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<h3>User interface</h3>

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<h4>BSC
MMI</h4>

<p>The following are the MML commands related to Soft Channel
Capacity:</p>


<ul>
<li><p><em>Transceiver Handling</em>,
command group ER: <span class="command-sem">ERM</span> for modifying
the Full Rate only radio time slots to Dual Rate supporting.</p>
</li>
<li><p><em>Base Station Controller
Parameter Handling</em>, command group EE: <span class="command-sem">EEI</span>
for checking the number of real TCHs uder BCSUs.</p>
</li>
<li><p><em>Licence and Feature
Handling</em>, command group W7: <span class="command-sem">W7I</span>
for checking the status of the licence and <span class="command-sem">W7M</span>
for modifying the status of the licence.</p>
</li>
</ul>
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<h4>Parameters</h4>

<p><em>FIFILE parameters</em></p>


<p>Soft Channel Capacity is controlled with FIFILE parameter <span class="parameter-sem">SOFT_CH_CAPA_IN_USE</span>. You cannot change
the value of the parameter.</p>
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<h4>Error
codes</h4>

<ul>
<li><p><span class="error-sem">SOFT CHANNEL CAPACITY LICENCE EXCEEDED</span>:
The maximum amount of soft channels in the BSC is exceeded.</p>
</li>
<li><p><span class="error-sem">TOO MANY SCC CHANNEL PER AMR HR CHANNEL IN
BSCU</span>: There are more soft channels than AMR HR channels in the BSCU.</p>
</li>
<li><p><span class="error-sem">SOFT CHANNEL CAPACITY FEATURE IS NOT IN USE
IN BSC</span>: Soft Channel Capacity is not in use in the BSC.</p>
</li>
</ul>
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<h4>Alarms</h4>

<p>BTS alarm <span class="alarm-sem">7746</span> 'CH
CONGESTION IN CELL ABOVE DEFINED THRESHOLD' is modified to indicate the operator
the TCH congestion due to BCSU traffic handling capacity.</p>
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<h4>Counters</h4>

<p>When Soft Channel Capacity is active and there are extra TCHs created
in a cell, it is possible that radio channel allocation attempt is rejected
because of the lack of BSCU capacity even if there are free radio traffic
channels in the cell. In this case the existing traffic measurement and resource
availability counters are augmented as if the radio channel allocation attempt
was rejected because of lack of radio resources. The following counters are
an exception:</p>


<ul>
<li><p>TOTAL CHANNEL BUSY TIME (2026)</p>
</li>
<li><p>FULL RATE radio CONGESTION TIME (2044)</p>
</li>
<li><p>HALF RATE radio CONGESTION TIME (2045)</p>
</li>
</ul>


<p>These counters do not show congestion time unless all the radio traffic
channels of the cell have been occupied.</p>
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