FR965560A - - Google Patents
Info
- Publication number
- FR965560A FR965560A FR965560DA FR965560A FR 965560 A FR965560 A FR 965560A FR 965560D A FR965560D A FR 965560DA FR 965560 A FR965560 A FR 965560A
- 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
- H04Q—SELECTING
- H04Q1/00—Details of selecting apparatus or arrangements
- H04Q1/18—Electrical details
- H04Q1/30—Signalling arrangements; Manipulation of signalling currents
- H04Q1/44—Signalling arrangements; Manipulation of signalling currents using alternate current
- H04Q1/444—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies
- H04Q1/446—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using one signalling frequency
- H04Q1/4465—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using one signalling frequency the same frequency being used for all signalling information, e.g. A.C. nr.9 system
-
- 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)
- Selective Calling Equipment (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2581462X | 1947-04-29 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| FR965560A true FR965560A (fr) | 1950-09-15 |
Family
ID=10910690
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR965560D Expired FR965560A (fr) | 1947-04-29 |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US2581462A (fr) |
| BE (1) | BE482466A (fr) |
| FR (1) | FR965560A (fr) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2805278A (en) * | 1951-09-04 | 1957-09-03 | Nederlanden Staat | Telegraph system |
| DE1211286B (de) * | 1964-03-06 | 1966-02-24 | Standard Elektrik Lorenz Ag | Mehrfrequenz-Code-Zwangslaufsignalverfahren mit Durchsignalisierung fuer Fernmelde-, insbesondere Fernsprechanlagen |
| WO1990013966A1 (fr) * | 1989-05-05 | 1990-11-15 | Motorola, Inc. | Transmission partielle d'informations destinee a l'interrogation de bases de donnees |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB485635A (en) * | 1936-11-20 | 1938-05-20 | Standard Telephones Cables Ltd | Improvements in or relating to telephone or like systems |
| US2424577A (en) * | 1941-05-28 | 1947-07-29 | Int Standard Electric Corp | Long distance telephone signaling system |
| GB560807A (en) * | 1942-10-15 | 1944-04-20 | Automatic Telephone & Elect | Improvements in telephone or like systems |
| BE467392A (fr) * | 1944-05-05 |
-
0
- BE BE482466D patent/BE482466A/xx unknown
- FR FR965560D patent/FR965560A/fr not_active Expired
-
1948
- 1948-04-28 US US23843A patent/US2581462A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| BE482466A (fr) | |
| US2581462A (en) | 1952-01-08 |