Nextlink Wireless Inc., a holder of spectrum covering 75 major markets in the US and a subsidiary of XO Holdings Inc., has inked a master purchase agreement with DragonWave Inc. Nextlink will use DragonWave's Horizon and AirPair products to offer wireless service providers backhaul and cost-effective support of next generation mobile applications, content and data. The DragonWave solutions are an alternative to conventional wireline networks.