the optional gbic fiber optic ports are ideal for uplinking to a network backbone or network server via 1000base-sx, 1000base-lx or 1000base-lh fiber optic cable. these ports operate at 1000 mbps in full duplex mode only. gbic port modules can be installed or taken out without powering off or disconnecting the switch.

   

    figure 4-3 gigabit uplink connection