CA949685A - Data communications method and system - Google Patents

Data communications method and system

Info

Publication number
CA949685A
CA949685A CA106,019A CA106019A CA949685A CA 949685 A CA949685 A CA 949685A CA 106019 A CA106019 A CA 106019A CA 949685 A CA949685 A CA 949685A
Authority
CA
Canada
Prior art keywords
data communications
communications method
data
communications
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
CA106,019A
Other languages
English (en)
Other versions
CA106019S (en
Inventor
William I. Graham
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.)
International Business Machines Corp
Original Assignee
International Business Machines 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 International Business Machines Corp filed Critical International Business Machines Corp
Application granted granted Critical
Publication of CA949685A publication Critical patent/CA949685A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/42—Loop networks
    • H04L12/423—Loop networks with centralised control, e.g. polling

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Small-Scale Networks (AREA)
  • Communication Control (AREA)
CA106,019A 1970-03-16 1971-02-23 Data communications method and system Expired CA949685A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US1968070A 1970-03-16 1970-03-16

Publications (1)

Publication Number Publication Date
CA949685A true CA949685A (en) 1974-06-18

Family

ID=21794485

Family Applications (1)

Application Number Title Priority Date Filing Date
CA106,019A Expired CA949685A (en) 1970-03-16 1971-02-23 Data communications method and system

Country Status (7)

Country Link
US (1) US3632881A (xx)
JP (1) JPS5118139B1 (xx)
CA (1) CA949685A (xx)
DE (1) DE2108835B2 (xx)
FR (1) FR2083972A5 (xx)
GB (1) GB1288195A (xx)
SE (1) SE363684B (xx)

Families Citing this family (29)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5027706B1 (xx) * 1970-11-09 1975-09-09
US3732374A (en) * 1970-12-31 1973-05-08 Ibm Communication system and method
US3810100A (en) * 1971-12-16 1974-05-07 Collins Radio Co Looped direct switching system
US3755786A (en) * 1972-04-27 1973-08-28 Ibm Serial loop data transmission system
FR2192752A5 (xx) * 1972-07-10 1974-02-08 Ibm France
US3790717A (en) * 1972-08-07 1974-02-05 Adaptive Tech Telephone communications system with distributed control
FR2216729B2 (xx) * 1973-02-06 1978-09-08 Ibm France
US4000378A (en) * 1974-02-04 1976-12-28 Burroughs Corporation Data communication system having a large number of terminals
FR2275944A1 (fr) * 1974-06-21 1976-01-16 Suchard Jean Systeme de transmission de messages entre plusieurs stations
US3921137A (en) * 1974-06-25 1975-11-18 Ibm Semi static time division multiplex slot assignment
US3961139A (en) * 1975-05-14 1976-06-01 International Business Machines Corporation Time division multiplexed loop communication system with dynamic allocation of channels
SE393723B (sv) * 1975-09-18 1977-05-16 Philips Svenska Ab Sett att overfora data mellan en centralstation och ett antal terminalstationer via en sluten serieoverforingsslinga samt anleggning for utforande av settet
JPS6040051B2 (ja) * 1976-01-19 1985-09-09 ハネウエル・インコ−ポレ−テツド プリンタ制御方式
US4086534A (en) * 1977-02-14 1978-04-25 Network Systems Corporation Circuit for wire transmission of high frequency data communication pulse signals
US4186380A (en) * 1977-10-21 1980-01-29 Minnesota Mining And Manufacturing Company Multi-terminal computer system with dual communication channels
NO791842L (no) * 1978-06-05 1979-12-06 Fmc Corp Databussystem.
US4486852A (en) * 1978-06-05 1984-12-04 Fmc Corporation Synchronous time-shared data bus system
DE2917675A1 (de) * 1979-04-27 1980-11-06 Hertz Inst Heinrich Digitales zeitmultiplex-nachrichtensystem
JPS5951186B2 (ja) * 1979-10-19 1984-12-12 日本電信電話株式会社 制御装置
DE2951927C2 (de) * 1979-12-21 1982-04-15 Siemens AG, 1000 Berlin und 8000 München Verfahren zur Erzeugung einer Impulsfolge mit einstellbarer Frequenz und Schaltungsanordnungen zur Durchführung des Verfahrens
US4689740A (en) * 1980-10-31 1987-08-25 U.S. Philips Corporation Two-wire bus-system comprising a clock wire and a data wire for interconnecting a number of stations
US4627070A (en) * 1981-09-16 1986-12-02 Fmc Corporation Asynchronous data bus system
US4456957A (en) * 1981-09-28 1984-06-26 Ncr Corporation Apparatus using a decision table for routing data among terminals and a host system
US4511969A (en) * 1983-05-20 1985-04-16 At&T Information Systems Inc. Control channel interface circuit
FR2558320B1 (fr) * 1983-12-21 1986-04-18 Philips Ind Commerciale Dispositif pour connecter en serie une pluralite de dispositifs electroniques emetteurs
GB8515347D0 (en) * 1985-06-18 1985-07-17 Plessey Co Plc Telecommunications exchanges
US5062035A (en) * 1986-06-24 1991-10-29 Kabushiki Kaisha Toshiba Time slot allocation for loop networks
US6064803A (en) * 1995-03-01 2000-05-16 Matsushita Electric Industrial Co., Ltd. Image information decoder with a reduced capacity frame memory
JP4181283B2 (ja) * 1999-09-29 2008-11-12 株式会社日立製作所 障害検出通知方法及びインターネットワーク装置

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3519750A (en) * 1967-08-15 1970-07-07 Ultronic Systems Corp Synchronous digital multiplex communication system including switchover
US3544976A (en) * 1968-07-02 1970-12-01 Collins Radio Co Digitalized communication system with computation and control capabilities employing transmission line loop for data transmission
US3529089A (en) * 1968-08-28 1970-09-15 Bell Telephone Labor Inc Distributed subscriber carrier-concentrator system

Also Published As

Publication number Publication date
JPS5118139B1 (xx) 1976-06-08
DE2108835B2 (de) 1972-04-20
SE363684B (xx) 1974-01-28
DE2108835A1 (de) 1971-10-14
FR2083972A5 (xx) 1971-12-17
GB1288195A (xx) 1972-09-06
US3632881A (en) 1972-01-04

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