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Positioning</title>
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<h1>External interfaces of Support for US Emergency Call (E911)
Positioning</h1>

<p><a href="NED?action=retrieve&amp;identifier=dn03527982&amp;edition=2&amp;language=en&amp;coverage=global&amp;encoding=xhtml_1_0&amp;component=data&amp;item=data&amp;pointer=ned_2#ned_2" onclick="sync(this);return true" shape="rect">A interface</a></p>


<p><a href="NED?action=retrieve&amp;identifier=dn03527982&amp;edition=2&amp;language=en&amp;coverage=global&amp;encoding=xhtml_1_0&amp;component=data&amp;item=data&amp;pointer=ned_3#ned_3" onclick="sync(this);return true" shape="rect">Lb interface</a></p>


<p><a href="NED?action=retrieve&amp;identifier=dn03527982&amp;edition=2&amp;language=en&amp;coverage=global&amp;encoding=xhtml_1_0&amp;component=data&amp;item=data&amp;pointer=ned_4#ned_4" onclick="sync(this);return true" shape="rect">Lb+ interface</a></p>


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<h2>Lbis interface</h2>

<p>Lbis is an interface between stand-alone SMLC and U-TDOA
server (PDE), and it is used only for U-TDOA positioning.</p>


<p>On the Lbis interface there is one logical link defined,
RP (Remote PDE) link. One SMLC can be connected to one or more PDEs. One PDE
can be connected to one or more SMLCs. Mapping to PDE is per BSC basis.</p>
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<h2>NWI3 interface</h2>

<p>NWI3 interface is a Nokia proprietary interface to collect
alarms and statistic data from the stand-alone SMLC to NetAct.</p>


<p>Stand-alone SMLC sends alarms and counters directly to
NetAct using the NWI3 interface. NetAct supports all stand-alone SMLC FM and
PM events.</p>
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<h2>RDSP interface</h2>

<p>The Data-Sharing Interface (RDSP link) allows the emergency call positioning
system to fetch certain RN configuration data from the SMLC. It also allows
them to receive notification from the SMLC when data is modified. The Nokia
stand-alone SMLC will support RDSP in SW release 2.2.</p>
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