TORONTO – In an effort to shore up its carrier business, Nortel will discontinue its mobile WiMAX business and end its joint agreement with Alvarion Ltd. "We are taking rapid action to narrow our strategic focus to areas where we can drive maximum return on investment," said Richard Lowe, president of carrier networks for Nortel. "We will work closely with Alvarion to transition our mobile WiMAX customers to them and assure customers that they will continue to benefit from leading-edge technology and high-quality service. Our continued success in the wireless business requires us to focus our energy on opportunities with long-standing...