3Com WX4400 3CRWX440095A WX1200, 3CRWXR10095A manual Statistics, RF Monitor Environment Columns

446CHAPTER 16: MONITORING THE NETWORK

Displaying RF To display RF environment statistics, in the RF Monitor window, select the Environment RF Environment tab at the bottom of the window.

Statistics

Table 56 lists the information displayed on the tab.

Table 56 RF Monitor Environment Columns

Column	Description
Channel	Radio channel to which the other columns apply.
Noise	Noise threshold on the active channel. RF Auto-Tuning
	prefers channels with low noise levels over channels with
	higher noise levels.
CRC Errors	Number of frames received by the radio on that active
	channel that had CRC errors. A high CRC error count can
	indicate a hidden node or co-channel interference.
PHY Errors	Number of packets that could not be decoded by the
	MAP. This condition can have any of the following causes:
	„ Collision of an 802.11 packet.
	„ Packet whose source is too far away, thus rendering
	the packet unintelligible by the time it reaches the
	MAP.
	„ Interference caused by an 802.11b/g phone or other
	source.
	It is normal for this counter to be about 10 percent of the
	total RxByte count. It is also normal for higher data rates to
	have higher Phy error counts than lower data rates.