ZA775490B - Improvements in or relating to telecommunication exchanges - Google Patents

Improvements in or relating to telecommunication exchanges

Info

Publication number
ZA775490B
ZA775490B ZA00775490A ZA775490A ZA775490B ZA 775490 B ZA775490 B ZA 775490B ZA 00775490 A ZA00775490 A ZA 00775490A ZA 775490 A ZA775490 A ZA 775490A ZA 775490 B ZA775490 B ZA 775490B
Authority
ZA
South Africa
Prior art keywords
relating
telecommunication exchanges
telecommunication
exchanges
Prior art date
Application number
ZA00775490A
Other languages
English (en)
Inventor
D Connolly
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 ZA775490B publication Critical patent/ZA775490B/xx

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)
ZA00775490A 1976-09-17 1977-09-13 Improvements in or relating to telecommunication exchanges ZA775490B (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
ZA775490B true ZA775490B (en) 1978-07-26

Family

ID=10404250

Family Applications (1)

Application Number Title Priority Date Filing Date
ZA00775490A ZA775490B (en) 1976-09-17 1977-09-13 Improvements in or relating to telecommunication exchanges

Country Status (8)

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

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
FR2365252B1 (sv) 1982-03-26
FR2365252A1 (fr) 1978-04-14
DE2741667A1 (de) 1978-03-23
DE2741667C2 (sv) 1987-09-24
BE858816A (fr) 1978-01-16
SE425537B (sv) 1982-10-04
SE7710346L (sv) 1978-03-18
GB1584778A (en) 1981-02-18
NL7710118A (nl) 1978-03-21
CA1089131A (en) 1980-11-04

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