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<div class="div">
<h2>Nokia UltraSite EDGE Base Station</h2>

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<h3>Continuous
monitoring </h3>

<p>In the Nokia UltraSite EDGE BTS, part of the monitoring
is made by HW; like monitoring of synthesiser. Most of the monitoring procedures
are so effective that additional testing to find faulty unit is not needed.
The following items are monitored continuously:</p>


<ul>
<li><p>Internal busses of the base station</p>
</li>
<li><p>Transmission equipment interfaces</p>
</li>
<li><p>RF parts</p>
</li>
<li><p>Mast Head Amplifiers</p>
</li>
<li><p>LNAs</p>
</li>
<li><p>Nokia UltraSite Support and Nokia UltraSite
EDGE BTS Integrated Battery Backup (IBBU)</p>
</li>
<li><p>Dual Baseband Unit (BB2x) and the digital
parts of the Base Operations and Interface Unit (BOI)</p>
</li>
<li><p>Combining Units (RTxx, DVxx and LNAs)</p>
</li>
<li><p>Temperature (heating and cooling) system
of the base station</p>
</li>
<li><p>Power supplies: input and output voltages</p>
</li>
<li><p>Reference Oven Oscillator.</p>
</li>
</ul>


<p>If any supervision tests mentioned above fail, the alarm
handling is capable to run further tests in means of diagnosis.</p>
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<h3>Mains
breakdown</h3>

<p>A typical short voltage drop does not cause any detectable
harm to the operation and does not cause an alarm. In case of a mains breakdown,
the Nokia UltraSite EDGE Base Station cannot send an alarm to the BSC without
battery backup (either integrated or external).</p>
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