FR954791A - - Google Patents
Info
- Publication number
- FR954791A FR954791A FR954791DA FR954791A FR 954791 A FR954791 A FR 954791A FR 954791D A FR954791D A FR 954791DA FR 954791 A FR954791 A FR 954791A
- Authority
- FR
- France
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
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)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| FR954791A true FR954791A (pt) | 1950-01-05 |
Family
ID=1557629
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR954791D Expired FR954791A (pt) |
Country Status (1)
| Country | Link |
|---|---|
| FR (1) | FR954791A (pt) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0491473A2 (en) * | 1990-12-18 | 1992-06-24 | Sangara Industrial Co. Ltd. | Control circuit for an electrical telephone accessory |
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0
- FR FR954791D patent/FR954791A/fr not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0491473A2 (en) * | 1990-12-18 | 1992-06-24 | Sangara Industrial Co. Ltd. | Control circuit for an electrical telephone accessory |
| EP0491473A3 (en) * | 1990-12-18 | 1992-12-09 | Sangara Industrial Co. Ltd. | Control circuit for an electrical telephone accessory |