Patent ID: 6487591
Filing Date: 2002-11-26
Classification: H04L

Abstract:
A communications system comprising:a signal redirection element comprising a first memory location and a second memory location; a first subsystem comprising a first memory element, the first memory element storing an address stored in the first memory location, the first subsystem operable to receive communications addressed to the address stored in the first memory clement; a second subsystem comprising a second memory element, the second memory element storing an address stored in the second memory location, the second subsystem operable to receive communications addressed to the address stored in the second memory element; and the signal redirection element operable to store an active subsystem address in the first memory location and to store a standby subsystem address in the second memory location, such that the first subsystem acts in an active status and the second subsystem acts in a standby status, the signal redirection element further operable to sense a prompt to change active status of the first subsystem, and, responsive to sensing the prompt, to store the active subsystem address in the second memory location and to store the standby subsystem address in the first memory location, the change of addresses in the signal redirection element mirrored in the first memory element and the second memory element, thus swapping the active status and the standby status between the first subsystem and the second subsystem and causing the second subsystem to operate in the active status independent of the first subsystem.