The following table describes how setting these values changes the ToS precedence bits.
Original ToS value
37
00100101
AndMask setting, which protects all the precedence bits but the 5th and 6th bits
243
11110011
Intermediate result
33
00100001
OrRule applied to the ToS precedence bits, which change the 4th and 5th precedence bits
24
00011000
New TOS value
57
00111001