HP Aruba 3810M Series Installation And Getting Started Manual page 27

An auxiliary port (USB Type A connector) for processing a USB command file and updating
switch software.
Low power operation:
◦
Ports on a switch or stack member may be set to operate at reduced power.
◦
Port status LEDs may be turned off.
◦
RJ-45 ports will operate at reduced power if the port is not connected (link partner is
not detected).
Switch Features 27