BE666127A - - Google Patents
Info
- Publication number
- BE666127A BE666127A BE666127DA BE666127A BE 666127 A BE666127 A BE 666127A BE 666127D A BE666127D A BE 666127DA BE 666127 A BE666127 A BE 666127A
- Authority
- BE
- Belgium
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q1/00—Details of selecting apparatus or arrangements
- H04Q1/18—Electrical details
- H04Q1/30—Signalling arrangements; Manipulation of signalling currents
- H04Q1/38—Signalling arrangements; Manipulation of signalling currents using combinations of direct currents of different amplitudes or polarities over line conductors or combination of line conductors
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Arrangements For Transmission Of Measured Signals (AREA)
- Measurement Of Unknown Time Intervals (AREA)
- Measurement Of Current Or Voltage (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEST22324A DE1221308B (de) | 1964-06-30 | 1964-06-30 | Verfahren und Schaltungsanordnung zur Abfrage codierter Gleichstromzeichen an Fernmeldeleitungen |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE666127A true BE666127A (xx) | 1965-12-30 |
Family
ID=7459319
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE666127D BE666127A (xx) | 1964-06-30 | 1965-06-30 |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US3441683A (xx) |
| BE (1) | BE666127A (xx) |
| CH (1) | CH427924A (xx) |
| DE (1) | DE1221308B (xx) |
| GB (1) | GB1061135A (xx) |
| NL (1) | NL6508361A (xx) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4178486A (en) * | 1978-09-13 | 1979-12-11 | Gte Automatic Electric Laboratories Incorporated | Ring sensing circuit for use with a service evaluation system |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL230902A (xx) * | 1957-08-28 |
-
1964
- 1964-06-30 DE DEST22324A patent/DE1221308B/de active Pending
-
1965
- 1965-06-22 US US465868A patent/US3441683A/en not_active Expired - Lifetime
- 1965-06-25 GB GB26998/65A patent/GB1061135A/en not_active Expired
- 1965-06-29 NL NL6508361A patent/NL6508361A/xx unknown
- 1965-06-29 CH CH905965A patent/CH427924A/de unknown
- 1965-06-30 BE BE666127D patent/BE666127A/xx unknown
Also Published As
| Publication number | Publication date |
|---|---|
| CH427924A (de) | 1967-01-15 |
| GB1061135A (en) | 1967-03-08 |
| DE1221308B (de) | 1966-07-21 |
| NL6508361A (xx) | 1965-12-31 |
| US3441683A (en) | 1969-04-29 |