SE7200070L - - Google Patents
Info
- Publication number
- SE7200070L SE7200070L SE7200070A SE7200070A SE7200070L SE 7200070 L SE7200070 L SE 7200070L SE 7200070 A SE7200070 A SE 7200070A SE 7200070 A SE7200070 A SE 7200070A SE 7200070 L SE7200070 L SE 7200070L
- Authority
- SE
- Sweden
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M19/00—Current supply arrangements for telephone systems
- H04M19/02—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone
- H04M19/04—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone the ringing-current being generated at the substations
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE7200070T |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SE7200070L true SE7200070L (h) | 1972-07-19 |
Family
ID=44679691
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SE7200070A SE7200070L (h) |
Country Status (1)
| Country | Link |
|---|---|
| SE (1) | SE7200070L (h) |
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0
- SE SE7200070A patent/SE7200070L/xx unknown