NO153590C - Sambandslinje-grensesnitt for sammenkobling av en totr¨ds sambandslinje med en telefonsentral. - Google Patents
Sambandslinje-grensesnitt for sammenkobling av en totr¨ds sambandslinje med en telefonsentral.Info
- Publication number
- NO153590C NO153590C NO820366A NO820366A NO153590C NO 153590 C NO153590 C NO 153590C NO 820366 A NO820366 A NO 820366A NO 820366 A NO820366 A NO 820366A NO 153590 C NO153590 C NO 153590C
- Authority
- NO
- Norway
- Prior art keywords
- time connection
- phone center
- connect
- connection line
- line interface
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M7/00—Arrangements for interconnection between switching centres
- H04M7/0096—Trunk circuits
-
- 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
- H04M19/003—Arrangements for compensation of the DC flux in line transformers
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US06/232,546 US4361732A (en) | 1981-02-09 | 1981-02-09 | Trunk interface circuit with current compensation |
Publications (3)
Publication Number | Publication Date |
---|---|
NO820366L NO820366L (no) | 1982-08-10 |
NO153590B NO153590B (no) | 1986-01-06 |
NO153590C true NO153590C (no) | 1986-04-16 |
Family
ID=22873577
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
NO820366A NO153590C (no) | 1981-02-09 | 1982-02-08 | Sambandslinje-grensesnitt for sammenkobling av en totr¨ds sambandslinje med en telefonsentral. |
Country Status (5)
Country | Link |
---|---|
US (1) | US4361732A (no) |
EP (1) | EP0058470B1 (no) |
JP (1) | JPS57148456A (no) |
CA (1) | CA1160780A (no) |
NO (1) | NO153590C (no) |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4563547A (en) * | 1983-03-07 | 1986-01-07 | At&T Bell Laboratories | Loop-start/ground-start line interface circuit |
US4607142A (en) * | 1984-07-27 | 1986-08-19 | Itt Corporation | Transformer flux compensation circuit |
US4731827A (en) * | 1984-10-29 | 1988-03-15 | David Systems, Inc. | Interswitch line circuit |
US4689816A (en) * | 1985-01-15 | 1987-08-25 | D.A.V.I.D. Systems, Inc. | Three relay C. O. trunk interface |
CA1241784A (en) * | 1986-04-09 | 1988-09-06 | Mitel Corporation | Circuit for switching between balanced networks |
CA1268873A (en) * | 1987-09-22 | 1990-05-08 | Mihail Stefan Augustin Traian Moisin | Line interface circuit |
US5369355A (en) * | 1992-11-12 | 1994-11-29 | B/E Aerospace | Compensation circuit for transformer linearization |
US5384681A (en) * | 1993-03-01 | 1995-01-24 | Toto Ltd. | Electrostatic chuck |
US8643218B2 (en) | 2006-06-02 | 2014-02-04 | Broadcom Corporation | Minimizing saturation caused by power transfer in a communication system transformer |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4027235A (en) * | 1976-08-13 | 1977-05-31 | Gte Automatic Electric Laboratories Incorporated | Direct current compensation circuit with current threshold detection |
US4103112A (en) * | 1977-10-17 | 1978-07-25 | Northern Telecom Limited | Telephone line circuit with differential loop current sensing and compensation |
GB2013000A (en) * | 1978-01-20 | 1979-08-01 | Hitachi Ltd Dc | D.C. magnetic field cancellation circuit |
JPS54146905A (en) * | 1978-05-10 | 1979-11-16 | Hitachi Ltd | Main wire two-way trunk |
US4243842A (en) * | 1979-04-24 | 1981-01-06 | Northern Telecom Limited | Telephone line circuit |
US4289933A (en) * | 1979-10-15 | 1981-09-15 | Bell Telephone Laboratories, Incorporated | Dial pulse detection |
-
1981
- 1981-02-09 US US06/232,546 patent/US4361732A/en not_active Expired - Lifetime
- 1981-09-08 CA CA000385353A patent/CA1160780A/en not_active Expired
-
1982
- 1982-01-20 EP EP82300292A patent/EP0058470B1/en not_active Expired
- 1982-02-05 JP JP1647582A patent/JPS57148456A/ja active Pending
- 1982-02-08 NO NO820366A patent/NO153590C/no unknown
Also Published As
Publication number | Publication date |
---|---|
EP0058470A1 (en) | 1982-08-25 |
NO153590B (no) | 1986-01-06 |
CA1160780A (en) | 1984-01-17 |
EP0058470B1 (en) | 1986-03-26 |
JPS57148456A (en) | 1982-09-13 |
US4361732A (en) | 1982-11-30 |
NO820366L (no) | 1982-08-10 |
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