Short for
Multipoint Microwave Distribution System, also know as
Multi-channel Multi-point Distribution System and
wireless cable, is another wireless
broadband technology for Internet Access.
MMDS channels come in 6 MHz chunks and run on frequencies licensed exclusively by the Federal Communications Commission.
MMDS is a line-of-sight service (see Fresnel Zone definition), so it won't work well around mountains, but it will work in rural areas, where copper lines are not available.