BE252855A - - Google Patents
Info
- Publication number
- BE252855A BE252855A BE252855DA BE252855A BE 252855 A BE252855 A BE 252855A BE 252855D A BE252855D A BE 252855DA BE 252855 A BE252855 A BE 252855A
- Authority
- BE
- Belgium
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M3/00—Automatic or semi-automatic exchanges
- H04M3/08—Indicating faults in circuits or apparatus
- H04M3/14—Signalling existence of persistent "off-hook" condition
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M3/00—Automatic or semi-automatic exchanges
- H04M3/08—Indicating faults in circuits or apparatus
- H04M3/12—Marking faulty circuits "busy"; Enabling equipment to disengage itself from faulty circuits ; Using redundant circuits; Response of a circuit, apparatus or system to an error
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Monitoring And Testing Of Exchanges (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEA0045063 | 1925-05-25 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE252855A true BE252855A (da) |
Family
ID=6934522
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE252855D BE252855A (da) | 1925-05-25 |
Country Status (3)
| Country | Link |
|---|---|
| BE (1) | BE252855A (da) |
| FR (1) | FR621406A (da) |
| GB (1) | GB252355A (da) |
-
0
- BE BE252855D patent/BE252855A/xx unknown
-
1926
- 1926-04-27 FR FR621406D patent/FR621406A/fr not_active Expired
- 1926-05-10 GB GB1209026A patent/GB252355A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| GB252355A (en) | 1927-08-10 |
| FR621406A (fr) | 1927-05-11 |