DK228787A - Anlaeg til foroegelse af telefonliniers samtalekapacitet - Google Patents
Anlaeg til foroegelse af telefonliniers samtalekapacitetInfo
- Publication number
- DK228787A DK228787A DK228787A DK228787A DK228787A DK 228787 A DK228787 A DK 228787A DK 228787 A DK228787 A DK 228787A DK 228787 A DK228787 A DK 228787A DK 228787 A DK228787 A DK 228787A
- Authority
- DK
- Denmark
- Prior art keywords
- plant
- capacity
- telephone line
- increase telephone
- increase
- Prior art date
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
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Reduction Or Emphasis Of Bandwidth Of Signals (AREA)
- Interface Circuits In Exchanges (AREA)
- Communication Cables (AREA)
- Dc Digital Transmission (AREA)
- Time-Division Multiplex Systems (AREA)
- Telephonic Communication Services (AREA)
- Transmission Systems Not Characterized By The Medium Used For Transmission (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US06/773,358 US4755994A (en) | 1985-09-06 | 1985-09-06 | Capacity expander for telephone line |
PCT/US1986/001834 WO1987001542A1 (en) | 1985-09-06 | 1986-09-05 | Capacity expander for telephone line |
Publications (2)
Publication Number | Publication Date |
---|---|
DK228787D0 DK228787D0 (da) | 1987-05-05 |
DK228787A true DK228787A (da) | 1987-05-05 |
Family
ID=25097997
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DK228787A DK228787A (da) | 1985-09-06 | 1987-05-05 | Anlaeg til foroegelse af telefonliniers samtalekapacitet |
Country Status (11)
Country | Link |
---|---|
US (1) | US4755994A (xx) |
EP (1) | EP0236445A4 (xx) |
JP (1) | JPS63500767A (xx) |
KR (1) | KR910008755B1 (xx) |
AU (1) | AU585782B2 (xx) |
BR (1) | BR8606857A (xx) |
CA (1) | CA1256616A (xx) |
DK (1) | DK228787A (xx) |
ES (1) | ES2002477A6 (xx) |
IL (1) | IL79961A (xx) |
WO (1) | WO1987001542A1 (xx) |
Families Citing this family (13)
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 |
EP0512174B1 (en) * | 1991-05-08 | 1997-02-26 | Semaphore, Inc. | Parallel rule-based data transmission method and apparatus |
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)
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 |
DE3174560D1 (en) * | 1981-07-28 | 1986-06-12 | Ibm | Transmission method for voice and digital data and arrangement for carrying out said method |
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 |
JPS61500049A (ja) * | 1983-08-16 | 1986-01-09 | ザ・ヴアリアブル・スピ−チ・コントロ−ル・カンパニイ(ヴイエスシイ) | ダイヤル通話狭帯域伝送用の音声圧縮可聴チヤネルのスタツキング |
IL79775A (en) * | 1985-08-23 | 1990-06-10 | Republic Telcom Systems Corp | Multiplexed digital packet telephone system |
-
1985
- 1985-09-06 US US06/773,358 patent/US4755994A/en not_active Expired - Fee Related
-
1986
- 1986-09-05 ES ES8601682A patent/ES2002477A6/es not_active Expired
- 1986-09-05 WO PCT/US1986/001834 patent/WO1987001542A1/en not_active Application Discontinuation
- 1986-09-05 BR BR8606857A patent/BR8606857A/pt unknown
- 1986-09-05 JP JP61504796A patent/JPS63500767A/ja active Pending
- 1986-09-05 CA CA000517615A patent/CA1256616A/en not_active Expired
- 1986-09-05 AU AU63352/86A patent/AU585782B2/en not_active Ceased
- 1986-09-05 EP EP19860905627 patent/EP0236445A4/en not_active Withdrawn
- 1986-09-07 IL IL79961A patent/IL79961A/xx not_active IP Right Cessation
-
1987
- 1987-05-04 KR KR8770389A patent/KR910008755B1/ko active IP Right Grant
- 1987-05-05 DK DK228787A patent/DK228787A/da unknown
Also Published As
Publication number | Publication date |
---|---|
ES2002477A6 (es) | 1988-08-16 |
EP0236445A4 (en) | 1988-05-03 |
DK228787D0 (da) | 1987-05-05 |
AU585782B2 (en) | 1989-06-22 |
KR880700561A (ko) | 1988-03-15 |
IL79961A (en) | 1990-03-19 |
EP0236445A1 (en) | 1987-09-16 |
WO1987001542A1 (en) | 1987-03-12 |
KR910008755B1 (en) | 1991-10-19 |
CA1256616A (en) | 1989-06-27 |
BR8606857A (pt) | 1987-11-03 |
AU6335286A (en) | 1987-03-24 |
US4755994A (en) | 1988-07-05 |
JPS63500767A (ja) | 1988-03-17 |
IL79961A0 (en) | 1986-12-31 |
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