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About the Harmony Power System 8
Remote Power Feeding of Harmony Access Points
The Harmony Power System supplies DC power to Harmony Access Points (APs) over
standard Category 5 twisted pair Ethernet cables eliminating the need for AC outlets,
UPS equipment, and AC/DC adapters for the APs. The Power System employs the
unused pins of a twisted pair Ethernet cable (i.e., pins 4/5 and 7/8) to supply power to
an Access Point.
The Harmony Power System is installed between a network hub or switch and the
Harmony APs. The unit builds off of the existing network infrastructure.
The sole function of the Harmony Power System is to provide power to Harmony APs
over the same Ethernet cabling that already provides the Access Point with network
connectivity; the Power System has no impact on the network data exchanged
between the APs and the hub/switch.
The Harmony Power System is designed for use with a 10/100Base-TX Ethernet
network over a TIA/EIA-568 Category 5 cabling plant.
The Harmony 802.11a and 802.11b APs connect directly to the Harmony Power System
using a Category 5 Ethernet cable. The Harmony OpenAir AP requires that a Harmony
AP Power Over LAN Module be installed between the AP and the Power System. See
“AP Power Over LAN Module” on page 9 for more information.
Number of Access Points Supported by the Power System
The Harmony Power System ships with six (6) pairs of network ports; each pair has
one input port and one output port. However, due to the power requirements of the
Harmony 802.11a Access Point, the Power System can support no more than five (5)
Access Points if you connect one or more Harmony 802.11a Access Points to it.
Important! Do not connect more than five (5) Access Points to this Power System if
you are using one or more 802.11a Access Points (even though the Power
System has six (6) pairs of network ports).
Refer to the chart below to determine how many Access Points you can connect to the
Harmony Power System.
# of 802.11a APs # of 802.11b or OpenAir APs Maximum # of APs
505
415
325
235
145
066