ZA796287B - Line current feed circuits for telecommunication exchanges - Google Patents
Line current feed circuits for telecommunication exchangesInfo
- Publication number
- ZA796287B ZA796287B ZA00796287A ZA796287A ZA796287B ZA 796287 B ZA796287 B ZA 796287B ZA 00796287 A ZA00796287 A ZA 00796287A ZA 796287 A ZA796287 A ZA 796287A ZA 796287 B ZA796287 B ZA 796287B
- Authority
- ZA
- South Africa
- Prior art keywords
- line current
- current feed
- feed circuits
- telecommunication exchanges
- telecommunication
- 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
- H04M—TELEPHONIC COMMUNICATION
- H04M19/00—Current supply arrangements for telephone systems
- H04M19/001—Current supply source at the exchanger providing current to substations
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Power Engineering (AREA)
- Computer Networks & Wireless Communication (AREA)
- Interface Circuits In Exchanges (AREA)
- Telephonic Communication Services (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
- Telephone Function (AREA)
- Devices For Supply Of Signal Current (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB7850384A GB2042848B (en) | 1978-12-30 | 1978-12-30 | Line current feed and hybrid arrangement (sytem x) |
Publications (1)
Publication Number | Publication Date |
---|---|
ZA796287B true ZA796287B (en) | 1980-11-26 |
Family
ID=10502016
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
ZA00796287A ZA796287B (en) | 1978-12-30 | 1979-10-20 | Line current feed circuits for telecommunication exchanges |
Country Status (11)
Country | Link |
---|---|
JP (1) | JPS5593363A (nl) |
AU (1) | AU5323179A (nl) |
BR (1) | BR7907891A (nl) |
DE (1) | DE2952259A1 (nl) |
FR (1) | FR2445666A1 (nl) |
GB (1) | GB2042848B (nl) |
IE (1) | IE48895B1 (nl) |
NL (1) | NL7909148A (nl) |
NZ (1) | NZ192462A (nl) |
SE (1) | SE7910670L (nl) |
ZA (1) | ZA796287B (nl) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3007791A1 (de) * | 1980-02-29 | 1981-09-10 | Siemens AG, 1000 Berlin und 8000 München | Schaltungsanordnung zur erhoehung der induktivitaet eines uebertragers |
DE3278899D1 (en) * | 1981-04-06 | 1988-09-15 | Northern Telecom Ltd | Apparatus for coupling signals to or from a two-wire line |
DE3138726A1 (de) * | 1981-09-29 | 1983-04-07 | Siemens AG, 1000 Berlin und 8000 München | Teilnehmeranschlussschaltung fuer den anschluss zweidraehtiger teilnehmeranschlussleitungen an eine vierdraehtig durchschaltende digitale zeitmultiplexvermittlungsstelle. |
FR2552288B1 (fr) * | 1983-09-15 | 1989-03-24 | Telecommunications Sa | Joncteur d'abonne telephonique |
US4595802A (en) * | 1983-11-29 | 1986-06-17 | Northern Telecom Limited | Hybrid circuit |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2063475A5 (nl) * | 1969-10-17 | 1971-07-09 | Labo Cent Telecommunicat | |
FR2131038A5 (nl) * | 1971-03-30 | 1972-11-10 | Ass Ouvriers Instr Preci | |
FR2166696A5 (nl) * | 1972-01-04 | 1973-08-17 | Ass Ouvriers Instr Preci | |
US3955052A (en) * | 1974-11-18 | 1976-05-04 | Tadiran Israel Electronics Industries Ltd. | Subscriber unit particularly useful for time-division-multiplex system |
-
1978
- 1978-12-30 GB GB7850384A patent/GB2042848B/en not_active Expired
-
1979
- 1979-10-20 ZA ZA00796287A patent/ZA796287B/xx unknown
- 1979-11-27 AU AU53231/79A patent/AU5323179A/en not_active Abandoned
- 1979-12-04 BR BR7907891A patent/BR7907891A/pt unknown
- 1979-12-19 NL NL7909148A patent/NL7909148A/nl not_active Application Discontinuation
- 1979-12-19 NZ NZ192462A patent/NZ192462A/xx unknown
- 1979-12-24 DE DE19792952259 patent/DE2952259A1/de not_active Withdrawn
- 1979-12-27 SE SE7910670A patent/SE7910670L/ not_active Application Discontinuation
- 1979-12-27 JP JP17396679A patent/JPS5593363A/ja active Pending
- 1979-12-28 FR FR7932036A patent/FR2445666A1/fr active Granted
- 1979-12-28 IE IE2528/79A patent/IE48895B1/en unknown
Also Published As
Publication number | Publication date |
---|---|
JPS5593363A (en) | 1980-07-15 |
FR2445666B1 (nl) | 1984-10-12 |
GB2042848A (en) | 1980-09-24 |
BR7907891A (pt) | 1980-07-29 |
AU5323179A (en) | 1980-07-03 |
IE48895B1 (en) | 1985-06-12 |
GB2042848B (en) | 1983-01-06 |
SE7910670L (sv) | 1980-07-01 |
DE2952259A1 (de) | 1980-07-17 |
NZ192462A (en) | 1982-05-25 |
FR2445666A1 (fr) | 1980-07-25 |
NL7909148A (nl) | 1980-07-02 |
IE792528L (en) | 1980-06-30 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EG14128A (en) | Current limited subscriber line feed circuit | |
GB2064269B (en) | Telephone line circuit | |
GB2014398B (en) | Telephone line circuit | |
GB2064902B (en) | Telephone line circuit | |
JPS57173292A (en) | Interface circuit for telephone line | |
CS220983A2 (en) | Distribution segment especially for telephone exchanges | |
GB2050116B (en) | Telephone line circuit | |
DE3365314D1 (en) | Arrangement for supplying current to a subscriber telephone set | |
AU4642979A (en) | Circuit arrangement for telecommunications | |
GB2024564B (en) | Connecting circuit for a telephone line | |
GB2015305B (en) | Telephone line circuit | |
GB2055274B (en) | Telecommunications line circuit | |
ZA796287B (en) | Line current feed circuits for telecommunication exchanges | |
GB2064915B (en) | Telephone line feed circuit | |
JPS55150660A (en) | Connecting circuit for telephone line | |
JPS54118713A (en) | Circuit for supplying current to subscriber*s circuit | |
EP0073462A3 (en) | Subscriber line circuit | |
ZA796286B (en) | Longitudinal balance arrangements for two-to-four telecommunication line circuits | |
GB2012521B (en) | Feed bridge for telephone line | |
GB2055021B (en) | Telephone line circuit | |
GB2106345B (en) | Telephone line circuit | |
PH16522A (en) | Subscriber terminal for use in a tdm switching system | |
GB2050115B (en) | Telephone line circuit current supply arrangements | |
IL58341A0 (en) | Switching arrangement for telephone exchange | |
GB2029670B (en) | Automatic telecommunication switching system |