User`s guide

About the Harmony Power System 12
Automatic Device Detection
When a device is connected to one of the Harmony Power System’s Output Ports, the
Power System automatically determines if the device is a Harmony Access Point
capable of receiving power over an Ethernet cable.
If the device is a Harmony Access Point, then the Power System will supply DC power
over the Ethernet cable.
If the device is not a Harmony Access Point, then the Power System will recognize that
the device does not support remote power feeding, and the Power System will not
supply DC power. However, this does not prevent Ethernet data from being
exchanged, so the device will still have a connection to the network through the Power
System (assuming that the device has an external power supply).
WARNING! Proxim recommends that you only connect Harmony Access Points or
Harmony AP Power Over LAN Modules to the Harmony Power System’s
Output Ports. Proxim is not responsible for any damage caused by con-
necting an incompatible device to an Output Port.
Using the Power System and AC Power Simultaneously
A Harmony 802.11a or 802.11b Access Point may be connected to two power sources
simultaneously. If for any reason the primary power source fails, then the Access
Point will automatically switch over to the second or backup power source and
continue to operate normally.
If a Harmony 802.11a/802.11b Access Point is already connected to a power source via
its AC power adapter when attached to the Power System, then the Access Point will
use the power source from the AC adapter. In this case, if power is removed from the
AC adapter, the Access Point will reboot automatically and then obtain power from the
Power System. If the Harmony 802.11a/802.11b Access Point is already attached to
the Power System when the AC adapter is plugged in, then the Access Point will use
the power source from the Power System. If the Power System loses power, the
Access Point will begin taking power from the AC adapter without interruption (i.e., no
reboot is necessary).
Note: The Harmony OpenAir Access Point cannot be connected to two power
sources simultaneously.
If at any time the Ethernet cable is disconnected from an Access Point, the Power
System will stop providing power to the port without disrupting Ethernet
communications on the network. The Harmony Power System regularly monitors the
channel status so it learns when an Access Point has been disconnected or
reconnected.