FR2412887A1 - Circuit d'expansion de terminaux commande a distance - Google Patents

Circuit d'expansion de terminaux commande a distance

Info

Publication number
FR2412887A1
FR2412887A1 FR7833616A FR7833616A FR2412887A1 FR 2412887 A1 FR2412887 A1 FR 2412887A1 FR 7833616 A FR7833616 A FR 7833616A FR 7833616 A FR7833616 A FR 7833616A FR 2412887 A1 FR2412887 A1 FR 2412887A1
Authority
FR
France
Prior art keywords
terminals
remote control
control terminal
expansion circuit
terminal expansion
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
Application number
FR7833616A
Other languages
English (en)
Other versions
FR2412887B1 (fr
Inventor
Kenneth E Powell
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
Publication of FR2412887A1 publication Critical patent/FR2412887A1/fr
Application granted granted Critical
Publication of FR2412887B1 publication Critical patent/FR2412887B1/fr
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
    • G06F13/38—Information transfer, e.g. on bus
    • G06F13/40—Bus structure
    • G06F13/4063—Device-to-bus coupling
    • G06F13/4068—Electrical coupling

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Selective Calling Equipment (AREA)
  • Communication Control (AREA)
  • Small-Scale Networks (AREA)

Abstract

CE CIRCUIT PERMET A N'IMPORTE LEQUEL DES TERMINAUX D'UNE PLURALITE DE TERMINAUX D'ETRE CONNECTE A UNE LIGNE DE TRANSMISSION DE DONNEES QUI NORMALEMENT NE SERT QU'A UN TERMINAL. IL VERROUILLE TOUS LES TERMINAUX SAUF CELUI QUI EST EN FONCTION DURANT LE TEMPS PRIS POUR ECHANGER LES SIGNAUX DE COMMANDE ET POUR ENTRER LES DONNEES. LES TERMINAUX SONT IDENTIFIES PAR DES TONALITES TRANSMISES SUR UNE LIGNE DE TRANSMISSION ADDITIONNELLE. APPLICATION AUX SYSTEMES DE TRAITEMENT DE DONNEES INCLUANT DES TERMINAUX DISTANTS.
FR7833616A 1977-12-23 1978-11-21 Circuit d'expansion de terminaux commande a distance Granted FR2412887A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US05/863,831 US4144584A (en) 1977-12-23 1977-12-23 Remote card operated terminal extensor circuitry

Publications (2)

Publication Number Publication Date
FR2412887A1 true FR2412887A1 (fr) 1979-07-20
FR2412887B1 FR2412887B1 (fr) 1983-06-10

Family

ID=25341888

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7833616A Granted FR2412887A1 (fr) 1977-12-23 1978-11-21 Circuit d'expansion de terminaux commande a distance

Country Status (7)

Country Link
US (1) US4144584A (fr)
JP (1) JPS5488039A (fr)
CA (1) CA1104227A (fr)
DE (1) DE2852487A1 (fr)
FR (1) FR2412887A1 (fr)
GB (1) GB2011220B (fr)
IT (1) IT1160348B (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3731282A (en) * 1971-08-27 1973-05-01 Allied Management & Systems Co Multifunction routing network
US3803419A (en) * 1972-05-01 1974-04-09 Texas Instruments Inc Optically coupled threshold monitoring system
US3833884A (en) * 1973-06-25 1974-09-03 Ibm Badge or credit card reading system with integral status monitoring

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3303472A (en) * 1962-10-08 1967-02-07 Control Data Corp System and apparatus for automatic data collection
US3314051A (en) * 1964-05-12 1967-04-11 Willcox Selective-call data system
US3898373A (en) * 1971-09-09 1975-08-05 Leo F Walsh Data communication system
US4025760A (en) * 1975-08-14 1977-05-24 Addressograph Multigraph Corporation Security means for transaction terminal system
US4025905A (en) * 1975-11-28 1977-05-24 Incoterm Corporation System for on-line processing of banking transactions

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3731282A (en) * 1971-08-27 1973-05-01 Allied Management & Systems Co Multifunction routing network
US3803419A (en) * 1972-05-01 1974-04-09 Texas Instruments Inc Optically coupled threshold monitoring system
US3833884A (en) * 1973-06-25 1974-09-03 Ibm Badge or credit card reading system with integral status monitoring

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
EXBK/78 *

Also Published As

Publication number Publication date
US4144584A (en) 1979-03-13
GB2011220B (en) 1982-02-24
IT1160348B (it) 1987-03-11
IT7830876A0 (it) 1978-12-15
DE2852487A1 (de) 1979-06-28
GB2011220A (en) 1979-07-04
CA1104227A (fr) 1981-06-30
JPS5488039A (en) 1979-07-12
FR2412887B1 (fr) 1983-06-10

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Legal Events

Date Code Title Description
ST Notification of lapse