Motorola WiNG 4.4 Reference Manual page 531

Min RTT Displays the quickest round trip time for ping packets transmitted from the
switch to its destination IP address. This may reflect the time when data
traffic was at its lowest for the two devices.
Max RTT Displays the longest round trip time for ping packets transmitted from the
switch to its destination IP address. This may reflect the time when data
traffic was at its most congested for the two devices.
Average RTT Displays the average round trip time for ping packets transmitted between
the switch and its destination IP address. Use this value as a general
baseline (along with packets sent vs packets received) for the overall
connection and association potential between the switch and target
device.
Last Response Displays the time (in seconds) the switch last "heard" the destination IP
address over the switch managed network. Use this time (in contention
with the RTT values displayed) to determine whether this device warrants
a permanent switch connection.
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