Proxim AP-4000 - Manual (Page 20)

Installation and Initialization AP-4000 Series User Guide
AP-4000 Series Hardware Description
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Figure 2-2 AP-4000/4000M/4900M Antenna Connectors
Connectors 1 and 2 are for the 802.11b/g radio; connectors 3 and 4 are for the 802.11a radio. When the AP is mounted
on a wall, connectors 1 and 4 correspond to the horizontally polarized internal antenna, providing a coverage pattern
parallel to the wall; connectors 2 and 3 correspond to the vertically polarized internal antenna, providing a coverage
pattern parallel to the ceiling/floor. When the AP is mounted to a ceiling, connectors 1 and 4 correspond to the vertically
polarized internal antenna, and connectors 2 and 3 correspond to the horizontally polarized internal antenna. Plugging an
external antenna in to the antenna connector disables the corresponding internal antenna on the wireless interface.
The AP continues to support antenna diversity with external antennas connected. With one external antenna connected
to one of the two antenna connectors on a radio, one internal antenna and one external antenna are used for antenna
diversity. With two external antennas connected, both external antennas are used for antenna diversity, and both internal
antennas are disabled.
With external antennas connected, you may wish to manually select a particular antenna for use. To do so, disable
antenna diversity by manually selecting which antenna to use for each wireless interface through the Command Line
Interface. See
Configure Antenna Diversity for information.
For a list of recommended antennas, see http://www.proxim.com/products/wifi/accessories . For installation instructions,
see Installing External Antennas .
4.9 GHz Antenna
On the AP-4900M, antenna connector 3 is equipped with a pigtail adaptor for connection to a 4.9 GHz antenna. When the
AP-4900M is configured to operate in the 4.9 GHz Public Safety operational mode, antenna diversity is automatically
disabled, and antenna 3 is statically configured for use. Connecting an external antenna to this antenna port disables the
corresponding internal antenna. For a list of recommended antennas, see
http://www.proxim.com/products/wifi/accessories . For installation instructions, see Attaching Antenna(s) to the AP-4900M
for 4.9 GHz Operation .
Active Ethernet
The AP-4000/4000M/4900M is equipped with an 802.3af-compliant Active Ethernet module. Active Ethernet (AE)
delivers both data and power to the access point over a single Ethernet cable. If you choose to use Active Ethernet, there
is no difference in operation; the only difference is in the power source.