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<div class="div">
<h3>BTS</h3>

<p>Nokia Talk-family BTS site can be upgraded to Nokia EDGE
functionality with the installation of a Nokia UltraSite EDGE BTS (housing
Nokia EDGE-capable TRXs) on the site as an extension cabinet. Site compatibility
is achieved with the synchronisation of Nokia Talk-family BTS and Nokia UltraSite
EDGE BTS and by using existing antenna and feeding structures. The synchronised
BTSs share a single <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=id04445#id04445" 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=id04445#id04445');return false" shape="rect" target="_blank">BCCH</a> (per sector) and function in the
network as a single cell. The site is then seen as one object by the NetAct
and the BSC (Multi BCF control feature). In this configuration, the Nokia
Talk-family TRXs support voice, circuit-switched data, HSCSD and GPRS.</p>


<p>EDGE TRXs are required. </p>


<p>It is possible to have non-EDGE and EDGE TRXs under the same BTS_Object
if RF Hopping or No Hopping is used. ‘BTS_Object’ is an object in the BSC
that corresponds to a set of TRXs in a single BTS cabinet, which cover the
same geographical area, use the same frequency band, and (normally) have the
same output power. A BTS_Object may contain 1 to 12 TRXs and one segment may
contain 1 or more BTS_Objects.</p>


<p>For non-EDGE and EDGE TRXs within a BB Hopping BTS_Object,
see Tables 4 and 5.</p>


<p>Nokia EDGE-capable TRXs for the Nokia MetroSite EDGE BTS
and the UltraSite EDGE BTS are compatible with GSM TRXs. In addition to providing
Nokia EDGE services, Nokia EDGE TRXs are fully GSM compatible and support
GSM voice, data, <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=id08864#id08864" 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=id08864#id08864');return false" shape="rect" target="_blank">HSCSD</a>, GPRS and EGPRS. They are also
backward compatible with all legacy GSM mobiles.</p>


<a name="dec931651578" shape="rect"></a>
<div class="topic">
<h4>BTS
hopping modes</h4>

<p>The different TRX hopping modes are:</p>


<ul>
<li><p>No hopping</p>


<ul>
<li><p>TRX RF units Tx/Rx on fixed frequency</p>
</li>
<li><p>Radio channel to MS is fixed frequency</p>
</li>
</ul>
</li>
<li><p>BB hopping</p>


<ul>
<li><p>TRX RF units Tx/Rx on fixed frequency</p>
</li>
<li><p>Radio channel to MS Tx/Rx is via different
TRX RF units</p>
</li>
</ul>
</li>
<li><p>RF hopping</p>


<ul>
<li><p>TRX RF unit Tx/Rx is on different frequencies</p>
</li>
<li><p>Radio channel to MS is from the same
(hopping) RF unit</p>
</li>
</ul>
</li>
<li><p>Antenna hopping</p>


<ul>
<li><p>TRX RF unit Tx/Rx is on different frequencies</p>
</li>
<li><p>Radio channel to MS Tx/Rx is via different
TRX RF units</p>
</li>
<li><p>[To give Antenna Diversity on the link
from BTS to MS]</p>
</li>
<li><p>Note - Antenna hopping requires an
EDGE TRX</p>
</li>
</ul>
</li>
</ul>
</div>


<a name="dec9317469" shape="rect"></a>
<div class="topic">
<h4>UltraSite
TRX units</h4>

<ul>
<li><p>UltraSite GMSK RF units are: 'TSxA'</p>
</li>
<li><p>UltraSite EDGE RF units are: 'TSxB'</p>
</li>
</ul>


<p>Where x is the letter (T, G, D, P) which identifies the
frequency band (800, 900, 1800, 1900 MHz).</p>


<ul>
<li><p>UltraSite GMSK BB unit is: BB2A</p>
</li>
<li><p>UltraSite EDGE BB units are: BB2E,
BB2F</p>
</li>
</ul>


<p>The TSxB EDGE RF unit always requires an EDGE-capable baseband
unit, BB2E or BB2F, even if it works in GSM mode only.</p>


<p>The EDGE-capable baseband unit, BB2E or BB2F, is backward
compatible and supports also the GSM RF unit, TSxA. The following table shows
compatibility matrix for all the different BB2x and TSxx combinations.</p>


<p>EGPRS support requires both EDGE-capable baseband unit,
BB2E or BB2F and EDGE-capable RF unit, TSxB.</p>


<a name="dec931713910" shape="rect"></a>
<div>
<table border="1">
<thead>
<tr align="left" char="" charoff="50" valign="bottom">
<th colspan="1" rowspan="1" valign="top"><p>Units</p>
</th>
<th colspan="1" rowspan="1" valign="top"><p>Compatible</p>
</th>
<th colspan="1" rowspan="1" valign="top"><p>Modes of operation</p>
</th>
</tr>
</thead>
<tbody>
<tr align="left" char="" charoff="50" valign="top">
<td colspan="1" rowspan="1"><p>BB2A + TSxA</p>
</td>
<td colspan="1" rowspan="1"><p>OK</p>
</td>
<td colspan="1" rowspan="1"><p>GMSK</p>
</td>
</tr>
<tr align="left" char="" charoff="50" valign="top">
<td colspan="1" rowspan="1"><p>BB2A + TSxB</p>
</td>
<td colspan="1" rowspan="1"><p>NOK</p>
</td>
<td colspan="1" rowspan="1"><p>-</p>
</td>
</tr>
<tr align="left" char="" charoff="50" valign="top">
<td colspan="1" rowspan="1"><p>BB2E + TSxA</p>
</td>
<td colspan="1" rowspan="1"><p>OK</p>
</td>
<td colspan="1" rowspan="1"><p>GMSK</p>
</td>
</tr>
<tr align="left" char="" charoff="50" valign="top">
<td colspan="1" rowspan="1"><p>BB2E + TSxB</p>
</td>
<td colspan="1" rowspan="1"><p>OK</p>
</td>
<td colspan="1" rowspan="1"><p>GMSK, EDGE</p>
</td>
</tr>
<tr align="left" char="" charoff="50" valign="top">
<td colspan="1" rowspan="1"><p>BB2F + TSxA</p>
</td>
<td colspan="1" rowspan="1"><p>OK</p>
</td>
<td colspan="1" rowspan="1"><p>GMSK</p>
</td>
</tr>
<tr align="left" char="" charoff="50" valign="top">
<td colspan="1" rowspan="1"><p>BB2F + TSxB</p>
</td>
<td colspan="1" rowspan="1"><p>OK</p>
</td>
<td colspan="1" rowspan="1"><p>GMSK, EDGE</p>
</td>
</tr>
</tbody>
</table>
</div>
</div>


<a name="dec931717911" shape="rect"></a>
<div class="topic">
<h4>GMSK
and EDGE TRX hopping group compatibility</h4>

<p>Because of the different data rates with GMSK and EDGE,
there are restrictions on mixing GMSK-only TRXs and EDGE-capable TRXs within
a baseband hopping group. Note that it is possible to set up GMSK-only TRXs
in one BTS_Object,  and EDGE-capable TRXs in a second BTS_Object, within the
same segment by using the Common BCCH feature.</p>


<p>With RF hopping any combination of TRXs within a hopping
group is possible.</p>


<p>Allowed TRX combinations for baseband hopping are listed
in the following tables:</p>


<a name="jan741729112" shape="rect"></a>
<div>
<p>Table: Compatible TRXs, 'GMSK TRX' hopping</p>


<table border="1">
<thead>
<tr align="left" char="" charoff="50" valign="bottom">
<th colspan="1" rowspan="1" valign="top"><p>Units</p>
</th>
<th colspan="1" rowspan="1" valign="top"><p>'GMSK TRX' hopping compatible</p>
</th>
<th colspan="1" rowspan="1" valign="top"><p>TRX mode of operation</p>
</th>
</tr>
</thead>
<tbody>
<tr align="left" char="" charoff="50" valign="top">
<td colspan="1" rowspan="1"><p>BB2A + TSxA</p>
</td>
<td colspan="1" rowspan="1"><p>OK</p>
</td>
<td colspan="1" rowspan="1"><p>GMSK</p>
</td>
</tr>
<tr align="left" char="" charoff="50" valign="top">
<td colspan="1" rowspan="1"><p>BB2E + TSxA</p>
</td>
<td colspan="1" rowspan="1"><p>OK</p>
</td>
<td colspan="1" rowspan="1"><p>GMSK</p>
</td>
</tr>
<tr align="left" char="" charoff="50" valign="top">
<td colspan="1" rowspan="1"><p>BB2F + TSxA</p>
</td>
<td colspan="1" rowspan="1"><p>OK</p>
</td>
<td colspan="1" rowspan="1"><p>GMSK</p>
</td>
</tr>
<tr align="left" char="" charoff="50" valign="top">
<td colspan="1" rowspan="1"><p>BB2F + TSxB</p>
</td>
<td colspan="1" rowspan="1"><p>OK</p>
</td>
<td colspan="1" rowspan="1"><p>GMSK</p>
</td>
</tr>
</tbody>
</table>
</div>


<p>Note that BB2E + TSxB is not ‘GMSK TRX’ hopping compatible.</p>


<a name="jan741729203" shape="rect"></a>
<div>
<p>Table: Compatible TRXs, 'EDGE TRX' hopping</p>


<table border="1">
<thead>
<tr align="left" char="" charoff="50" valign="bottom">
<th colspan="1" rowspan="1" valign="top"><p>Units</p>
</th>
<th colspan="1" rowspan="1" valign="top"><p>'EDGE TRX' hopping compatible</p>
</th>
<th colspan="1" rowspan="1" valign="top"><p>Modes of operation</p>
</th>
</tr>
</thead>
<tbody>
<tr align="left" char="" charoff="50" valign="top">
<td colspan="1" rowspan="1"><p>BB2E + TSxB</p>
</td>
<td colspan="1" rowspan="1"><p>OK</p>
</td>
<td colspan="1" rowspan="1"><p>EDGE or GMSK</p>
</td>
</tr>
<tr align="left" char="" charoff="50" valign="top">
<td colspan="1" rowspan="1"><p>BB2F + TSxB</p>
</td>
<td colspan="1" rowspan="1"><p>OK</p>
</td>
<td colspan="1" rowspan="1"><p>EDGE or GMSK</p>
</td>
</tr>
</tbody>
</table>
</div>
</div>


<a name="dec931736115" shape="rect"></a>
<div class="topic">
<h4>MetroSite
TRX units</h4>

<ul>
<li><p>MetroSite EDGE TRX units are: 'WTxA'
or 'CTxA'</p>
</li>
<li><p>MetroSite GMSK-only TRX units are:
'VTxA' or 'HVxA'</p>
</li>
</ul>


<p>Where x is the letter (T, G, D, P) which identifies the
frequency band (800, 900, 1800, 1900 MHz).</p>


<p>MetroSite TRXs use RF hopping, so EDGE and GMSK-Only TRXs
may be used in the same hopping group.</p>


<p>MetroSite TRXs do not support IDD with BSS11/CXM4.0 software. </p>
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