HP IP Distance Gateway - Manual (Page 27)

Table 3 TCP window size scale factors
Scale factor MWS scale result
0 0 to 2
1 2 to 4
2 4 to 8
3 8 to 16
4 16 to 32
5 32 to 64
6 64 to 128
7 128 or greater
IP performance tuning 27