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BE858816A - DEVELOPMENT AT TELECOMMUNICATION CENTRALS - Google Patents

DEVELOPMENT AT TELECOMMUNICATION CENTRALS

Info

Publication number
BE858816A
BE858816A BE181006A BE181006A BE858816A BE 858816 A BE858816 A BE 858816A BE 181006 A BE181006 A BE 181006A BE 181006 A BE181006 A BE 181006A BE 858816 A BE858816 A BE 858816A
Authority
BE
Belgium
Prior art keywords
centrals
telecommunication
development
telecommunication centrals
Prior art date
Application number
BE181006A
Other languages
French (fr)
Original Assignee
Gen Electric Co 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 Gen Electric Co Ltd filed Critical Gen Electric Co Ltd
Publication of BE858816A publication Critical patent/BE858816A/en

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)
BE181006A 1976-09-17 1977-09-16 DEVELOPMENT AT TELECOMMUNICATION CENTRALS BE858816A (en)

Applications Claiming Priority (1)

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

Publications (1)

Publication Number Publication Date
BE858816A true BE858816A (en) 1978-01-16

Family

ID=10404250

Family Applications (1)

Application Number Title Priority Date Filing Date
BE181006A BE858816A (en) 1976-09-17 1977-09-16 DEVELOPMENT AT TELECOMMUNICATION CENTRALS

Country Status (8)

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

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0385084A3 (en) * 1989-01-27 1990-11-22 BASF Aktiengesellschaft Plant protection agents containing 1-aryl or 1-hetaryl imidazole carbonic-acid esters

Families Citing this family (3)

* 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
US5274703A (en) * 1991-05-23 1993-12-28 At&T Bell Laboratories Automatic loss control circuit

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1299735B (en) * 1965-08-04 1969-07-24 Siemens Ag Circuit arrangement for telephone systems, in particular private branch exchanges with telephone stations, which have an automatic attenuation compensation
DE1287650C2 (en) * 1966-10-18 1976-02-26 Standard Elektrik Lorenz Ag, 7000 Stuttgart PROCEDURE AND CIRCUIT ARRANGEMENT FOR CONTROLLING THE CONNECTION ESTABLISHMENT DEPENDING ON INFORMATION ABOUT THE CONNECTING CABLE
US3781481A (en) * 1971-09-30 1973-12-25 Stromberg Carlson Corp Amplifier select and control circuit
DE2250651B2 (en) * 1972-10-16 1975-06-19 Telefonbau Und Normalzeit Gmbh, 6000 Frankfurt Circuit arrangement for attenuation compensation in a private branch exchange with four-wire connection paths
DE2347696C3 (en) * 1973-09-21 1978-12-21 Siemens Ag, 1000 Berlin Und 8000 Muenchen Circuit arrangement for feeding subscriber lines in telephone switching systems
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

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0385084A3 (en) * 1989-01-27 1990-11-22 BASF Aktiengesellschaft Plant protection agents containing 1-aryl or 1-hetaryl imidazole carbonic-acid esters

Also Published As

Publication number Publication date
FR2365252B1 (en) 1982-03-26
ZA775490B (en) 1978-07-26
CA1089131A (en) 1980-11-04
GB1584778A (en) 1981-02-18
DE2741667C2 (en) 1987-09-24
NL7710118A (en) 1978-03-21
FR2365252A1 (en) 1978-04-14
SE425537B (en) 1982-10-04
DE2741667A1 (en) 1978-03-23
SE7710346L (en) 1978-03-18

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Legal Events

Date Code Title Description
RE Patent lapsed

Owner name: GEC PLESSEY TELECOMMUNICATIONS LTD

Effective date: 19920930