The ISM Band is an unlicensed publicly owned part of the radio spectrum in the 900MHz, 2.4GHz and 5GHz ranges. ISM stands for Instrumentation, Scientific, and Medical.
I've also heard it refered to as Industrial, Scientific and Medical. minor difference, eh? -- EliabHelon
A note from JimThompson on the OpenAp list regarding exactly which bands 802.11 run in.
- 802.11a is:
- U-NII (47 CFR 15.401):
- 5.150-5.250 GHz up to 50mW
- 5.250-5.350 GHz up to 250mW
- 5.725-5.825 GHz up to 1000mW
- ISM (47 CFR 15.247):
- 5.725-5.850 GHz up to 1000mW
- U-NII (47 CFR 15.401):
- 802.11b is
- ISM (47 CFR 15.247):
- 2.400-2.4835GHz up to 1000mW
- ISM (47 CFR 15.247):