Ethernet Switch User ManualManual-ESUL4-FL1_Series_HW-Rev0611BCopyright © KBC Networks Ltd. Page 13 of 17 www.kbcnetworks.com3.3 Fiber Port TestingAs shown in Figure 3.2, connect two ESUL4-FL1 units via their fiber ports. Thenattach a computer to any RJ45 port on each device and send the “ping” commandbetween the connected computers. If both computers get the command withoutpacket loss and the corresponding ACT indicators of the fiber ports flash, this thenshows the fiber ports under test are functioning correctly.PC1 PC2Figure 3.2 Fiber port testing