GB1584778A - Telecommunication exchanges - Google Patents

Telecommunication exchanges Download PDF

Info

Publication number
GB1584778A
GB1584778A GB38555/76A GB3855576A GB1584778A GB 1584778 A GB1584778 A GB 1584778A GB 38555/76 A GB38555/76 A GB 38555/76A GB 3855576 A GB3855576 A GB 3855576A GB 1584778 A GB1584778 A GB 1584778A
Authority
GB
United Kingdom
Prior art keywords
regulator
voltage
subscriber
exchange
line
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
GB38555/76A
Other languages
English (en)
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
Original Assignee
General Electric Co
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 filed Critical General Electric Co
Priority to GB38555/76A priority Critical patent/GB1584778A/en
Priority to ZA00775490A priority patent/ZA775490B/xx
Priority to NL7710118A priority patent/NL7710118A/xx
Priority to SE7710346A priority patent/SE425537B/xx
Priority to BE181006A priority patent/BE858816A/xx
Priority to FR7728078A priority patent/FR2365252A1/fr
Priority to CA286,926A priority patent/CA1089131A/en
Priority to DE19772741667 priority patent/DE2741667A1/de
Publication of GB1584778A publication Critical patent/GB1584778A/en
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)
GB38555/76A 1976-09-17 1976-09-17 Telecommunication exchanges Expired GB1584778A (en)

Priority Applications (8)

Application Number Priority Date Filing Date Title
GB38555/76A GB1584778A (en) 1976-09-17 1976-09-17 Telecommunication exchanges
ZA00775490A ZA775490B (en) 1976-09-17 1977-09-13 Improvements in or relating to telecommunication exchanges
NL7710118A NL7710118A (nl) 1976-09-17 1977-09-15 Telecommunicatiecentrale.
SE7710346A SE425537B (sv) 1976-09-17 1977-09-15 Sett och anordning for att kompensera for skillnader i linjeslingimpedanser i ett for tidsfordelningsmultiplex anordnat telefonsystem
BE181006A BE858816A (fr) 1976-09-17 1977-09-16 Perfectionnements aux centraux de telecommunication
FR7728078A FR2365252A1 (fr) 1976-09-17 1977-09-16 Procede et dispositif de compensation de l'attenuation en ligne dans un reseau telephonique
CA286,926A CA1089131A (en) 1976-09-17 1977-09-16 Method and apparatus for compensating for variations in subscribers line lengths and apparatus
DE19772741667 DE2741667A1 (de) 1976-09-17 1977-09-16 Verfahren und schaltungsanordnungen fuer die fernmeldevermittlung

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
GB1584778A true GB1584778A (en) 1981-02-18

Family

ID=10404250

Family Applications (1)

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

Country Status (8)

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

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5274703A (en) * 1991-05-23 1993-12-28 At&T Bell Laboratories Automatic loss control circuit

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
DE3902439A1 (de) * 1989-01-27 1990-08-02 Basf Ag Pflanzenschuetzende mittel auf basis von 1-aryl- bzw. 1-hetarylimidazolcarbonsaeureestern

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

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5274703A (en) * 1991-05-23 1993-12-28 At&T Bell Laboratories Automatic loss control circuit

Also Published As

Publication number Publication date
SE7710346L (sv) 1978-03-18
DE2741667A1 (de) 1978-03-23
ZA775490B (en) 1978-07-26
FR2365252A1 (fr) 1978-04-14
CA1089131A (en) 1980-11-04
NL7710118A (nl) 1978-03-21
FR2365252B1 (de) 1982-03-26
DE2741667C2 (de) 1987-09-24
SE425537B (sv) 1982-10-04
BE858816A (fr) 1978-01-16

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Legal Events

Date Code Title Description
PS Patent sealed
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19930909

728C Application made for restoration (sect. 28/1977)
728A Order made restoring the patent (sect. 28/1977)
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19960909