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
Application number
NO820366A
Other languages
English (en)
Other versions
NO820366L (no
NO153590B (no
Inventor
Samuel Frederick Wood
Original Assignee
Northern Telecom Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Northern Telecom Ltd filed Critical Northern Telecom Ltd
Publication of NO820366L publication Critical patent/NO820366L/no
Publication of NO153590B publication Critical patent/NO153590B/no
Publication of NO153590C publication Critical patent/NO153590C/no

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

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Power Engineering (AREA)
  • Interface Circuits In Exchanges (AREA)
  • Devices For Supply Of Signal Current (AREA)
  • Communication Control (AREA)
NO820366A 1981-02-09 1982-02-08 Sambandslinje-grensesnitt for sammenkobling av en totr¨ds sambandslinje med en telefonsentral. NO153590C (no)

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)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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

Also Published As

Publication number Publication date
JPS57148456A (en) 1982-09-13
US4361732A (en) 1982-11-30
NO820366L (no) 1982-08-10
CA1160780A (en) 1984-01-17
NO153590B (no) 1986-01-06
EP0058470A1 (en) 1982-08-25
EP0058470B1 (en) 1986-03-26

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