FI68174A - - Google Patents
Info
- Publication number
- FI68174A FI68174A FI681/74A FI68174A FI68174A FI 68174 A FI68174 A FI 68174A FI 681/74 A FI681/74 A FI 681/74A FI 68174 A FI68174 A FI 68174A FI 68174 A FI68174 A FI 68174A
- Authority
- FI
- Finland
Links
Classifications
-
- 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
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M19/00—Current supply arrangements for telephone systems
- H04M19/08—Current supply arrangements for telephone systems with current supply sources at the substations
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Alarm Systems (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE2359669A DE2359669A1 (de) | 1973-11-30 | 1973-11-30 | Verfahren zum betrieb einer notrufsaeule, insbesondere an landstrassen, sowie einrichtung zur durchfuehrung des verfahrens |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| FI68174A true FI68174A ( ) | 1975-05-31 |
Family
ID=5899497
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FI681/74A FI68174A ( ) | 1973-11-30 | 1974-03-07 |
Country Status (4)
| Country | Link |
|---|---|
| DE (1) | DE2359669A1 ( ) |
| FI (1) | FI68174A ( ) |
| NO (1) | NO743914L ( ) |
| SE (1) | SE7414903L ( ) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2440129A1 (fr) * | 1978-10-26 | 1980-05-23 | Clavel Roger | Perfectionnements aux postes telephoniques d'appel d'urgence |
| FR2468260B1 (fr) * | 1979-10-25 | 1987-11-27 | Seriee | Installation et procede de controle automatique de l'etat d'une ligne telephonique |
| DE19541400C1 (de) * | 1995-11-07 | 1997-02-13 | Neumann Elektronik Gmbh | Informations-Notrufanlage |
-
1973
- 1973-11-30 DE DE2359669A patent/DE2359669A1/de active Pending
-
1974
- 1974-03-07 FI FI681/74A patent/FI68174A/fi unknown
- 1974-10-30 NO NO743914A patent/NO743914L/no unknown
- 1974-11-27 SE SE7414903A patent/SE7414903L/ not_active Application Discontinuation
Also Published As
| Publication number | Publication date |
|---|---|
| NO743914L ( ) | 1975-06-23 |
| SE7414903L ( ) | 1975-06-02 |
| DE2359669A1 (de) | 1975-06-05 |