FR81431E - - Google Patents
Info
- Publication number
- FR81431E FR81431E FR891904A FR891904A FR81431E FR 81431 E FR81431 E FR 81431E FR 891904 A FR891904 A FR 891904A FR 891904 A FR891904 A FR 891904A FR 81431 E FR81431 E FR 81431E
- 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
- H04M9/00—Arrangements for interconnection not involving centralised switching
- H04M9/001—Two-way communication systems between a limited number of parties
-
- 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
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M9/00—Arrangements for interconnection not involving centralised switching
- H04M9/04—Arrangements for interconnection not involving centralised switching involving a separate line for each pair of parties
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT102860A AT233634B (de) | 1960-02-10 | 1960-02-10 | Schaltungsanordnung für eine Wechselsprechanlage |
| AT240561A AT227788B (de) | 1961-03-23 | 1961-03-23 | Schaltungsanordnung zur Nachrichtenübermittlung, insbesondere für Wechselsprechanlagen |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| FR81431E true FR81431E (pt) | 1963-08-12 |
Family
ID=25594636
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR891904A Expired FR81431E (pt) | 1960-02-10 | 1962-03-22 |
Country Status (1)
| Country | Link |
|---|---|
| FR (1) | FR81431E (pt) |
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1962
- 1962-03-22 FR FR891904A patent/FR81431E/fr not_active Expired