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<h2>BTS Supervision for Nokia InSite Base Station</h2>

<p>The Nokia InSite Base Station is capable of monitoring
and testing itself in an operational state without a separate command as described
below.</p>


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<h3>Continuous
monitoring </h3>

<p>Part of the monitoring, such as the monitoring of a RF-synthesiser,
is done by hardware. The following items are monitored continuously:</p>


<ul>
<li><p>Internal I2C bus</p>
</li>
<li><p>RF parts: synthesiser, Tx and Rx parts'
current consumption</p>
</li>
<li><p>Digital parts: DSP, ASICs, interfaces</p>
</li>
<li><p>Heating for oscillator</p>
</li>
<li><p>Power supply voltages</p>
</li>
<li><p>Reference Oven Oscillator.</p>
</li>
</ul>


<p>If the InSite Base Station experiences an AC supply failure,
the Battery Backup Unit becomes the power source. The DC level will be measured,
and when the supply voltage level drops below a certain limit, the low supply
voltage feed will generate an alarm.</p>
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