User's Manual

Tsunami MP.11 2454-R, 5054-R, and 5054-R-LR Installation and Management
Chapter 1. Overview 9
POWER-OVER-ETHERNET
The unit is equipped with an Active Ethernet module. Using Power-over-Ethernet (PoE), you can provide
electricity and wired connectivity to the unit over a single Category 5 cable. Although the power injector that is
supplied with the unit is 802.3af-compatible, standard 802.3af-compliant power modules will not properly power
the units. Always use the supplied power injector.
• The Active Ethernet integrated module provides –48 VDC over a standard Cat5 Ethernet cable.
• Maximum power supplied to the unit is 20 Watts (when the unit is heating or cooling); the units typically
draw less than 7.5 Watts.
• The unit only accepts power on the “extra pairs”, not on the data pairs according the configuration for
“midspan” power injection, see the IEEE 802.3af standard.
• Heating or cooling discussion: Between 0 and 55° Celsius internal temperature, the unit does not need to
regulate its temperature, so the power draw is generally lower in this temperature range. When the
internal temperature gets close to the limits, the unit starts to heat/cool itself and the power draw
increases. Powering while cold triggers a special self-heat mode where the unit is inoperable until the
temperature is above 0° deg Celsius. This is signaled by a solid red LED on the Ethernet connector.
Once the internal temperature is above 0 degrees Celsius, the unit boots normally.
FINDING A SUITABLE LOCATION
To make optimal use of the unit, you must find a suitable location for the hardware. The range of the unit largely
depends upon the position of the antenna. Proxim recommends you do a site survey, observing the following
requirements, before mounting the hardware.
• The location must allow easy disconnection of the unit from the power outlet if necessary.
• The unit must not be covered and the air must be able to flow freely around the unit.
• The unit must be kept away from vibration and excessive heat, and must be kept free from dust buildup.
• The installation must conform to local regulations at all times.
Notes:
• The Configure System window provides a selectable Country field that automatically provides the
allowed bandwidth and frequencies for the selected country as well as, where applicable, Dynamic
Frequency Selection (DFS) and Transmit Power Control (TPC).
• Non-US installers should not add an antenna system until the Country is selected, the unit is rebooted,
and the proper power level is configured. The output power level of the final channel selected by DFS
scan can be found in the Event Log (see “View the Event Log Contents”
on page 41).