39.
    发明专利
    未知

    公开(公告)号:DE602004010111T2

    公开(公告)日:2008-09-11

    申请号:DE602004010111

    申请日:2004-05-28

    Inventor: KLEIN JOHN

    Abstract: A wireless local area network for data communications between a computer and mobile units is provided with at least two cell controllers connected to the computer and one or more rf ports each connected to a primary interface of one cell controller and to a backup interface of another cell controller. A control program in the cell controller monitors data communications between the other cell controller and the rf port by a backup interface. The program is arranged to cause the second cell controller to assume primary communications functions for the rf port in the event primary communications functions between a first cell controller and the rf port are inoperative.

    40.
    发明专利
    未知

    公开(公告)号:DE69734188D1

    公开(公告)日:2005-10-20

    申请号:DE69734188

    申请日:1997-12-22

    Abstract: The present invention relates to an improved order fulfillment system. The system is provided with improved data entry system for selecting items for purchase by a customer, and an improved item collection terminal and order delivery system. The portable terminal to be used for collecting of items is provided with an audio as well as video presentation means which are used to provide assistance to the to terminal user.

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