3Com 3CRWDR200A-75 - Manual (Page 60)

60 C HAPTER 5: R OUTER C ONFIGURATION
Figure 37 Connection Control Screen
To specify that only certain wireless computers can connect to the Router,
select allow/deny, and then enter the MAC addresses of the wireless
clients. You may enter a maximum of 64 PCs in the list.
Click Save to save your existing configurations or Cancel to discard all
changes.