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<h2>Supported configurations</h2>

<p>The BTS can be configured to two different modes: IDD with
4UD and IDD without 4UD.  4UD without IDD cannot be used. The BTS can simultaneously
have normal TRXs/sectors, and TRXs/sectors which function in IDD mode, but
with <a href="NED?action=retrieve&amp;identifier=general_glossary&amp;edition=13&amp;language=en&amp;coverage=global&amp;encoding=xhtml_1_0&amp;component=data&amp;item=data&amp;pointer=id010015#id010015" onclick="openSmallPopup(event,'NED?action=retrieve&amp;identifier=general_glossary&amp;edition=13&amp;language=en&amp;coverage=global&amp;encoding=xhtml_1_0&amp;component=data&amp;item=data&amp;pointer=id010015#id010015');return false" shape="rect" target="_blank">RTCs</a> it is possible to have only one sector, and
BB hopping cannot be used.</p>


<p>It has to be possible to freely define the relationship
between IDD main and auxiliary TRX so that the existing antenna cabling can
be utilized.</p>


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<p>There can be up to 6 pairs of IDD main and auxiliary TRXs.
4UD is not used.</p>


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<p>The maximum configuration can be 2 IDD TRX+2 IDD TRX+2
IDD TRX. 4UD is used.</p>


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<img alt="urn:mars:dn03318127:1:en:global:cgm_fixed:data:data" border="0" src="NED?action=retrieve&amp;identifier=dn03318127&amp;edition=1&amp;language=en&amp;coverage=global&amp;encoding=gif&amp;component=data&amp;item=data" /><p class="figure-caption">Figure: UltraSite IDD configuration - IDD only. This can only be used non-hopping.</p>
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<p>The maximum configuration can be 6 IDD TRX. 4UD is not
used.</p>
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