CA1089131A - Mode et appareil de compensation des variations dans les appareils et les longueurs de ligne des abonnes - Google Patents

Mode et appareil de compensation des variations dans les appareils et les longueurs de ligne des abonnes

Info

Publication number
CA1089131A
CA1089131A CA286,926A CA286926A CA1089131A CA 1089131 A CA1089131 A CA 1089131A CA 286926 A CA286926 A CA 286926A CA 1089131 A CA1089131 A CA 1089131A
Authority
CA
Canada
Prior art keywords
digital
line
gain
regulator
attenuation
Prior art date
Legal status (The legal status 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 status listed.)
Expired
Application number
CA286,926A
Other languages
English (en)
Inventor
David C. A. Connolly
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
General Electric Co PLC
Original Assignee
General Electric Co PLC
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 General Electric Co PLC filed Critical General Electric Co PLC
Application granted granted Critical
Publication of CA1089131A publication Critical patent/CA1089131A/fr
Expired legal-status Critical Current

Links

Classifications

    • 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
    • H04M19/005—Feeding arrangements without the use of line transformers

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Signal Processing (AREA)
  • Interface Circuits In Exchanges (AREA)
CA286,926A 1976-09-17 1977-09-16 Mode et appareil de compensation des variations dans les appareils et les longueurs de ligne des abonnes Expired CA1089131A (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB38555/76 1976-09-17
GB38555/76A GB1584778A (en) 1976-09-17 1976-09-17 Telecommunication exchanges

Publications (1)

Publication Number Publication Date
CA1089131A true CA1089131A (fr) 1980-11-04

Family

ID=10404250

Family Applications (1)

Application Number Title Priority Date Filing Date
CA286,926A Expired CA1089131A (fr) 1976-09-17 1977-09-16 Mode et appareil de compensation des variations dans les appareils et les longueurs de ligne des abonnes

Country Status (8)

Country Link
BE (1) BE858816A (fr)
CA (1) CA1089131A (fr)
DE (1) DE2741667A1 (fr)
FR (1) FR2365252A1 (fr)
GB (1) GB1584778A (fr)
NL (1) NL7710118A (fr)
SE (1) SE425537B (fr)
ZA (1) ZA775490B (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4254305A (en) * 1979-02-07 1981-03-03 International Telephone And Telegraph Corporation Current limited subscriber line feed circuit
US4272648A (en) * 1979-11-28 1981-06-09 International Telephone And Telegraph Corporation Gain control apparatus for digital telephone line circuits
DE3902439A1 (de) * 1989-01-27 1990-08-02 Basf Ag Pflanzenschuetzende mittel auf basis von 1-aryl- bzw. 1-hetarylimidazolcarbonsaeureestern
US5274703A (en) * 1991-05-23 1993-12-28 At&T Bell Laboratories Automatic loss control circuit

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1299735B (de) * 1965-08-04 1969-07-24 Siemens Ag Schaltungsanordnung fuer Fernsprechanlagen, insbesondere Nebenstellenanlagen mit Sprechstellen, die einen selbsttaetigen Daempfungsausgleich aufweisen
US3781481A (en) * 1971-09-30 1973-12-25 Stromberg Carlson Corp Amplifier select and control circuit
DE2250651B2 (de) * 1972-10-16 1975-06-19 Telefonbau Und Normalzeit Gmbh, 6000 Frankfurt Schaltungsanordnung für den Dämpfungsausgleich in einer Nebenstellenanlage mit vierdrähtigen Verbindungswegen
DE2347696C3 (de) * 1973-09-21 1978-12-21 Siemens Ag, 1000 Berlin Und 8000 Muenchen Schaltungsanordnung zum Speisen von Teilnehmeranschlußleitungen in Fernsprechvermittlungsanlagen
US3903378A (en) * 1974-03-27 1975-09-02 Gte Automatic Electric Lab Inc Arrangement for controlling the gain of two-way amplifiers in accordance with loop lengths

Also Published As

Publication number Publication date
DE2741667A1 (de) 1978-03-23
NL7710118A (nl) 1978-03-21
FR2365252B1 (fr) 1982-03-26
DE2741667C2 (fr) 1987-09-24
SE425537B (sv) 1982-10-04
BE858816A (fr) 1978-01-16
GB1584778A (en) 1981-02-18
SE7710346L (sv) 1978-03-18
ZA775490B (en) 1978-07-26
FR2365252A1 (fr) 1978-04-14

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Legal Events

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