IL79961A - Capacity expander for telephone line - Google Patents

Capacity expander for telephone line

Info

Publication number
IL79961A
IL79961A IL79961A IL7996186A IL79961A IL 79961 A IL79961 A IL 79961A IL 79961 A IL79961 A IL 79961A IL 7996186 A IL7996186 A IL 7996186A IL 79961 A IL79961 A IL 79961A
Authority
IL
Israel
Prior art keywords
telephone line
capacity expander
expander
capacity
telephone
Prior art date
Application number
IL79961A
Other languages
English (en)
Other versions
IL79961A0 (en
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 IL79961A0 publication Critical patent/IL79961A0/xx
Publication of IL79961A publication Critical patent/IL79961A/xx

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)
IL79961A 1985-09-06 1986-09-07 Capacity expander for telephone line IL79961A (en)

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 (2)

Publication Number Publication Date
IL79961A0 IL79961A0 (en) 1986-12-31
IL79961A true IL79961A (en) 1990-03-19

Family

ID=25097997

Family Applications (1)

Application Number Title Priority Date Filing Date
IL79961A IL79961A (en) 1985-09-06 1986-09-07 Capacity expander for telephone line

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) DK228787D0 (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
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)

* 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
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
EP0155285B1 (en) * 1983-08-16 1991-12-27 The Variable Speech Control Company ("VSC") Audio channel stacking with speech compression for narrow band transmission with provision for dialed calls
IL79775A (en) * 1985-08-23 1990-06-10 Republic Telcom Systems Corp Multiplexed digital packet telephone system

Also Published As

Publication number Publication date
ES2002477A6 (es) 1988-08-16
AU6335286A (en) 1987-03-24
BR8606857A (pt) 1987-11-03
JPS63500767A (ja) 1988-03-17
EP0236445A1 (en) 1987-09-16
WO1987001542A1 (en) 1987-03-12
DK228787A (da) 1987-05-05
IL79961A0 (en) 1986-12-31
KR880700561A (ko) 1988-03-15
US4755994A (en) 1988-07-05
KR910008755B1 (en) 1991-10-19
DK228787D0 (da) 1987-05-05
EP0236445A4 (en) 1988-05-03
CA1256616A (en) 1989-06-27
AU585782B2 (en) 1989-06-22

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Legal Events

Date Code Title Description
KB Patent renewed
KB Patent renewed
MM9K Patent not in force due to non-payment of renewal fees