1) | FR1183079A (fr) |
| GB (1) | GB824508A (fr) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3172965A (en) * | 1959-04-10 | 1965-03-09 | Communication transmission system em- ploying intermediate repeaters | |
| DE1131747B (de) * | 1959-05-15 | 1962-06-20 | Felten & Guilleaume Carlswerk | Verfahren und Anordnung zur UEberwachung von unbemannten Verstaerkeraemtern in Fernmeldeuebertragungs-systemen |
| US3600674A (en) * | 1969-04-02 | 1971-08-17 | Chevron Res | Method of determining leaks from buried pipelines using a time-sharing transmission line |
| FR2252794A5 (fr) * | 1973-11-28 | 1975-06-20 | Cit Alcatel | |
| US4025737A (en) * | 1976-03-24 | 1977-05-24 | Bell Telephone Laboratories, Incorporated | Repeater monitoring and fault location |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1611350A (en) * | 1923-07-25 | 1926-12-21 | Western Electric Co | Carrier-wave transmission |
| US2249323A (en) * | 1937-08-11 | 1941-07-15 | Bell Telephone Labor Inc | Testing apparatus |
| DE932135C (de) * | 1952-05-24 | 1955-08-25 | Felten & Guilleaume Carlswerk | Einrichtung zur UEberwachung, Fernsteuerung bzw. Fehlerortung von UEbertragungsanlagen |
-
0
- BE BE559675D patent/BE559675A/xx unknown
-
1956
- 1956-08-27 US US606485A patent/US2843668A/en not_active Expired - Lifetime
-
1957
- 1957-05-09 DE DEW21141A patent/DE1080620B/de active Pending
- 1957-08-09 GB GB25191/57A patent/GB824508A/en not_active Expired
- 1957-08-12 FR FR1183079D patent/FR1183079A/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| US2843668A (en) | 1958-07-15 |
| DE1080620B (de) | 1960-04-28 |
| GB824508A (en) | 1959-12-02 |
| FR1183079A (fr) | 1959-07-02 |