Nlynx Wireless Gateway - Manual (Page 63)

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Information — Wireless Tallies
The Wireless Tallies panel gives statistics on the operation of the Wireless Gateway's
wireless access point. These statistics help you check wireless activity levels and
monitor the health of the wireless segment.
Figures are given for several kinds of transmitted (Tx) and received (Rx) frames.
(“Frame,” in this context, can be interpreted to mean “packet”).
Unicast frames are packets addressed to a single machine.
Multicast frames are packets addressed to more than one machine. Packets addressed
to all machines on the network, often called broadcast packets, are included in these
tallies.
Tx Errors is the number of packets transmitted erroneously.
Rx FCS Errors is the number of packets received from wireless stations and found to
have Frame Check Sequence errors. The FCS is a value computed by the sender on
the basis of packet contents and then sent at the end of the packet. The Wireless
Gateway does the same calculation and compares the result with the value received. A
packet with an FCS error is silently dropped; the sender, receiving no
acknowledgement, automatically tries again. An abnormally large number of FCS
errors usually indicates radio-frequency interference or a faulty transmitter.