Compex Systems 802.11N - Manual (Page 64)

Rx Invalid Crypt value represents the number of transmitted and received packets which were
encrypted with the wrong encryption key and failed the decryption routines. It can be used to
detect invalid wireless security settings and encryption break attempts.
Rx Invalid Frag value represents the number of packets missed during transmission and reception.
These packets were dropped due to re-assembling failure as some link layer fragments of the
packet were lost.
Tx Excessive Retries value represents the number of packets which failed to be delivered to the
destination. Undelivered packet are retransmitted a number of times before an error occurs.
Missed beacons value represents the number beacons (management packets sent at regular
intervals by the Access Point) which were missed by the client. This can indicate that the
wireless client is out of range.
Other errors value represents the total number of transmitted and received packets that were lost
or discarded for other reasons.