ES2101638A1 - Terminal celular fijo para servicios de telecomunicaciones a dos hilos. - Google Patents
Terminal celular fijo para servicios de telecomunicaciones a dos hilos.Info
- Publication number
- ES2101638A1 ES2101638A1 ES09402067A ES9402067A ES2101638A1 ES 2101638 A1 ES2101638 A1 ES 2101638A1 ES 09402067 A ES09402067 A ES 09402067A ES 9402067 A ES9402067 A ES 9402067A ES 2101638 A1 ES2101638 A1 ES 2101638A1
- Authority
- ES
- Spain
- Prior art keywords
- wire conversion
- echo suppressor
- conversion circuit
- gsm
- telephone terminal
- 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.)
- Granted
Links
- 230000001413 cellular effect Effects 0.000 title abstract 3
- 238000006243 chemical reaction Methods 0.000 abstract 3
- 101100165799 Arabidopsis thaliana CYP86A2 gene Proteins 0.000 abstract 1
- 230000000694 effects Effects 0.000 abstract 1
- 238000010295 mobile communication Methods 0.000 abstract 1
Classifications
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
- G10L19/00—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis
- G10L19/012—Comfort noise or silence coding
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
- H04B3/02—Details
- H04B3/20—Reducing echo effects or singing; Opening or closing transmitting path; Conditioning for transmission in one direction or the other
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Audiology, Speech & Language Pathology (AREA)
- Human Computer Interaction (AREA)
- Computational Linguistics (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Computer Networks & Wireless Communication (AREA)
- Mobile Radio Communication Systems (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
- Filters That Use Time-Delay Elements (AREA)
- Interface Circuits In Exchanges (AREA)
Abstract
TERMINAL CELULAR FIJO PARA SERVICIOS DE TELECOMUNICACIONES A DOS HILOS. PARA ACCEDER A UNA RED DE COMUNICACIONES MOVILES DEL TIPO GSM Y PROVEER DE SERVICIOS BASICOS DE TELECOMUNICACIONES A UN TERMINAL TELEFONICO (TT) CONECTADO A EL. SE DERIVA DE UN TERMINAL CELULAR MOVIL GSM CON UN INTERFAZ DE LINEA QUE COMPRENDE UN CIRCUITO DE CONVERSION A DOS HILOS (H) CONECTADO A LAS VIAS DE TRANSMISION (TP) Y DE RECEPCION (RP), Y A LA LINEA DE ABONADO DONDE SE CONECTA EL TERMINAL TELEFONICO (TT), Y REALIZAR ASI UNA CONVERSION DE CUATRO A DOS HILOS. COMPRENDE ADEMAS UN SUPRESOR DE ECO (ES) PREVIO AL CIRCUITO DE CONVERSION A DOS HILOS (H), QUE COMPRENDE DOS ATENUADORES DE SEÑAL (ATT1, ATT2) INCLUIDOS EN LAS VIAS DE TRANSMISION Y RECEPCION, ACTIVADOS POR MEDIOS DE CONTROL DE ATENUACION (ATTC) QUE RECIBEN SENDAS SEÑALES PROCEDENTES DEL DETECTOR DE ACTIVIDAD DE VOZ Y DEL DETECTOR DE TRAMAS DE SILENCIO PRESENTES EN LOS TERMINALES CELULARES TIPO GSM.
Priority Applications (8)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ES09402067A ES2101638B1 (es) | 1994-09-30 | 1994-09-30 | Terminal celular fijo para servicios de telecomunicaciones a dos hilos. |
AU30382/95A AU703600B2 (en) | 1994-09-30 | 1995-09-01 | A fixed cellular terminal |
NZ272929A NZ272929A (en) | 1994-09-30 | 1995-09-05 | Fixed terminal interfaces between cellular network and telephone terminal |
EP95114186A EP0704988A2 (en) | 1994-09-30 | 1995-09-09 | Cellular terminal with echo suppressor |
CN95117376A CN1129888A (zh) | 1994-09-30 | 1995-09-29 | 用于二线式电信业务的固定式蜂窝终端 |
ZA958232A ZA958232B (en) | 1994-09-30 | 1995-09-29 | Fixed cellular terminal for two-wire telecommunications services |
JP7253807A JPH08195700A (ja) | 1994-09-30 | 1995-09-29 | 2線電気通信サービス用固定セルラ端末装置 |
CA002159577A CA2159577A1 (en) | 1994-09-30 | 1995-09-29 | Fixed cellular terminal for two-wire telecommunications services |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ES09402067A ES2101638B1 (es) | 1994-09-30 | 1994-09-30 | Terminal celular fijo para servicios de telecomunicaciones a dos hilos. |
Publications (2)
Publication Number | Publication Date |
---|---|
ES2101638A1 true ES2101638A1 (es) | 1997-07-01 |
ES2101638B1 ES2101638B1 (es) | 1998-03-01 |
Family
ID=8287609
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
ES09402067A Expired - Lifetime ES2101638B1 (es) | 1994-09-30 | 1994-09-30 | Terminal celular fijo para servicios de telecomunicaciones a dos hilos. |
Country Status (8)
Country | Link |
---|---|
EP (1) | EP0704988A2 (es) |
JP (1) | JPH08195700A (es) |
CN (1) | CN1129888A (es) |
AU (1) | AU703600B2 (es) |
CA (1) | CA2159577A1 (es) |
ES (1) | ES2101638B1 (es) |
NZ (1) | NZ272929A (es) |
ZA (1) | ZA958232B (es) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ES2113320B1 (es) * | 1996-05-30 | 1999-01-16 | Alcatel Standard Electrica | Dispositivo supresor del eco. |
US6163608A (en) * | 1998-01-09 | 2000-12-19 | Ericsson Inc. | Methods and apparatus for providing comfort noise in communications systems |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2245459A (en) * | 1990-06-20 | 1992-01-02 | Motorola Inc | Echo canceller with adaptive voice switch attenuation |
US5353348A (en) * | 1993-05-14 | 1994-10-04 | Jrc International, Inc. | Double echo cancelling system |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4918725A (en) * | 1987-11-25 | 1990-04-17 | Nec Corporation | Terminal impedance setting circuit for a two-wire to four-wire converting circuit |
US5249225A (en) * | 1991-10-25 | 1993-09-28 | Coherent Communications Systems Corp. | Self-balancing hybrid using digitally programmable attenuator for variable impedance elements |
-
1994
- 1994-09-30 ES ES09402067A patent/ES2101638B1/es not_active Expired - Lifetime
-
1995
- 1995-09-01 AU AU30382/95A patent/AU703600B2/en not_active Ceased
- 1995-09-05 NZ NZ272929A patent/NZ272929A/en unknown
- 1995-09-09 EP EP95114186A patent/EP0704988A2/en not_active Withdrawn
- 1995-09-29 JP JP7253807A patent/JPH08195700A/ja active Pending
- 1995-09-29 ZA ZA958232A patent/ZA958232B/xx unknown
- 1995-09-29 CN CN95117376A patent/CN1129888A/zh active Pending
- 1995-09-29 CA CA002159577A patent/CA2159577A1/en not_active Abandoned
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2245459A (en) * | 1990-06-20 | 1992-01-02 | Motorola Inc | Echo canceller with adaptive voice switch attenuation |
US5353348A (en) * | 1993-05-14 | 1994-10-04 | Jrc International, Inc. | Double echo cancelling system |
Also Published As
Publication number | Publication date |
---|---|
CA2159577A1 (en) | 1996-03-31 |
ES2101638B1 (es) | 1998-03-01 |
AU3038295A (en) | 1996-04-18 |
AU703600B2 (en) | 1999-03-25 |
ZA958232B (en) | 1996-04-24 |
JPH08195700A (ja) | 1996-07-30 |
EP0704988A2 (en) | 1996-04-03 |
NZ272929A (en) | 1998-08-26 |
CN1129888A (zh) | 1996-08-28 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
EC2A | Search report published |
Date of ref document: 19970701 Kind code of ref document: A1 Effective date: 19970701 |