Patent ID: 9473833
Filing Date: 2016-10-18
CPC Classification: G06F,H04Q,Y02D

Claim Text:
1. A computer network, comprising: a first lower level switch; a first upper level switch; a second upper level switch; a first passive optical splitter having a first port directly coupled to the first upper level switch, a second port directly coupled to the second upper level switch, a third port, and a fourth port; a second passive optical splitter having a first port directly coupled to the fourth port of the first passive optical splitter, a second port, a third port directly coupled to the first lower level switch, and a fourth port; and a first mirror coupled to the fourth port of the second passive optical splitter and configured to reflect an optical signal received from the second passive optical splitter to the first upper level switch and second upper level switch through the second passive optical splitter and the first passive optical splitter, where each of the first passive optical splitter and the second passive optical splitter is configured to transmit signals received at one of its first port and second port as output signals on both of its third port and fourth port, and transmit signals received at one of its third port and fourth port as output signals on both of its first port and second port.