SE7509044L - DATA COMMUNICATION SYSTEM - Google Patents

DATA COMMUNICATION SYSTEM

Info

Publication number
SE7509044L
SE7509044L SE7509044A SE7509044A SE7509044L SE 7509044 L SE7509044 L SE 7509044L SE 7509044 A SE7509044 A SE 7509044A SE 7509044 A SE7509044 A SE 7509044A SE 7509044 L SE7509044 L SE 7509044L
Authority
SE
Sweden
Prior art keywords
modem
data
data communication
tone signal
appearance
Prior art date
Application number
SE7509044A
Other languages
Unknown language ( )
Swedish (sv)
Other versions
SE399165B (en
Inventor
C W Roedel
R Borysiewicz
Original Assignee
Milgo Electronic 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 Milgo Electronic Corp filed Critical Milgo Electronic Corp
Publication of SE7509044L publication Critical patent/SE7509044L/en
Publication of SE399165B publication Critical patent/SE399165B/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/20—Arrangements for detecting or preventing errors in the information received using signal quality detector
    • 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
    • H04L25/03006—Arrangements for removing intersymbol interference
    • H04L25/03012—Arrangements for removing intersymbol interference operating in the time domain
    • H04L25/03114—Arrangements for removing intersymbol interference operating in the time domain non-adaptive, i.e. not adjustable, manually adjustable, or adjustable only during the reception of special signals
    • H04L25/03133—Arrangements for removing intersymbol interference operating in the time domain non-adaptive, i.e. not adjustable, manually adjustable, or adjustable only during the reception of special signals with a non-recursive structure
    • 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
    • H04L25/03006—Arrangements for removing intersymbol interference
    • H04L2025/03592—Adaptation methods
    • H04L2025/03598—Algorithms
    • H04L2025/03611—Iterative algorithms
    • H04L2025/03656—Initialisation
    • H04L2025/03662—Initialisation to a fixed value

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Quality & Reliability (AREA)
  • Power Engineering (AREA)
  • Maintenance And Management Of Digital Transmission (AREA)
  • Communication Control (AREA)
  • Telephonic Communication Services (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)

Abstract

1522663 Data communication systems MILGO ELECTRONIC CORP 11 July 1975 29192/75 Heading H4P A data communication system comprises a first modem A arranged for transmitting data messages from a first data terminal A through a transmission line and a second modem B to a second data terminal B, modem A comprising means arranged to transmit to modem B, immediately before each data message, a sequence of pre-message control signals of which one is a tone signal of predetermined frequency (see Figs. 3-4), and modem B comprising means for detecting the appearance of signals from the line to activate a sampling and testing circuit which when activated samples the last said signals during a predetermined interval of time, testing for the appearance of the tone signal therein, and providing a first or a second output signal when the tone signal is present or absent respectively. The second output signal indicates that a data dropout has occurred. The system is described in detail w.r.t. Figs. 2,5-12 (not shown).
SE7509044A 1975-07-11 1975-08-12 DATA COMMUNICATION SYSTEM SE399165B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2919275A GB1522663A (en) 1975-07-11 1975-07-11 Data modems with automatic equalization drop-out detection and data echo protection

Publications (2)

Publication Number Publication Date
SE7509044L true SE7509044L (en) 1977-02-13
SE399165B SE399165B (en) 1978-01-30

Family

ID=10287623

Family Applications (1)

Application Number Title Priority Date Filing Date
SE7509044A SE399165B (en) 1975-07-11 1975-08-12 DATA COMMUNICATION SYSTEM

Country Status (5)

Country Link
CA (1) CA1038977A (en)
DE (1) DE2532414A1 (en)
FR (1) FR2320668A1 (en)
GB (1) GB1522663A (en)
SE (1) SE399165B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2920575C2 (en) * 1979-05-21 1981-09-17 Siemens AG, 1000 Berlin und 8000 München Digital telecommunications system with at least one four-wire line section
JP2682703B2 (en) * 1989-07-21 1997-11-26 富士通株式会社 Multipoint connection modem retraining method

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3550005A (en) * 1968-03-01 1970-12-22 Milgo Electronic Corp Equalization circuit
US3566271A (en) * 1969-02-18 1971-02-23 Int Communications Corp Automatic equilization for multiple polled stations
US3742360A (en) * 1969-11-18 1973-06-26 Milgo Electronic Corp Automatic equalizer circuit
US3644830A (en) * 1969-11-18 1972-02-22 Milgo Electronic Corp Data modem having phase frequency and amplitude distortion compensating means
US3760277A (en) * 1971-05-17 1973-09-18 Milgo Electronic Corp Coding and decoding system with multi-level format

Also Published As

Publication number Publication date
FR2320668B1 (en) 1982-11-12
CA1038977A (en) 1978-09-19
DE2532414A1 (en) 1977-02-10
GB1522663A (en) 1978-08-23
SE399165B (en) 1978-01-30
FR2320668A1 (en) 1977-03-04

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