Patent ID: 6389022
Filing Date: 2002-05-14
Classification: H04L,H04Q

Abstract:
A method comprising:first requesting that a communication link be established between a first end unit and a second end unit, said first requesting being performed by said first end unit when said first end unit contacts a first switch unit disposed between said first end unit and said second end unit; when said communication link fails to be established by a route passing through a first port, transmitting a release signal to said first switch unit, said first port coupling a second switch unit to said second end unit, said second switch unit being disposed between said first switch unit and said second end unit; when said release signal is received, first searching for an address of a second port and then second requesting that said communication link be established, said second requesting being performed by said first switch unit and not being performed by said first end unit, wherein said second port couples said second switch unit to said second end unit; and enabling said first end unit to communicate with said second end unit along said communication link.