BE719887A - - Google Patents
Info
- Publication number
- BE719887A BE719887A BE719887DA BE719887A BE 719887 A BE719887 A BE 719887A BE 719887D A BE719887D A BE 719887DA BE 719887 A BE719887 A BE 719887A
- 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
- H04M3/2272—Subscriber line supervision circuits, e.g. call detection circuits
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR163940 | 1968-08-23 | ||
| BE719887 | 1968-08-23 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE719887A true BE719887A (zh) | 1969-02-24 |
Family
ID=25656702
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE719887D BE719887A (zh) | 1968-08-23 | 1968-08-23 |
Country Status (2)
| Country | Link |
|---|---|
| BE (1) | BE719887A (zh) |
| FR (1) | FR1599738A (zh) |
-
1968
- 1968-08-23 FR FR163940A patent/FR1599738A/fr not_active Expired
- 1968-08-23 BE BE719887D patent/BE719887A/xx unknown
Also Published As
| Publication number | Publication date |
|---|---|
| FR1599738A (zh) | 1970-07-20 |