i do not KNOW for sure, but is it possible that the number of users or devices allowed would be set by changing the range of local addresses assigned ? for example, by only allowing addresses numbered from 192.168.1.1 through 192.168.1.10, you would effectively be limiting total devices to 10, including the actiontec itself... maybe? i remember verizon's westell dsl modem had a setting like this for same reason.....good luck! anyone else with more specialized knowledge care to chime in??