FR1288163A - - Google Patents
Info
- Publication number
- FR1288163A FR1288163A FR852051A FR852051A FR1288163A FR 1288163 A FR1288163 A FR 1288163A FR 852051 A FR852051 A FR 852051A FR 852051 A FR852051 A FR 852051A FR 1288163 A FR1288163 A FR 1288163A
- 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
-
- 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
- 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)
- Interconnected Communication Systems, Intercoms, And Interphones (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT102860A AT233634B (en) | 1960-02-10 | 1960-02-10 | Circuit arrangement for an intercom |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| FR1288163A true FR1288163A (en) | 1962-02-12 |
Family
ID=3505113
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR852051A Expired FR1288163A (en) | 1960-02-10 | 1961-02-08 |
Country Status (5)
| Country | Link |
|---|---|
| AT (1) | AT233634B (en) |
| BE (1) | BE600001A (en) |
| CH (1) | CH388390A (en) |
| DE (1) | DE1164503B (en) |
| FR (1) | FR1288163A (en) |
-
1960
- 1960-02-10 AT AT102860A patent/AT233634B/en active
-
1961
- 1961-02-06 CH CH134561A patent/CH388390A/en unknown
- 1961-02-07 DE DE1961J0019384 patent/DE1164503B/en active Pending
- 1961-02-08 FR FR852051A patent/FR1288163A/fr not_active Expired
- 1961-02-09 BE BE600001A patent/BE600001A/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| DE1164503B (en) | 1964-03-05 |
| CH388390A (en) | 1965-02-28 |
| AT233634B (en) | 1964-05-25 |
| BE600001A (en) | 1961-05-29 |