NL299523A - - Google Patents
Info
- Publication number
- NL299523A NL299523A NL299523DA NL299523A NL 299523 A NL299523 A NL 299523A NL 299523D A NL299523D A NL 299523DA NL 299523 A NL299523 A NL 299523A
- Authority
- NL
- Netherlands
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
-
- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C19/00—Electric signal transmission systems
- G08C19/02—Electric signal transmission systems in which the signal transmitted is magnitude of current or voltage
- G08C19/025—Electric signal transmission systems in which the signal transmitted is magnitude of current or voltage using fixed values of magnitude of current or voltage
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Interface Circuits In Exchanges (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEST19873A DE1168505B (de) | 1962-10-20 | 1962-10-20 | Empfangseinrichtung fuer ein Gleichstrom-signalverfahren in Fernmelde-, insbesondere Fernsprechanlagen |
| FR950939A FR1372263A (fr) | 1963-10-17 | 1963-10-17 | Perfectionnements aux systèmes de transmission de signalisations |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL299523A true NL299523A (xx) |
Family
ID=25994130
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL299523D NL299523A (xx) | 1962-10-20 |
Country Status (2)
| Country | Link |
|---|---|
| DE (1) | DE1168505B (xx) |
| NL (1) | NL299523A (xx) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1287162B (de) * | 1964-08-17 | 1969-01-16 | Int Standard Electric Corp | Verfahren und Schaltungsanordnung zur Waehlziffernuebertragung ueber eine zwei Fernsprechzentralen verbindende zweiadrige Verbindungsleitung |
| NO133006C (xx) * | 1974-05-16 | 1976-02-18 | Manus Max |
-
0
- NL NL299523D patent/NL299523A/xx unknown
-
1962
- 1962-10-20 DE DEST19873A patent/DE1168505B/de active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| DE1168505B (de) | 1964-04-23 |