Report: BT Poised to Buy Infonet  LONDON (Reuters) - Britain's BT Group Plc &lt;A HREF="http://www.investor.reuters.com/FullQuote.aspx?ticker=BT.L target=/stocks/quickinfo/fullquote"&gt;BT.L&lt;/A&gt; is hoping  to make a dramatic return to the United States with a \$1  billion acquisition of Californian telecoms group Infonet  Services Corp. &lt;A HREF="http://www.investor.reuters.com/FullQuote.aspx?ticker=IN.N target=/stocks/quickinfo/fullquote"&gt;IN.N&lt;/A&gt;, the Sunday Times newspaper reported.