Draytek Vigor2110 Series User Manual page 250

Txop
ACM
AckPolicy
CWMin or equals to CWMin value. Both values will influence
the time delay for WMM accessing categories. The difference
between AC_VI and AC_VO categories must be smaller;
however, the difference between AC_BE and AC_BK
categories must be greater.
It means transmission opportunity. For WMM categories of
AC_VI and AC_VO that need higher priorities in data
transmission, please set greater value for them to get highest
transmission opportunity. Specify the value ranging from 0 to
65535.
It is an abbreviation of Admission control Mandatory. It can
restrict stations from using specific category class if it is
checked.
Note: Vigor2110 provides standard WMM configuration in the
web page. If you want to modify the parameters, please refer to
the Wi-Fi WMM standard specification.
"Uncheck" (default value) the box means the AP router will
answer the response request while transmitting WMM packets
through wireless connection. It can assure that the peer must
receive the WMM packets.
"Check" the box means the AP router will not answer any
response request for the transmitting packets. It will have better
performance with lower reliability.
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Vigor2110 Series User's Guide