3Com OfficeConnect WX1200, Reference Manual

Page: 448 / 520

448 C
HAPTER
16: M
ONITORING THE
N
ETWORK
Displaying RF
Environment
Statistics
To display RF environment statistics, in the RF Monitor window, select the
RF Environment tab at the bottom of the window.
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.