BE519694A - - Google Patents
Info
- Publication number
- BE519694A BE519694A BE519694DA BE519694A BE 519694 A BE519694 A BE 519694A BE 519694D A BE519694D A BE 519694DA BE 519694 A BE519694 A BE 519694A
- Authority
- BE
- Belgium
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M3/00—Automatic or semi-automatic exchanges
- H04M3/22—Arrangements for supervision, monitoring or testing
- H04M3/26—Arrangements for supervision, monitoring or testing with means for applying test signals or for measuring
- H04M3/28—Automatic routine testing ; Fault testing; Installation testing; Test methods, test equipment or test arrangements therefor
- H04M3/30—Automatic routine testing ; Fault testing; Installation testing; Test methods, test equipment or test arrangements therefor for subscriber's lines, for the local loop
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Monitoring And Testing Of Exchanges (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
- Insulating Bodies (AREA)
- Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)
- Inspection Of Paper Currency And Valuable Securities (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US286265A US2721903A (en) | 1952-05-06 | 1952-05-06 | Line selection system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE519694A true BE519694A (zh) |
Family
ID=74129892
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE519694D BE519694A (zh) | 1952-05-06 |
Country Status (6)
| Country | Link |
|---|---|
| US (2) | US2721903A (zh) |
| JP (1) | JPS326403B1 (zh) |
| BE (1) | BE519694A (zh) |
| CA (2) | CA530352A (zh) |
| FR (1) | FR1079234A (zh) |
| GB (1) | GB740389A (zh) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2835751A (en) * | 1955-01-26 | 1958-05-20 | Itt | Automatic routine test apparatus |
| US2914624A (en) * | 1957-07-09 | 1959-11-24 | Gen Telephone Lab Inc | Automatic routiner for selector and connector switches |
| US3047680A (en) * | 1958-06-23 | 1962-07-31 | Gen Dynamics Corp | Pre-test test circuit for a line routiner |
| US3082299A (en) * | 1960-08-18 | 1963-03-19 | American Telephone & Telegraph | Alarm testing device |
| BE759380A (fr) * | 1969-11-26 | 1971-05-25 | Int Standard Electric Corp | Simulateur d'appels telephoniques |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1881544A (en) * | 1930-10-23 | 1932-10-11 | Western Electric Co | Testing device for telephone exchange systems |
| US2337411A (en) * | 1941-03-24 | 1943-12-21 | Automatic Elect Lab | Telephone system |
| US2375413A (en) * | 1943-02-17 | 1945-05-08 | John R Guenther | Counter |
| US2393236A (en) * | 1944-09-15 | 1946-01-22 | American Telephone & Telegraph | Subscribers' line testing system |
| US2535513A (en) * | 1946-02-23 | 1950-12-26 | Automatic Elect Lab | Testing device for line identifying equipment |
| US2617896A (en) * | 1947-09-17 | 1952-11-11 | Automatic Elect Lab | Test board for telephone systems |
| US2632817A (en) * | 1951-02-08 | 1953-03-24 | Automatic Elect Lab | Testing apparatus for telephone systems |
-
0
- BE BE519694D patent/BE519694A/xx unknown
- CA CA537334A patent/CA537334A/en not_active Expired
- CA CA530352A patent/CA530352A/en not_active Expired
-
1952
- 1952-05-06 US US286265A patent/US2721903A/en not_active Expired - Lifetime
- 1952-05-06 US US286266A patent/US2721910A/en not_active Expired - Lifetime
-
1953
- 1953-04-14 JP JP664053A patent/JPS326403B1/ja active Pending
- 1953-04-28 FR FR1079234D patent/FR1079234A/fr not_active Expired
- 1953-05-01 GB GB12118/53A patent/GB740389A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| CA537334A (en) | 1957-02-19 |
| FR1079234A (fr) | 1954-11-26 |
| JPS326403B1 (zh) | 1957-08-19 |
| US2721903A (en) | 1955-10-25 |
| GB740389A (en) | 1955-11-09 |
| CA530352A (en) | 1956-09-11 |
| US2721910A (en) | 1955-10-25 |