. . . . . . "Mitel Telecommunications" . . "Mitel Networks" . . . . . "Mitel#Corporate_history" . "SX2000" . . . . . . "MITEL" . . "1973" . . . . . . "4200" . "SX2000 equipment" . . . . . "Mitel" . "Mitel Semiconductor" . . "Mitel" . . "1.3E9" . . . . . . . . . . . "Mitel Networks Corporation" . . . . . . . . . . . . . "Mitel Corporation" .