Wireless Networks Business Helps Lucent  CHICAGO (Reuters) - Lucent Technologies Inc. &lt;A HREF="http://www.investor.reuters.com/FullQuote.aspx?ticker=LU.N target=/stocks/quickinfo/fullquote"&gt;LU.N&lt;/A&gt;, among  the world's largest makers of telecommunications equipment, on  Wednesday said quarterly earnings rose sharply, helped by  improvement in its wireless networks business and lower costs.