BE445816A - - Google Patents
Info
- Publication number
- BE445816A BE445816A BE445816DA BE445816A BE 445816 A BE445816 A BE 445816A BE 445816D A BE445816D A BE 445816DA BE 445816 A BE445816 A BE 445816A
- Authority
- BE
- Belgium
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/78—Circuit arrangements in which low-frequency speech signals proceed in one direction on the line, while speech signals proceeding in the other direction on the line are modulated on a high-frequency carrier signal
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/738—Interface circuits for coupling substations to external telephone lines
- H04M1/74—Interface circuits for coupling substations to external telephone lines with means for reducing interference; with means for reducing effects due to line faults
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Devices For Supply Of Signal Current (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE160641X | 1941-06-16 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE445816A true BE445816A (it) | 1942-08-31 |
Family
ID=5681342
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE445816D BE445816A (it) | 1941-06-16 |
Country Status (4)
| Country | Link |
|---|---|
| BE (1) | BE445816A (it) |
| CH (1) | CH226353A (it) |
| DE (1) | DE891858C (it) |
| FR (1) | FR882324A (it) |
-
0
- BE BE445816D patent/BE445816A/xx unknown
-
1941
- 1941-06-17 DE DEL4113D patent/DE891858C/de not_active Expired
-
1942
- 1942-04-20 CH CH226353D patent/CH226353A/de unknown
- 1942-05-26 FR FR882324D patent/FR882324A/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR882324A (fr) | 1943-05-31 |
| CH226353A (de) | 1943-03-31 |
| DE891858C (de) | 1953-10-01 |