IT975315B - Circuito di tenuta di linea telefo nica - Google Patents

Circuito di tenuta di linea telefo nica

Info

Publication number
IT975315B
IT975315B IT70308/72A IT7030872A IT975315B IT 975315 B IT975315 B IT 975315B IT 70308/72 A IT70308/72 A IT 70308/72A IT 7030872 A IT7030872 A IT 7030872A IT 975315 B IT975315 B IT 975315B
Authority
IT
Italy
Prior art keywords
telefo
nica
line sealing
sealing circuit
circuit
Prior art date
Application number
IT70308/72A
Other languages
English (en)
Original Assignee
Gen Datacomm Ind Inc
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 Gen Datacomm Ind Inc filed Critical Gen Datacomm Ind Inc
Application granted granted Critical
Publication of IT975315B publication Critical patent/IT975315B/it

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/42—Systems providing special services or facilities to subscribers
    • H04M3/58—Arrangements for transferring received calls from one subscriber to another; Arrangements affording interim conversations between either the calling or the called party and a third party

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Networks Using Active Elements (AREA)
  • Amplifiers (AREA)
  • Devices For Supply Of Signal Current (AREA)
IT70308/72A 1971-11-15 1972-10-20 Circuito di tenuta di linea telefo nica IT975315B (it)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US19878971A 1971-11-15 1971-11-15

Publications (1)

Publication Number Publication Date
IT975315B true IT975315B (it) 1974-07-20

Family

ID=22734855

Family Applications (1)

Application Number Title Priority Date Filing Date
IT70308/72A IT975315B (it) 1971-11-15 1972-10-20 Circuito di tenuta di linea telefo nica

Country Status (8)

Country Link
US (1) US3789803A (it)
JP (1) JPS5742260B2 (it)
BE (1) BE788085A (it)
CA (1) CA961185A (it)
DE (1) DE2248682A1 (it)
FR (1) FR2160366B3 (it)
GB (1) GB1395239A (it)
IT (1) IT975315B (it)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3965308A (en) * 1973-07-09 1976-06-22 San/Bar Corporation Line card circuit
US4203006A (en) * 1978-04-20 1980-05-13 Prentice Corporation Direct access coupler
DE2947283B1 (de) * 1979-11-20 1981-06-11 Krone Gmbh, 1000 Berlin Verlustfreie automatische Verpolungsschutzvorrichtung
US4500754A (en) * 1981-01-15 1985-02-19 Novation, Inc. Solid state off hook phone line load
JPH0238550Y2 (it) * 1981-03-30 1990-10-17
US4373118A (en) * 1981-06-08 1983-02-08 Bell Telephone Laboratories, Incorporated Battery feed circuit
US4644103A (en) * 1985-06-04 1987-02-17 Base Ten Systems, Inc. Tone-responsive circuit for activating an instrumentality interfacing system

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3448393A (en) * 1965-07-27 1969-06-03 Foxboro Co Means for error correction
US3465259A (en) * 1966-09-27 1969-09-02 Us Army Low drift d-c operational amplifier
US3629514A (en) * 1970-02-02 1971-12-21 G T E Automatic Electric Lab I Subscriber{40 s holding circuit

Also Published As

Publication number Publication date
BE788085A (fr) 1973-02-28
DE2248682A1 (de) 1973-05-24
FR2160366B3 (it) 1975-10-03
US3789803A (en) 1974-02-05
GB1395239A (en) 1975-05-21
JPS5742260B2 (it) 1982-09-08
FR2160366A1 (it) 1973-06-29
JPS4859707A (it) 1973-08-22
CA961185A (en) 1975-01-14

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