BE624321A - - Google Patents
Info
- Publication number
- BE624321A BE624321A BE624321DA BE624321A BE 624321 A BE624321 A BE 624321A BE 624321D A BE624321D A BE 624321DA BE 624321 A BE624321 A BE 624321A
- Authority
- BE
- Belgium
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q11/00—Selecting arrangements for multiplex systems
- H04Q11/04—Selecting arrangements for multiplex systems for time-division multiplexing
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/30—Systems using multi-frequency codes wherein each code element is represented by a combination of frequencies
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Exchange Systems With Centralized Control (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE1087061 | 1961-11-01 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE624321A true BE624321A (en:Method) |
Family
ID=20292964
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE624321D BE624321A (en:Method) | 1961-11-01 |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US3231677A (en:Method) |
| BE (1) | BE624321A (en:Method) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1211286B (de) * | 1964-03-06 | 1966-02-24 | Standard Elektrik Lorenz Ag | Mehrfrequenz-Code-Zwangslaufsignalverfahren mit Durchsignalisierung fuer Fernmelde-, insbesondere Fernsprechanlagen |
| US3436486A (en) * | 1965-12-21 | 1969-04-01 | Bell Telephone Labor Inc | Error detection system |
| US3557316A (en) * | 1967-06-02 | 1971-01-19 | Hitachi Ltd | System for providing alternative connective paths in a common control switching apparatus |
| US4922515A (en) * | 1989-07-25 | 1990-05-01 | American Telephone And Telegraph Company | Communication network cut-off detection arrangement |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2056265A (en) * | 1935-08-13 | 1936-10-06 | Beli Telephone Lab Inc | Telephone system |
| US2807671A (en) * | 1952-12-29 | 1957-09-24 | Siemens Brothers & Co Ltd | Automatic telephone systems |
| US2904636A (en) * | 1955-12-22 | 1959-09-15 | Bell Telephone Labor Inc | Telephone circuit using magnetic cores |
-
0
- BE BE624321D patent/BE624321A/xx unknown
-
1962
- 1962-04-13 US US187391A patent/US3231677A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| US3231677A (en) | 1966-01-25 |