FR737027A - - Google Patents
Info
- Publication number
- FR737027A FR737027A FR737027DA FR737027A FR 737027 A FR737027 A FR 737027A FR 737027D A FR737027D A FR 737027DA FR 737027 A FR737027 A FR 737027A
- Authority
- FR
- France
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/20—Repeater circuits; Relay circuits
- H04L25/207—Repeater circuits; Relay circuits using electromagnetic switches
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M11/00—Telephonic communication systems specially adapted for combination with other electrical systems
- H04M11/06—Simultaneous speech and data transmission, e.g. telegraphic transmission over the same conductors
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Power Engineering (AREA)
- Interface Circuits In Exchanges (AREA)
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US413838A US2153574A (en) | 1929-12-13 | 1929-12-13 | Automatic switching system and apparatus |
| GB988832A GB399516A (en) | 1932-04-06 | 1932-04-06 | An improved communication system for alternative telephone and telegraph service |
| US208990A US2198344A (en) | 1929-12-13 | 1938-05-20 | Electrical signal repeating system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| FR737027A true FR737027A (ru) | 1932-12-05 |
Family
ID=32073900
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR737027D Expired FR737027A (ru) | 1929-12-13 |
Country Status (2)
| Country | Link |
|---|---|
| US (2) | US2153574A (ru) |
| FR (1) | FR737027A (ru) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2483449A (en) * | 1941-04-18 | 1949-10-04 | Western Union Telegraph Co | Facsimile transmission system |
| US2522462A (en) * | 1947-06-07 | 1950-09-12 | Teletype Corp | Combined telephone and telegraph system |
| US2483732A (en) * | 1947-12-18 | 1949-10-04 | Bell Telephone Labor Inc | Signaling circuit |
| US3071641A (en) * | 1959-12-03 | 1963-01-01 | Litton Systems Inc | Communication switching systems |
-
0
- FR FR737027D patent/FR737027A/fr not_active Expired
-
1929
- 1929-12-13 US US413838A patent/US2153574A/en not_active Expired - Lifetime
-
1938
- 1938-05-20 US US208990A patent/US2198344A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| US2198344A (en) | 1940-04-23 |
| US2153574A (en) | 1939-04-11 |