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<h1>System impact of Gb over IP</h1>

<p>The system impact of Gb over IP is specified in the sections below.
For an overview, with a list of related topics, see <em>Overview of Gb over
IP</em> in the final version of the documentation.</p>


<p>Gb over IP is an application software product and requires a valid licence
in the BSC. The licensing is based on capacity, that is, the number of PCUs.</p>


<p><a href="NED?action=retrieve&amp;identifier=dn04111802&amp;edition=1&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">Requirements</a></p>


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<h2>Impact on transmission</h2>

<p>Gb over IP has no impact on transmission units, transmission managers
or TCSM2.</p>


<p>If Gb over IP is employed in connection with EQoS, the IP transmission
network must support DiffServ. PCU sets DSCP values for IP transport layer.
For Uplink LLC PDUs, the values are determined by Traffic Class, THP and ARP.
Operator can set the values via PRFILE.</p>
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<p><a href="NED?action=retrieve&amp;identifier=dn04111802&amp;edition=1&amp;language=en&amp;coverage=global&amp;encoding=xhtml_1_0&amp;component=data&amp;item=data&amp;pointer=ned_6#ned_6" onclick="sync(this);return true" shape="rect">Impact on BSS performance</a></p>


<p><a href="NED?action=retrieve&amp;identifier=dn04111802&amp;edition=1&amp;language=en&amp;coverage=global&amp;encoding=xhtml_1_0&amp;component=data&amp;item=data&amp;pointer=ned_10#ned_10" onclick="sync(this);return true" shape="rect">User interface</a></p>


<p><a href="NED?action=retrieve&amp;identifier=dn04111802&amp;edition=1&amp;language=en&amp;coverage=global&amp;encoding=xhtml_1_0&amp;component=data&amp;item=data&amp;pointer=ned_15#ned_15" onclick="sync(this);return true" shape="rect">Impact on Network Switching Subsystem (NSS)</a></p>


<p><a href="NED?action=retrieve&amp;identifier=dn04111802&amp;edition=1&amp;language=en&amp;coverage=global&amp;encoding=xhtml_1_0&amp;component=data&amp;item=data&amp;pointer=ned_16#ned_16" onclick="sync(this);return true" shape="rect">Impact on NetAct products</a></p>


<p><a href="NED?action=retrieve&amp;identifier=dn04111802&amp;edition=1&amp;language=en&amp;coverage=global&amp;encoding=xhtml_1_0&amp;component=data&amp;item=data&amp;pointer=ned_17#ned_17" onclick="sync(this);return true" shape="rect">Impact on interfaces</a></p>


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<h2>Impact on mobile terminals</h2>

<p>Gb over IP has no impact on mobile terminals.</p>
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