"Nortel continue to pound away at the advantages of MIMO and the limitations of adaptive antenna solutions, whereas many operators, and nearly all other vendors, recognize the value of both approaches. Nortel thinks it differentiates them. It does, but probably not always in the way it would like to think," says Donegan.

    Nortel, though, continues to bang its WiMax drum, and has teamed up with a group of companies to promote the use of the wireless technology in the U.K., once new spectrum become available in early-to-mid 2008. (See Nortel, Urban WiMax Team Up.)