ES2002477A6 - Un ampliador de linea para una linea telefonica - Google Patents

Un ampliador de linea para una linea telefonica

Info

Publication number
ES2002477A6
ES2002477A6 ES8601682A ES8601682A ES2002477A6 ES 2002477 A6 ES2002477 A6 ES 2002477A6 ES 8601682 A ES8601682 A ES 8601682A ES 8601682 A ES8601682 A ES 8601682A ES 2002477 A6 ES2002477 A6 ES 2002477A6
Authority
ES
Spain
Prior art keywords
telephone line
signals
transmitted
bandwidth
expander
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
ES8601682A
Other languages
English (en)
Inventor
Lester H Staples
James M Kresse
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.)
Republic Telcom Systems Corp
Original Assignee
Republic Telcom Systems Corp
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 Republic Telcom Systems Corp filed Critical Republic Telcom Systems Corp
Publication of ES2002477A6 publication Critical patent/ES2002477A6/es
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J3/00—Time-division multiplex systems
    • H04J3/18—Time-division multiplex systems using frequency compression and subsequent expansion of the individual signals
    • 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
    • H04B1/66—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 for reducing bandwidth of signals; for improving efficiency of transmission
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J99/00—Subject matter not provided for in other groups of this subclass
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q5/00—Selecting arrangements wherein two or more subscriber stations are connected by the same line to the exchange
    • H04Q5/24—Selecting arrangements wherein two or more subscriber stations are connected by the same line to the exchange for two-party-line systems

Abstract

UN AMPLIADOR DE LINEA PARA UNA LINEA TELEFONICA PRIVADA QUE RECIBE DOS ENTRADAS DE VOZ ANALOGICAS, EN DONDE AMBAS SEÑALES DE ENTRADA SON DIGITALIZADAS, COMPRIMIDAS USANDO EMPALME DE PERIODO PLENO Y CONVERTIDAS DE NUEVO EN FORMA ANALOGICA PARA TRANSMISION. UNA ES DESPLAZADA A LA MITAD SUPERIOR DE LA ANCHURA DE BANDA DE LA LINEA TELEFONICA Y LA OTRA PERMANECE EN LA MITAD INFERIOR. AMBAS SON TRANSMITIDAS A LA MISMA LINEA TELEFONICA, Y CUANDO SE RECIBEN AMBAS SEÑALES, SON EXPANDIDAS A LA ANCHURA DE BANDA TELEFONICA NORMAL Y SE PUEDEN CONECTAR A DOS TELEFONOS DIFERENTES. SE TRANSMITEN SEÑALES DTMF (SEÑALES DE TONO DOBLE Y FRECUENCIA MULTIPLE) CON CADA TRANSMISION DE VOZ.
ES8601682A 1985-09-06 1986-09-05 Un ampliador de linea para una linea telefonica Expired ES2002477A6 (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US06/773,358 US4755994A (en) 1985-09-06 1985-09-06 Capacity expander for telephone line

Publications (1)

Publication Number Publication Date
ES2002477A6 true ES2002477A6 (es) 1988-08-16

Family

ID=25097997

Family Applications (1)

Application Number Title Priority Date Filing Date
ES8601682A Expired ES2002477A6 (es) 1985-09-06 1986-09-05 Un ampliador de linea para una linea telefonica

Country Status (11)

Country Link
US (1) US4755994A (es)
EP (1) EP0236445A4 (es)
JP (1) JPS63500767A (es)
KR (1) KR910008755B1 (es)
AU (1) AU585782B2 (es)
BR (1) BR8606857A (es)
CA (1) CA1256616A (es)
DK (1) DK228787A (es)
ES (1) ES2002477A6 (es)
IL (1) IL79961A (es)
WO (1) WO1987001542A1 (es)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4675863A (en) 1985-03-20 1987-06-23 International Mobile Machines Corp. Subscriber RF telephone system for providing multiple speech and/or data signals simultaneously over either a single or a plurality of RF channels
DE3721478A1 (de) * 1987-06-30 1989-01-12 Thomson Brandt Gmbh Verfahren zur uebertragung und/oder aufzeichnung und wiedergabe von digitalisierten audiosignalen
CA1340064C (en) * 1988-06-08 1998-09-29 Mitsuo Kakuishi Signal processing apparatus with dual parallel a/d and d/a converters
US5459729C1 (en) * 1989-07-25 2002-03-19 Raychem Corp Digital added main line system
JPH03226051A (ja) * 1990-01-31 1991-10-07 Fujitsu Ltd 変復調器の速度通知方式
US5034742A (en) * 1990-06-19 1991-07-23 The United States Of America As Represented By The Secretary Of The Navy Message compression encoder and encoding method for a communication channel
ATE149276T1 (de) * 1991-05-08 1997-03-15 Semaphore Inc Gerät und verfahren zur parallelen und regelgestützten datenübertragung
US5546383A (en) 1993-09-30 1996-08-13 Cooley; David M. Modularly clustered radiotelephone system
US5610922A (en) * 1995-03-20 1997-03-11 Raychem Corporation Voice plus 4-wire DDS multiplexer
US5668814A (en) * 1995-03-20 1997-09-16 Raychem Corporation Dual DDS data multiplexer
US5691718A (en) * 1995-06-07 1997-11-25 Raychem Corporation Dual 4-wire analog data multiplexer
US6282204B1 (en) 1997-12-19 2001-08-28 Terayon Communication Systems, Inc. ISDN plus voice multiplexer system
US7080017B2 (en) * 2002-05-31 2006-07-18 Ken Scott Fisher Frequency compander for a telephone line

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4058676A (en) * 1975-07-07 1977-11-15 International Communication Sciences Speech analysis and synthesis system
US4110560A (en) * 1977-11-23 1978-08-29 Gte Sylvania Incorporated Communication apparatus
US4270025A (en) * 1979-04-09 1981-05-26 The United States Of America As Represented By The Secretary Of The Navy Sampled speech compression system
FR2463549A1 (fr) * 1979-08-10 1981-02-20 Telecommunications Sa Dispositif de reduction du debit numerique d'informations codees
US4381428A (en) * 1981-05-11 1983-04-26 The United States Of America As Represented By The Secretary Of The Navy Adaptive quantizer for acoustic binary information transmission
EP0070949B1 (fr) * 1981-07-28 1986-05-07 International Business Machines Corporation Procédé de transmission voix et données numériques et dispositif de mise en oeuvre dudit procédé
US4379949A (en) * 1981-08-10 1983-04-12 Motorola, Inc. Method of and means for variable-rate coding of LPC parameters
FI822880L (fi) * 1982-08-19 1984-02-20 Puumalaisen Tutkimuslaitos Oy Foerfarande och anordning foer styrning och fokusering av en tomografiapparat
FR2533473A1 (fr) * 1982-09-28 1984-03-30 Detalle Richard Mode de controle et d'ouverture des orifices de coulee des recipients conteneurs de metaux liquides et autres, et dispositif de mise en oeuvre
DE3485390D1 (de) * 1983-08-16 1992-02-06 Variable Speech Control Tonfrequenzkanalschichtung mit sprachkompression fuer schmalbanduebertragung fuer gewaehlte anrufe.
IL79775A (en) * 1985-08-23 1990-06-10 Republic Telcom Systems Corp Multiplexed digital packet telephone system

Also Published As

Publication number Publication date
AU585782B2 (en) 1989-06-22
EP0236445A1 (en) 1987-09-16
CA1256616A (en) 1989-06-27
EP0236445A4 (en) 1988-05-03
BR8606857A (pt) 1987-11-03
IL79961A (en) 1990-03-19
JPS63500767A (ja) 1988-03-17
KR910008755B1 (en) 1991-10-19
IL79961A0 (en) 1986-12-31
AU6335286A (en) 1987-03-24
KR880700561A (ko) 1988-03-15
US4755994A (en) 1988-07-05
DK228787D0 (da) 1987-05-05
WO1987001542A1 (en) 1987-03-12
DK228787A (da) 1987-05-05

Similar Documents

Publication Publication Date Title
ES2002477A6 (es) Un ampliador de linea para una linea telefonica
EP0380315A3 (en) Tv phone communication system and apparatus therefor
EP0849971A3 (en) Digital added main line system
WO1999041890A3 (en) Telephone network interface bridge between data telephony networks and dedicated connection telephony networks
ES2174423T3 (es) Telefono movil con receptor gps y electrodos ecg.
TW234804B (es)
MX9800570A (es) Sistema de comunicaciones telefonicas con linea de energia que tiene un dispositivo digital para el envio de mensajes en la banda de voces con el auricular colgado.
ES2083545T3 (es) Procedimiento de multiplexado-desmultiplexado numerico multiflujo.
CA2006140A1 (en) Communication device connected to telephone line together with telephone set
ES8605347A1 (es) Una estacion de abonado telefonico
CA1135425A (en) Signal multiplexing circuit
EP0359231A3 (en) Cordless telephone communication system
ES8707060A1 (es) Sistema de comunicacion telefonica de linea unica
GB1401670A (en) Data transmission modems having testing means
CA2210069A1 (en) Method for initiating a telephone call on a remote line
ATE204417T1 (de) Netzungebundene telekommunikationsanlage
AU535624B2 (en) Digital telephone station
FR2271725A1 (en) Telephonic conference system with speech detector - enables speech from one participant to block all other transmissions
MY110037A (en) A two-handset cordless telephone system
NO953791D0 (no) Selvdiagnostisk system for cellular-sender/mottakersystem
GB1257878A (es)
ES8608253A1 (es) Un telefono sin cables
FR2592541A1 (fr) Terminal telephonique de teleconference.
FR2450541A1 (fr) Reseau de connexion pour conference telephonique en mia
MY112264A (en) Digital transmission system

Legal Events

Date Code Title Description
FD1A Patent lapsed

Effective date: 20001204