BR8702641A - Disposicao de circuito de assinante telefonico - Google Patents

Disposicao de circuito de assinante telefonico

Info

Publication number
BR8702641A
BR8702641A BR8702641A BR8702641A BR8702641A BR 8702641 A BR8702641 A BR 8702641A BR 8702641 A BR8702641 A BR 8702641A BR 8702641 A BR8702641 A BR 8702641A BR 8702641 A BR8702641 A BR 8702641A
Authority
BR
Brazil
Prior art keywords
circuit arrangement
telephone subscriber
subscriber circuit
telephone
arrangement
Prior art date
Application number
BR8702641A
Other languages
English (en)
Inventor
Helmuth Beck
Erik Mally
Original Assignee
Siemens Ag
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 Siemens Ag filed Critical Siemens Ag
Publication of BR8702641A publication Critical patent/BR8702641A/pt

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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
    • H04B1/40—Circuits
    • H04B1/54—Circuits using the same frequency for two directions of communication
    • H04B1/58—Hybrid arrangements, i.e. arrangements for transition from single-path two-direction transmission to single-direction transmission on each of two paths or vice versa
    • H04B1/583—Hybrid arrangements, i.e. arrangements for transition from single-path two-direction transmission to single-direction transmission on each of two paths or vice versa using a bridge network
BR8702641A 1986-05-23 1987-05-22 Disposicao de circuito de assinante telefonico BR8702641A (pt)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT0138086A AT386307B (de) 1986-05-23 1986-05-23 Fernsprechteilnehmerschaltung

Publications (1)

Publication Number Publication Date
BR8702641A true BR8702641A (pt) 1988-02-23

Family

ID=3512628

Family Applications (1)

Application Number Title Priority Date Filing Date
BR8702641A BR8702641A (pt) 1986-05-23 1987-05-22 Disposicao de circuito de assinante telefonico

Country Status (9)

Country Link
US (1) US4914693A (pt)
EP (1) EP0246546B1 (pt)
AR (1) AR241564A1 (pt)
AT (2) AT386307B (pt)
BR (1) BR8702641A (pt)
DE (1) DE3770335D1 (pt)
DK (1) DK257187A (pt)
FI (1) FI85930C (pt)
PT (1) PT84929B (pt)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2642593B1 (fr) * 1989-01-31 1991-04-12 Cit Alcatel Dispositif electronique de raccordement de ligne d'abonne
US4922531A (en) * 1989-04-19 1990-05-01 Northern Telecom Limited Line interface circuit
DE3942757A1 (de) * 1989-12-23 1991-06-27 Standard Elektrik Lorenz Ag Summierverstaerker mit einem komplexen gewichtungsfaktor und schnittstelle mit einem solchen summierverstaerker
DE3942758A1 (de) * 1989-12-23 1991-06-27 Standard Elektrik Lorenz Ag Nachbildung einer komplexen impedanz und schnittstelle mit einer solchen nachbildung
JP2999214B2 (ja) * 1990-03-02 2000-01-17 株式会社東芝 伝送入出力回路
DE69024947T2 (de) * 1990-05-11 1996-08-08 Alcatel Nv Impedanz-Synthese durch vielfache Schleife, die filternde Mittel verwendet
US5333192A (en) * 1990-06-26 1994-07-26 Northern Telecom Limited Line interface circuit
US5202919A (en) * 1990-09-04 1993-04-13 Tollgrade Communications, Inc. Metallic channel unit network
US5457743A (en) * 1990-09-04 1995-10-10 Tollgrade Communications, Inc. Metallic channel unit network
US5586181A (en) * 1990-09-04 1996-12-17 Tollgrade Communications, Inc. Metallic channel unit network
US5602912A (en) * 1994-05-16 1997-02-11 Silicon Systems, Inc. Telephone hybrid circuit

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE152178C (pt) *
GB1257878A (pt) * 1970-04-10 1971-12-22
FR2160308B1 (pt) * 1971-11-19 1977-01-28 Labo Cent Telecommunicat
US4053722A (en) * 1976-10-04 1977-10-11 The United States Of America As Represented By The Secretary Of The Navy Solid state two-wire/four-wire converter with common battery
NL7810086A (nl) * 1978-10-06 1980-04-09 Philips Nv Voedingsbrug voor een abonneestroomloop.
US4283604A (en) * 1979-06-04 1981-08-11 Tellabs, Inc. Current source circuits with common mode noise rejection
FR2478908B1 (pt) * 1980-03-21 1984-08-03 Thomson Csf Mat Tel
US4387273A (en) * 1980-08-25 1983-06-07 International Telephone And Telegraph Corporation Subscriber line interface circuit with impedance synthesizer
CA1154185A (en) * 1981-01-23 1983-09-20 Patrick R. Beirne Subscriber line interface circuit
CA1200335A (en) * 1984-02-13 1986-02-04 Stanley D. Rosenbaum Active impedance line feed circuit
JPS61244191A (ja) * 1985-04-22 1986-10-30 Nec Corp 加入者回路

Also Published As

Publication number Publication date
EP0246546B1 (de) 1991-05-29
AT386307B (de) 1988-08-10
PT84929A (de) 1987-06-01
DK257187D0 (da) 1987-05-21
DK257187A (da) 1987-11-24
US4914693A (en) 1990-04-03
AR241564A1 (es) 1992-08-31
EP0246546A1 (de) 1987-11-25
FI872277A (fi) 1987-11-24
FI872277A0 (fi) 1987-05-22
FI85930B (fi) 1992-02-28
PT84929B (pt) 1990-02-08
ATE64052T1 (de) 1991-06-15
ATA138086A (de) 1987-12-15
FI85930C (fi) 1992-06-10
DE3770335D1 (de) 1991-07-04

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Legal Events

Date Code Title Description
MM Lapse due to non-payment of fees (art. 50)