BE663507A - - Google Patents
Info
- Publication number
- BE663507A BE663507A BE663507DA BE663507A BE 663507 A BE663507 A BE 663507A BE 663507D A BE663507D A BE 663507DA BE 663507 A BE663507 A BE 663507A
- Authority
- BE
- Belgium
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/26—Devices for calling a subscriber
- H04M1/515—Devices for calling a subscriber by generating or selecting signals other than trains of pulses of similar shape, or signals other than currents of one or more different frequencies, e.g. generation of dc signals of alternating polarity, coded pulses or impedance dialling
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q3/00—Selecting arrangements
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Sub-Exchange Stations And Push- Button Telephones (AREA)
- Push-Button Switches (AREA)
- Transmission And Conversion Of Sensor Element Output (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEST22140A DE1193109B (de) | 1964-05-20 | 1964-05-20 | Unsymmetrisches Gleichstrom-Signalverfahren ueber zweiadrige Fernmelde-, insbesondere Fernsprechleitungen und Anordnung zur Durchfuehrung des Verfahrens |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE663507A true BE663507A (xx) | 1965-11-08 |
Family
ID=7459245
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE663507D BE663507A (xx) | 1964-05-20 | 1965-05-06 |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US3454724A (xx) |
| BE (1) | BE663507A (xx) |
| DE (1) | DE1193109B (xx) |
| FR (1) | FR1434725A (xx) |
| GB (1) | GB1063404A (xx) |
| NL (1) | NL6506009A (xx) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3742141A (en) * | 1970-10-19 | 1973-06-26 | Terra Corp | Hotel/motel room status system |
| US4421951A (en) * | 1981-09-24 | 1983-12-20 | Bell Telephone Laboratories, Incorporated | Method and arrangement for signaling the transmission mode of a communication system |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1219588B (de) * | 1962-10-20 | 1966-06-23 | Standard Elektrik Lorenz Ag | Schutzrohrkontakt mit Kugelanker |
| DE1179608B (de) * | 1963-04-23 | 1964-10-15 | Siemens Ag | Schaltungsanordnung zur UEbertragung von Zeichen ueber mehradrige Fernmeldeleitungen, insbesondere fuer Fernsprechanlagen |
-
1964
- 1964-05-20 DE DEST22140A patent/DE1193109B/de active Pending
-
1965
- 1965-05-06 BE BE663507D patent/BE663507A/xx unknown
- 1965-05-11 US US454877A patent/US3454724A/en not_active Expired - Lifetime
- 1965-05-12 NL NL6506009A patent/NL6506009A/xx unknown
- 1965-05-14 GB GB20431/65A patent/GB1063404A/en not_active Expired
- 1965-05-20 FR FR17785A patent/FR1434725A/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| GB1063404A (en) | 1967-03-30 |
| NL6506009A (xx) | 1965-11-22 |
| FR1434725A (fr) | 1966-04-08 |
| DE1193109B (de) | 1965-05-20 |
| US3454724A (en) | 1969-07-08 |