×

Communication bus controller including designation of primary and secondary status according to slot position

  • US 6,675,242 B2
  • Filed: 03/17/2001
  • Issued: 01/06/2004
  • Est. Priority Date: 03/17/2001
  • Status: Expired due to Term
First Claim
Patent Images

1. A communications system comprising:

  • one or more communication buses implemented on a backplane having one or more interface slots;

    one or more controller cards communicating with the communication buses through said one or more interface slots, each controller card comprising;

    a controller; and

    at least two independent communication channels provided for connecting a host with said one or more communication buses, wherein the controller determines and designate the status of said one or more controller cards such that;

    a first controller card is designated to have primary status if the first controller card is inserted in a first interface slot while remaining interface slots are empty;

    the first controller card in said first slot retains primary status while one or more controller cards are added or removed from said remaining slots; and

    a second controller card having a non-primary status inserted in a second interface slot assumes primary status after a power interruption, if the second interface slot is designated as the slot to assume primary status after a power interruption.

View all claims
  • 4 Assignments
Timeline View
Assignment View
    ×
    ×