ZA706849B - Two-wire to four-wire conversion circuit for a data switching centre - Google Patents
Two-wire to four-wire conversion circuit for a data switching centreInfo
- Publication number
- ZA706849B ZA706849B ZA706849A ZA706849A ZA706849B ZA 706849 B ZA706849 B ZA 706849B ZA 706849 A ZA706849 A ZA 706849A ZA 706849 A ZA706849 A ZA 706849A ZA 706849 B ZA706849 B ZA 706849B
- Authority
- ZA
- South Africa
- Prior art keywords
- wire
- conversion circuit
- switching centre
- data switching
- wire conversion
- Prior art date
Links
Classifications
-
- 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
- H04B1/581—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 a transformer
-
- 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
- H04B1/586—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 an electronic circuit
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q3/00—Selecting arrangements
- H04Q3/42—Circuit arrangements for indirect selecting controlled by common circuits, e.g. register controller, marker
- H04Q3/52—Circuit arrangements for indirect selecting controlled by common circuits, e.g. register controller, marker using static devices in switching stages, e.g. electronic switching arrangements
- H04Q3/521—Circuit arrangements for indirect selecting controlled by common circuits, e.g. register controller, marker using static devices in switching stages, e.g. electronic switching arrangements using semiconductors in the switching stages
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Power Engineering (AREA)
- Amplifiers (AREA)
- Electronic Switches (AREA)
- Interface Circuits In Exchanges (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR6935622A FR2063475A5 (de) | 1969-10-17 | 1969-10-17 |
Publications (1)
Publication Number | Publication Date |
---|---|
ZA706849B true ZA706849B (en) | 1971-07-28 |
Family
ID=9041684
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
ZA706849A ZA706849B (en) | 1969-10-17 | 1970-10-08 | Two-wire to four-wire conversion circuit for a data switching centre |
Country Status (8)
Country | Link |
---|---|
US (1) | US3689710A (de) |
BE (1) | BE757529A (de) |
CH (1) | CH558616A (de) |
DE (1) | DE2050742C3 (de) |
ES (1) | ES384624A1 (de) |
FR (1) | FR2063475A5 (de) |
GB (1) | GB1268038A (de) |
ZA (1) | ZA706849B (de) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2157150A5 (de) * | 1971-10-20 | 1973-06-01 | Labo Cent Telecommunicat | |
FR2437116A1 (fr) * | 1978-09-19 | 1980-04-18 | Thomson Ericsson Telephones So | Dispositif de separation et d'equilibrage pour autocommutateurs telephoniques |
GB2042848B (en) * | 1978-12-30 | 1983-01-06 | Plessey Co Ltd | Line current feed and hybrid arrangement (sytem x) |
NL7903797A (nl) * | 1979-05-15 | 1980-11-18 | Philips Nv | Vorkschakeling. |
SE461367B (sv) * | 1989-02-10 | 1990-02-05 | Nokia Data Systems | Naetarrangemang foer dataoeverfoering |
WO1993009612A1 (en) * | 1991-10-30 | 1993-05-13 | Raychem Corporation | Alarm and test system with improved coupling circuit for a digital added main line |
US7098719B2 (en) * | 2003-10-09 | 2006-08-29 | Siemens Aktiengesellschaft | Multiplexer with clock suppression |
US11631523B2 (en) | 2020-11-20 | 2023-04-18 | Analog Devices International Unlimited Company | Symmetric split planar transformer |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2733303A (en) * | 1951-08-02 | 1956-01-31 | Koenig | |
US2810081A (en) * | 1955-09-27 | 1957-10-15 | Gen Dynamics Corp | Electronic switch for selectively blocking or permitting the simultaneous transmission of signals in two channels |
US3108157A (en) * | 1959-06-15 | 1963-10-22 | Bell Telephone Labor Inc | Multiple station communication circuit |
US3540049A (en) * | 1967-10-26 | 1970-11-10 | Bell Telephone Labor Inc | Hybridless signal transfer circuits |
-
1969
- 1969-10-17 FR FR6935622A patent/FR2063475A5/fr not_active Expired
-
1970
- 1970-10-08 ZA ZA706849A patent/ZA706849B/xx unknown
- 1970-10-12 US US79777A patent/US3689710A/en not_active Expired - Lifetime
- 1970-10-13 CH CH1510670A patent/CH558616A/fr not_active IP Right Cessation
- 1970-10-15 DE DE2050742A patent/DE2050742C3/de not_active Expired
- 1970-10-15 BE BE757529D patent/BE757529A/xx unknown
- 1970-10-16 GB GB49306/70A patent/GB1268038A/en not_active Expired
- 1970-10-16 ES ES384624A patent/ES384624A1/es not_active Expired
Also Published As
Publication number | Publication date |
---|---|
CH558616A (fr) | 1975-01-31 |
DE2050742A1 (de) | 1971-06-09 |
FR2063475A5 (de) | 1971-07-09 |
DE2050742B2 (de) | 1978-05-11 |
ES384624A1 (es) | 1973-01-16 |
DE2050742C3 (de) | 1979-01-04 |
BE757529A (fr) | 1971-04-15 |
GB1268038A (en) | 1972-03-22 |
US3689710A (en) | 1972-09-05 |
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