3Com 3CRWER300-73, User Manual

Page: 69 / 172

Wireless Settings 67
CWMin (Minimum Contention Window) – The initial upper limit of the
random backoff wait time before wireless medium access can be
attempted. The initial wait time is a random value between zero and the
CWMin value. Specify the CWMin value in the range 0-15 microseconds.
Note that the CWMin value must be equal or less than the CWMax value.
TXOP Limit (Transmit Opportunity Limit) – The maximum time an AC
transmit queue has access to the wireless medium. When an AC queue is
granted a transmit opportunity, it can transmit data for a time up to the
TxOpLimit. This data bursting greatly improves the efficiency for high
data-rate traffic. Specify a value in the range 0-65535 microseconds.
ACM – Admission Control Mode, for the access category. When enabled,
clients are blocked from using the access category. (Default: Disabled)
Ack Policy (WMM Acknowledge Policy) – By default, all wireless data
transmissions require the sender to wait for an acknowledgement from
the receiver. WMM allows the acknowledgement wait time to be turned
off for each Access Category (AC). Although this increases data
throughput, it can also result in a high number of errors when traffic
levels are heavy. (Default: Acknowledge)