Radvision Gets Deal for Partner's 3G Video Trial  TEL AVIV (Reuters) - Israel's Radvision &lt;A HREF="http://www.reuters.co.uk/financeQuoteLookup.jhtml?ticker=RVSN.O qtype=sym infotype=info qcat=news"&gt;RVSN.O&lt;/A&gt; &lt;A HREF="http://www.reuters.co.uk/financeQuoteLookup.jhtml?ticker=RVSN.TA qtype=sym infotype=info qcat=news"&gt;RVSN.TA&lt;/A&gt;  said on Monday its video services platform has been chosen by  mobile phone operator Partner Communications &lt;A HREF="http://www.reuters.co.uk/financeQuoteLookup.jhtml?ticker=PTNR.TA qtype=sym infotype=info qcat=news"&gt;PTNR.TA&lt;/A&gt; as a  core part of its third-generation video services trial.