OTTAWA, Canada, April 23 -- Mitel Networks, a provider of next-generation IP telephony solutions focused on voice and data convergence for broadband, said that Don Smith has joined the company as its chief executive officer. Smith comes to Mitel from Nortel Networks where he served as president of Optical Internet Solutions. "We're thrilled to have Don head our management team," said Terry Matthews, Mitel Networks chairman. "Don's track record, strategic vision, and knowledge of communications and broadband solutions are invaluable to our success as we continue to establish a leadership position in this rapidly developing market for converged solutions targeted at real-world business needs."