LU74588A1 - - Google Patents
Info
- Publication number
- LU74588A1 LU74588A1 LU74588A LU74588A LU74588A1 LU 74588 A1 LU74588 A1 LU 74588A1 LU 74588 A LU74588 A LU 74588A LU 74588 A LU74588 A LU 74588A LU 74588 A1 LU74588 A1 LU 74588A1
- Authority
- LU
- Luxembourg
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M19/00—Current supply arrangements for telephone systems
- H04M19/001—Current supply source at the exchanger providing current to substations
- H04M19/005—Feeding arrangements without the use of line transformers
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/40—Circuits
- H04B1/54—Circuits using the same frequency for two directions of communication
- H04B1/58—Hybrid arrangements, i.e. arrangements for transition from single-path two-direction transmission to single-direction transmission on each of two paths or vice versa
- H04B1/587—Hybrid arrangements, i.e. arrangements for transition from single-path two-direction transmission to single-direction transmission on each of two paths or vice versa using opto-couplers
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Power Engineering (AREA)
- Computer Networks & Wireless Communication (AREA)
- Interface Circuits In Exchanges (AREA)
- Amplifiers (AREA)
- Devices For Supply Of Signal Current (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR7508696A FR2305080A1 (fr) | 1975-03-20 | 1975-03-20 | Termineur electronique |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| LU74588A1 true LU74588A1 (cg-RX-API-DMAC10.html) | 1976-09-01 |
Family
ID=9152821
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| LU74588A LU74588A1 (cg-RX-API-DMAC10.html) | 1975-03-20 | 1976-03-18 |
Country Status (9)
| Country | Link |
|---|---|
| US (1) | US4039766A (cg-RX-API-DMAC10.html) |
| BE (1) | BE839687A (cg-RX-API-DMAC10.html) |
| DE (1) | DE2611472C3 (cg-RX-API-DMAC10.html) |
| ES (1) | ES446088A1 (cg-RX-API-DMAC10.html) |
| FR (1) | FR2305080A1 (cg-RX-API-DMAC10.html) |
| GB (1) | GB1538907A (cg-RX-API-DMAC10.html) |
| IT (1) | IT1057450B (cg-RX-API-DMAC10.html) |
| LU (1) | LU74588A1 (cg-RX-API-DMAC10.html) |
| NL (1) | NL184448C (cg-RX-API-DMAC10.html) |
Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2543861C3 (de) * | 1975-10-01 | 1981-06-25 | Nixdorf Computer Ag, 4790 Paderborn | Schaltung für eine zweirichtungsverstärkeranordnung in Fernmeldeanlagen, insbesondere Datenübertragungsanlagen, zur Sperrung des jeweiligen Verstärkereingangs gegen die Aufnahme abgehender Signale |
| FR2372554A1 (fr) * | 1976-11-25 | 1978-06-23 | Jeumont Schneider | Equipement de ligne d'abonne pour central telephonique |
| US4142075A (en) * | 1977-10-11 | 1979-02-27 | Burr-Brown Research Corporation | Interface circuit and method for telephone extension lines |
| US4241239A (en) * | 1978-02-24 | 1980-12-23 | International Telephone And Telegraph Corporation | Fluxbucking line transformer with electronic equivalent line terminating impedance |
| CA1123131A (en) * | 1978-02-28 | 1982-05-04 | Michael C.J. Cowpland | Transformerless trunk circuit |
| FR2422296A1 (fr) * | 1978-04-03 | 1979-11-02 | Duret Christian | Translateur electronique destine a un equipement de ligne d'abonne d'un reseau telephonique du genre spatial a points de connexion electroniques ou du genre temporel et circuit quadripole actif constituant un composant de ce translateur |
| FR2478908B1 (cg-RX-API-DMAC10.html) * | 1980-03-21 | 1984-08-03 | Thomson Csf Mat Tel | |
| DE3142201C2 (de) * | 1981-01-23 | 1984-02-23 | Mitel Corp., Kanata, Ontario | Gabelschaltung für eine Fernmelde-, insbesondere Fernsprechanlage |
| US4373118A (en) * | 1981-06-08 | 1983-02-08 | Bell Telephone Laboratories, Incorporated | Battery feed circuit |
| SE430197B (sv) * | 1982-02-09 | 1983-10-24 | Ellemtel Utvecklings Ab | Elektroniskt externlinjeoverdrag |
| AT384337B (de) * | 1982-07-22 | 1987-10-27 | Alcatel Austria Ag | Schnittstellenschaltung mit zweidraht-vierdraht- umsetzung fuer fernsprechvermittlungsanlagen |
| FR2564678B1 (fr) * | 1984-05-18 | 1986-09-12 | Thomson Csf Mat Tel | Interface de liaison de circuit d'abonne pour autocommutateur telephonique |
| HU193107B (en) * | 1985-03-29 | 1987-08-28 | Bhg Hiradastech Vallalat | Circuit arrangement for making circuit of main route, in particular to digital sub-exchanges |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT274904B (de) * | 1965-10-12 | 1969-10-10 | Western Electric Co | Teilnehmerschaltung zum Verbinden der Sprechadern von Fernsprech-Teilnehmerstellen mit Vermittlungsnetzwerk-Sprechadern |
| DE2019395B2 (de) * | 1970-04-22 | 1980-06-12 | Telefonbau Und Normalzeit Gmbh, 6000 Frankfurt | Elektronische Gabelschaltung in Signaluebertragungsanlagen,insbesondere Fernsprechanlagen |
| US3987257A (en) * | 1975-05-29 | 1976-10-19 | International Telephone And Telegraph Corporation | Optically coupled two-wire to four-wire hybrid lines |
-
1975
- 1975-03-20 FR FR7508696A patent/FR2305080A1/fr active Granted
-
1976
- 1976-03-16 ES ES446088A patent/ES446088A1/es not_active Expired
- 1976-03-17 US US05/667,838 patent/US4039766A/en not_active Expired - Lifetime
- 1976-03-17 NL NLAANVRAGE7602761,A patent/NL184448C/xx not_active IP Right Cessation
- 1976-03-17 BE BE1007263A patent/BE839687A/xx not_active IP Right Cessation
- 1976-03-18 LU LU74588A patent/LU74588A1/xx unknown
- 1976-03-18 DE DE2611472A patent/DE2611472C3/de not_active Expired
- 1976-03-18 IT IT48652/76A patent/IT1057450B/it active
- 1976-03-19 GB GB11193/76A patent/GB1538907A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR2305080B1 (cg-RX-API-DMAC10.html) | 1979-06-08 |
| NL184448C (nl) | 1989-07-17 |
| US4039766A (en) | 1977-08-02 |
| ES446088A1 (es) | 1977-06-01 |
| NL184448B (nl) | 1989-02-16 |
| NL7602761A (nl) | 1976-09-22 |
| FR2305080A1 (fr) | 1976-10-15 |
| DE2611472B2 (de) | 1978-11-30 |
| DE2611472C3 (de) | 1985-03-14 |
| DE2611472A1 (de) | 1976-09-23 |
| BE839687A (fr) | 1976-07-16 |
| IT1057450B (it) | 1982-03-10 |
| GB1538907A (en) | 1979-01-24 |