BE478498A - - Google Patents
Info
- Publication number
- BE478498A BE478498A BE478498DA BE478498A BE 478498 A BE478498 A BE 478498A BE 478498D A BE478498D A BE 478498DA BE 478498 A BE478498 A BE 478498A
- Authority
- BE
- Belgium
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
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M3/00—Automatic or semi-automatic exchanges
- H04M3/42—Systems providing special services or facilities to subscribers
- H04M3/56—Arrangements for connecting several subscribers to a common circuit, i.e. affording conference facilities
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q3/00—Selecting arrangements
- H04Q3/0008—Selecting arrangements using relay selectors in the switching stages
- H04Q3/0012—Selecting arrangements using relay selectors in the switching stages in which the relays are arranged in a matrix configuration
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Multimedia (AREA)
- Computer Networks & Wireless Communication (AREA)
- Telephone Set Structure (AREA)
- Push-Button Switches (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE283934X | 1945-02-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE478498A true BE478498A (da) |
Family
ID=20307080
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE478498D BE478498A (da) | 1945-02-20 |
Country Status (3)
| Country | Link |
|---|---|
| BE (1) | BE478498A (da) |
| CH (1) | CH283934A (da) |
| GB (1) | GB643973A (da) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE937651C (de) * | 1952-08-31 | 1956-01-12 | Siemens Ag | Fernmelde-, insbesondere Fernsprechanlage mit Waehlerbetrieb |
| DE972172C (de) * | 1953-05-16 | 1959-06-04 | Normalzeit G M B H | Schaltungsanordnung fuer Fernsprechanlagen mit einer Stromstosssendevorrichtung |
-
0
- BE BE478498D patent/BE478498A/xx unknown
-
1946
- 1946-02-20 CH CH283934D patent/CH283934A/fr unknown
- 1946-02-20 GB GB5271/46A patent/GB643973A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| CH283934A (fr) | 1952-06-30 |
| GB643973A (en) | 1950-10-04 |