Transmitting data between a host computer and a terminal...

H - Electricity – 04 – L

Patent

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Details

H04L 29/06 (2006.01) G06F 9/445 (2006.01) G06F 15/163 (2006.01) H04L 12/12 (2006.01)

Patent

CA 2230785

There is described a method of using a terminal computer (30) to send instructions to a host computer (22) through a public network (14) to open and close application programs and for transmitting data between the application programs and the terminal computer through the public network (14). In order to open application programs, the terminal computer establishes an initial connection between the two computers and instructions are sent over this initial connection to open application programs. The host computer establishes an additional connection for each application program. In the terminal computer, a respective terminal emulator window is created for each additional connection. For each application program, data is transmitted over the respective additional connection using a character-based protocol. In the terminal computer, the data is converted from the character-based format to a bit-mapped graphical format and then displayed in the respective terminal emulator window.

Le procédé décrit permet d'utiliser un ordinateur satellite (30) pour envoyer des instructions à un ordinateur hôte (22) par l'intermédiaire d'un réseau public (14) pour ouvrir et fermer des programmes d'application et pour transmettre des données entre les programmes d'application et l'ordinateur satellite via le réseau public (14). Pour ouvrir les programmes d'application, l'ordinateur satellite établit une connexion initiale entre les deux ordinateurs et les instructions d'ouverture des programmes d'application sont envoyées sur cette connexion initiale. L'ordinateur hôte établit une connexion supplémentaire pour chaque programme d'application. Dans l'ordinateur satellite, une fenêtre d'émulateur de terminal est créée pour chaque connexion supplémentaire. Pour chaque programme d'application, les données sont transmises sur la connexion supplémentaire correspondante à l'aide d'un protocole à caractères. Dans l'ordinateur satellite, les données sont converties du format à caractères en format graphique en mode point, puis affichées dans la fenêtre d'émulateur de terminal correspondante.

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