<Tr> <Td> 108 </Td> <Td> 5540 </Td> <Td> 5530--5550 </Td> <Td> 20 </Td> <Td> U-NII - 2C </Td> <Td> DFS </Td> <Td> DFS </Td> <Td> DFS / TPC </Td> <Td> DFS / TPC (otherwise limited to 500 mW instead of 1 W) </Td> <Td> Yes </Td> <Td> DFS / TPC </Td> <Td> Unknown </Td> <Td> DFS / TPC </Td> <Td> No </Td> <Td> No </Td> <Td> Yes </Td> <Td> DFS / TPC </Td> <Td> DFS / TPC (otherwise limited to 500 mW instead of 1 W) </Td> <Td> Yes </Td> <Td> DFS </Td> <Td> DFS </Td> <Td> DFS / TPC </Td> </Tr> <Tr> <Td> 110 </Td> <Td> 5550 </Td> <Td> 5530--5570 </Td> <Td> 40 </Td> <Td> U-NII - 2C </Td> <Td> DFS </Td> <Td> DFS </Td> <Td> No </Td> <Td> No </Td> <Td> Yes </Td> <Td> No </Td> <Td> Unknown </Td> <Td> DFS / TPC </Td> <Td> No </Td> <Td> No </Td> <Td> No </Td> <Td> DFS / TPC </Td> <Td> DFS / TPC (otherwise limited to 500 mW instead of 1 W) </Td> <Td> Yes </Td> <Td> DFS </Td> <Td> DFS </Td> <Td> DFS / TPC </Td> </Tr> <Tr> <Td> 112 </Td> <Td> 5560 </Td> <Td> 5550--5570 </Td> <Td> 20 </Td> <Td> U-NII - 2C </Td> <Td> DFS </Td> <Td> DFS </Td> <Td> DFS / TPC </Td> <Td> DFS / TPC (otherwise limited to 500 mW instead of 1 W) </Td> <Td> Yes </Td> <Td> DFS / TPC </Td> <Td> Unknown </Td> <Td> DFS / TPC </Td> <Td> No </Td> <Td> No </Td> <Td> Yes </Td> <Td> DFS / TPC </Td> <Td> DFS / TPC (otherwise limited to 500 mW instead of 1 W) </Td> <Td> Yes </Td> <Td> DFS </Td> <Td> DFS </Td> <Td> DFS / TPC </Td> </Tr> <Tr> <Td> 114 </Td> <Td> 5570 </Td> <Td> 5490--5650 </Td> <Td> 160 </Td> <Td> U-NII - 2C </Td> <Td> DFS </Td> <Td> No </Td> <Td> DFS </Td> <Td> No </Td> <Td> Yes </Td> <Td> No </Td> <Td> Unknown </Td> <Td> DFS / TPC </Td> <Td> No </Td> <Td> No </Td> <Td> No </Td> <Td> No </Td> <Td> No </Td> <Td> No </Td> <Td> No </Td> <Td> DFS </Td> <Td> DFS / TPC </Td> </Tr>

Which 2.4 ghz channels are safe to use on the north american continent