Nokia ( NOK) plans to lay off 1,700 workers globally at several units as global demand for cellphones wanes and it looks to cut costs. The company said the cuts are being made in its devices and markets units as well as at some support functions. Nokia said it "plans to scale sales, marketing and technology management to match the pruned portfolio and global consumer demand" and will streamline research and development in its devices unit. Nokia said it plans to begin talks with employees soon. A timeframe and closer details would be announced later. The announcement Tuesday from the world's largest cellphone maker follows earlier plans by Nokia to make savings with voluntary resignations from up to 1,000 workers in a global program open to employees until May 31.