3Com 3CRWEASYA73, WL-575 manual Align Antennas

LED	Color	Indicates
11g	Amber	The 802.11g 2.4 GHz radio is enabled.
(Three	and	RSSI Mode:
LEDs)	Flashing	 One fully lit LED indicates a low RSSI
		output level, two LEDs.a medium
		level, and three LEDs the maximum
		level.
		 A flashing LED indicates an
		intermediate RSSI output level
		AP Mode:
		 One fully lit LED indicates a low
		traffic rate, two LEDs.a medium rate,
		and three LEDs the maximum rate.
		 A flashing LED indicates an
		intermediate traffic rate level
	Off	No link is present or the 802.11g radio
		is disabled.

ALIGN ANTENNAS

After wireless bridge units have been mounted, connected, and their radios are operating, bridge link antennas must be accurately aligned to ensure optimum performance. This alignment process is particularly important for long-range point-to-point links. In a point-to-multipoint configuration the root bridge uses an omnidirectional or sector antenna, which does not require alignment, but bridge nodes still need to be correctly aligned with the root bridge antenna.

„Point-to-Point Configurations – In a point-to-point configuration, the alignment process requires two people, one at each end of the link. The use of cell phones or two-way radio communication may help with coordination. To start, you can just point the antennas at each other, using binoculars or a compass to set the general direction. For accurate alignment, you must monitor the signal strength LEDs as the antenna moves horizontally and vertically.

„Point-to-Multipoint Configurations – In a point-to-multipoint configuration all bridge nodes must be aligned with the root bridge antenna. The alignment process is the same as in point-to-point links, but only the bridge node end of the link requires the alignment.

The signal strength LEDs indicate the received radio signal strength for a particular bridge link. The more LEDs that turn on, the stronger the signal. Alternatively, you can monitor the Receive Signal Strength Indicator (RSSI) value directly from the management interface. The higher the RSSI value, the stronger the signal.

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