Patent ID: 6052805
Filing Date: 2000-04-18
Classification: H04L

Abstract:
A dual speed hub comprising:a CPU (central processing unit) for executing and controlling normal operation of parts of the dual speed hub;a plurality of I/O (input/output) ports respectively connected to network apparatus in a computer network, said I/O ports each comprising a transceiver;a first hub connected to the transceivers of said I/O ports for transmitting packet data in the computer network at a first speeda second hub connected to the transceivers of said I/O ports for transmitting packet data in the computer network at a second speed;a first MAC (media access control) for packet data transmission at the first speed of said first hub, said first MAC connecting said first hub to said CPU;a second MAC (media access control) for packet data transmission at the second speed of said second hub, said second MAC connecting said second hub to said CPU; anda switch connected between said first hub and said second hub for packet data transmission speed adjustment, enabling packet data to be accurately transmitted in the network between network apparatus of different transmission speeds;wherein said CPU periodically sends a test packet in proper order through one MAC, one hub, said switch and the other hub to the other MAC, then checks the receiving condition and the content of the test packet so as to determine the normality of the function of the switch, and then provides a warning signal to a network management system when said switch is judged abnormal, informing the network manager to repair said switch.