MetroNet Communications Corp. (Calgary, AB, Canada) extended its agreement with Nortel Networks (Brampton, ON, Canada) to purchase at least $200 million worth of access, high-capacity and local transport optical equipment, and switching systems over the next three years. MetroNet has fiber-optic networks in major business centers across Canada and is deploying a national fiber-optic network connecting these centers and key border crossings into the United States.