This object reflects what is currently selected
as the visual indication mode, selected by the
mode button.
The portStatus(1) mode uses the visual LEDS
to indicate port link status.
The fullDuplex(2) mode uses the visual LEDS
to indicate that a port is running with full
duplex or half duplex or no link status.
The linkRate(3) mode uses the visual LEDS to
indicate the rate of operation on a port:
100 MBPS or 10 MBPS or no link.
The utilization(4) mode uses the visual LEDS to
indicate the utiliztion of the system as more total
bandwidth through the switch is being utilized,
more LED's are lit.