ES449644A1 - Un dispositivo electronico para recibir y transmitir senalestelefonicas. - Google Patents

Un dispositivo electronico para recibir y transmitir senalestelefonicas.

Info

Publication number
ES449644A1
ES449644A1 ES449644A ES449644A ES449644A1 ES 449644 A1 ES449644 A1 ES 449644A1 ES 449644 A ES449644 A ES 449644A ES 449644 A ES449644 A ES 449644A ES 449644 A1 ES449644 A1 ES 449644A1
Authority
ES
Spain
Prior art keywords
signal
line
output
equalization
network
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
ES449644A
Other languages
English (en)
Spanish (es)
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.)
Nokia Spain SA
Original Assignee
Alcatel Espana SA
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 Alcatel Espana SA filed Critical Alcatel Espana SA
Publication of ES449644A1 publication Critical patent/ES449644A1/es
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/0264—Arrangements for coupling to transmission lines
    • H04L25/0292—Arrangements specific to the receiver end
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/0264—Arrangements for coupling to transmission lines
    • H04L25/0272—Arrangements for coupling to multiple lines, e.g. for differential transmission
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/0264—Arrangements for coupling to transmission lines
    • H04L25/028—Arrangements specific to the transmitter end
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
    • H04L25/03878—Line equalisers; line build-out devices
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/738—Interface circuits for coupling substations to external telephone lines
    • H04M1/76—Compensating for differences in line impedance
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/0264—Arrangements for coupling to transmission lines
    • H04L25/0266—Arrangements for providing Galvanic isolation, e.g. by means of magnetic or capacitive coupling

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Power Engineering (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Interface Circuits In Exchanges (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Telephone Set Structure (AREA)
  • Amplifiers (AREA)
ES449644A 1975-07-08 1976-07-07 Un dispositivo electronico para recibir y transmitir senalestelefonicas. Expired ES449644A1 (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US05/594,026 US4002852A (en) 1975-07-08 1975-07-08 Electronic telephone network

Publications (1)

Publication Number Publication Date
ES449644A1 true ES449644A1 (es) 1977-07-01

Family

ID=24377215

Family Applications (1)

Application Number Title Priority Date Filing Date
ES449644A Expired ES449644A1 (es) 1975-07-08 1976-07-07 Un dispositivo electronico para recibir y transmitir senalestelefonicas.

Country Status (21)

Country Link
US (1) US4002852A (2)
JP (1) JPS5210006A (2)
AT (1) AT356718B (2)
AU (1) AU504325B2 (2)
BE (1) BE843895A (2)
BR (1) BR7604480A (2)
CA (1) CA1061491A (2)
DE (1) DE2629993A1 (2)
DK (1) DK306276A (2)
ES (1) ES449644A1 (2)
FI (1) FI63141C (2)
FR (1) FR2317832A1 (2)
GB (1) GB1532889A (2)
IT (1) IT1075009B (2)
MX (1) MX143012A (2)
NL (1) NL7607301A (2)
NO (1) NO144554C (2)
NZ (1) NZ181349A (2)
PT (1) PT65339B (2)
SE (1) SE419393B (2)
ZA (1) ZA763729B (2)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4178484A (en) * 1977-06-27 1979-12-11 Vincent Ogden W Long line telephone system with an amplifying substation
US4391513A (en) * 1979-12-25 1983-07-05 Canon Kabushiki Kaisha Range finding optical mechanism
JPS5710598A (en) * 1980-06-20 1982-01-20 Sony Corp Transmitting circuit of microphone output
US4536888A (en) * 1981-08-21 1985-08-20 Plantronics, Inc. Voice communication instrument system with line-powered receiver conditioning circuit
EP0078355B1 (fr) * 1981-10-28 1985-07-31 International Business Machines Corporation Circuit d'interface comportant des moyens d'adaptation d'impédance
FR2526252B1 (fr) * 1982-05-03 1986-12-19 Constr Telephoniques Circuit de commande du courant d'une ligne de transmission
JPS61237794A (ja) * 1985-04-15 1986-10-23 日本国土開発株式会社 大断面スリツト造成工法
GB2181324B (en) * 1985-10-07 1989-02-01 Motorola Inc Telephone circuits
DE3640127A1 (de) * 1986-11-25 1988-06-01 Standard Elektrik Lorenz Ag Elektronische gabelschaltung
FR2610774B1 (fr) * 1987-02-10 1989-05-26 Telephonie Ind Commerciale Dispositif electronique a seuil pour microphone a efficacite electrique lineaire de poste ou terminal telephonique
JPH03292658A (ja) * 1990-04-09 1991-12-24 Matsushita Electric Ind Co Ltd 磁気記録再生装置
US5282157A (en) * 1990-09-13 1994-01-25 Telecom Analysis Systems, Inc. Input impedance derived from a transfer network
KR100200967B1 (ko) * 1996-06-26 1999-06-15 윤종용 전화라인의 감쇄신호 보상장치 및 방법
SE509626C2 (sv) * 1997-06-06 1999-02-15 Ericsson Telefon Ab L M Förfarande för att reglera signalutrymmet i en abonnentlinjekrets jämte abonnentlinjekrets
US6782096B1 (en) * 1998-11-12 2004-08-24 Paradyne Corporation Subscriber line driver and termination

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3691311A (en) * 1970-12-10 1972-09-12 Pacific Plantronics Inc Telephone user set
SE339704B (2) * 1970-12-22 1971-10-18 Ericsson Telefon Ab L M
US3751602A (en) * 1971-08-13 1973-08-07 Bell Telephone Labor Inc Loudspeaking telephone
GB1406663A (en) * 1972-08-22 1975-09-17 Standard Telephones Cables Ltd Telphone subset circuits
SE365375B (2) * 1972-12-18 1974-03-18 Ericsson Telefon Ab L M
US3889059A (en) * 1973-03-26 1975-06-10 Northern Electric Co Loudspeaking communication terminal apparatus and method of operation
JPS5435725B2 (2) * 1974-04-17 1979-11-05

Also Published As

Publication number Publication date
FI63141C (fi) 1983-04-11
CA1061491A (en) 1979-08-28
MX143012A (es) 1981-02-10
US4002852A (en) 1977-01-11
FR2317832A1 (fr) 1977-02-04
BE843895A (nl) 1977-01-10
SE419393B (sv) 1981-07-27
NL7607301A (nl) 1977-01-11
NZ181349A (en) 1980-05-08
JPS5528629B2 (2) 1980-07-29
GB1532889A (en) 1978-11-22
AU1550976A (en) 1978-01-05
ZA763729B (en) 1977-05-25
NO144554B (no) 1981-06-09
DE2629993A1 (de) 1977-02-03
NO762341L (2) 1977-01-11
DK306276A (da) 1977-01-09
BR7604480A (pt) 1978-01-31
ATA497376A (de) 1979-10-15
AU504325B2 (en) 1979-10-11
JPS5210006A (en) 1977-01-26
FR2317832B1 (2) 1983-02-18
FI762002A7 (2) 1977-01-09
PT65339A (en) 1976-08-01
PT65339B (en) 1978-01-06
FI63141B (fi) 1982-12-31
IT1075009B (it) 1985-04-22
NO144554C (no) 1981-09-16
SE7607437L (sv) 1977-01-09
AT356718B (de) 1980-05-27

Similar Documents

Publication Publication Date Title
GB1423577A (en) Loudspeaking telephone station circuit
GB916545A (en) Improvements in or relating to loud speaking telephone sets
US5745859A (en) Portable radio telephone headphone
FI63141C (fi) Elektronisk telefonkrets
GB1310377A (en) Telephone set speech networks
US4002860A (en) Transmitting and receiving apparatus
US2702319A (en) Two-way telecommunication system
EP0030228A3 (en) Speech networks for telephone sets
US3789155A (en) Side-tone reducing circuit for a telephone subscribers instrument
ES422597A1 (es) Aparato para modificar las caracteristicas de transmision de una linea de transmision telefonica o parecida.
US2273945A (en) Two-way speech transmission
US3823273A (en) Subscriber's telephone circuit
ES362693A1 (es) Red de conversacion activa para instalaciones telefonicas.
IE45750L (en) Electronic subscriber feeding system
CA1078536A (en) Bilateral voice-signal controller for use in the two-wire portion of the telephone circuit
GB1325784A (en) Telephone circuits utilizing active elements
CN203289520U (zh) 对讲消侧音电路
US3592971A (en) Equalizing and antisidetone telephone circuit
GB1500442A (en) Subscriber telephone sets
US2655557A (en) Apparatus for use in telephone or like communication systems
US2912502A (en) Waystation employing transistor amplifier
KR930002582B1 (ko) 확성전화기의 확성기에 접속된 증폭기에 전원을 공급하기 위한 장치
GB1349734A (en) Arrangements for amplifying and reproducing audio frequency signals
JPS6115495A (ja) 電話加入者回路
GB1406243A (en) Loudspeaking telephone instruments

Legal Events

Date Code Title Description
FD1A Patent lapsed

Effective date: 19970612