Nortel Networks Corp. has made several changes in its Asian operations. Masood Tariq leaves his position as president Asia to return to North America as president of global alliances. Robert Mao, currently advising Nortel president/CEO Frank Dunn, is now president/CEO Nortel China. Acting president Yuan-Hao Lin becomes COO of the Chinese company. John Giamatteo, who had been responsible for sales in Japan and Korea, will see his territory expand as he now conducts sales in Australia, New Zealand, India, Pakistan and the ASEAN nations.