For the second time in 27 years, Terry Matthews is taking Mitel public. This time around, the company is apparently looking to raise $150-million for "general corporate purposes". While Matthews is well-respected as Canada's leading telecom entrepreneur, it is important that potential Mitel investors realize the Ottawa-based company is posting large losses as it pours money into R&D,sales and marketing to compete with heavyweights such as Cisco, Avaya and Nortel in the IP communications market. For history buffs, Mitel originally went public in 1979 after it was started six years earlier by Matthews and Michael Cowpland, who later went on to start Corel Corp.