BE501787A - - Google Patents
Info
- Publication number
- BE501787A BE501787A BE501787DA BE501787A BE 501787 A BE501787 A BE 501787A BE 501787D A BE501787D A BE 501787DA BE 501787 A BE501787 A BE 501787A
- Authority
- BE
- Belgium
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/738—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
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M11/00—Telephonic communication systems specially adapted for combination with other electrical systems
- H04M11/04—Telephonic communication systems specially adapted for combination with other electrical systems with alarm systems, e.g. fire, police or burglar alarm systems
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Alarm Systems (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB594551A GB706198A (en) | 1951-03-12 | 1951-03-12 | Improvements in or relating to telephone systems |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE501787A true BE501787A (da) |
Family
ID=9805561
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE501787D BE501787A (da) | 1951-03-12 |
Country Status (2)
| Country | Link |
|---|---|
| BE (1) | BE501787A (da) |
| GB (1) | GB706198A (da) |
-
0
- BE BE501787D patent/BE501787A/xx unknown
-
1951
- 1951-03-12 GB GB594551A patent/GB706198A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| GB706198A (en) | 1954-03-24 |