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Table 1 Default DCF and EDCA parameter set.

From: Assessment of the IEEE 802.11e EDCA Protocol Limitations when Dealing with Real-Time Communication

Parameters   CWmin CWmax DIFS/AIFSN
DCF   aCWmin aCWmax 2
EDCA AC_BK aCWmin aCWmax 7
  AC_BE aCWmin aCWmax 3
  AC_VI aCWmin 2
  AC_VO 2