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<div class="div">
<h1>External Interfaces of Nokia UltraSite EDGE BTS</h1>

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<div class="topic">
<h2>Antenna
interface</h2>

<p>The total amount of antenna connectors is 12. Six of them
are optional.</p>
</div>


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<div class="topic">
<h2>Abis
interface</h2>

<p>The Transmission unit takes care of connecting Nokia UltraSite
EDGE BTSs with each other and to the rest of the network (for example, BSC,
and Nokia Talk-family and Nokia MetroSite sites) through the Abis interface.
The transmission media can be either a radio link or a wire line (E1/T1).
The Nokia UltraSite EDGE BTS supports 16 kbit/s, 32 kbit/s, and 64 kbit/s
Abis TRX RF signaling. The O&amp;M signaling speed can be 16 kbit/s or 64
kbit/s.</p>
</div>


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<div class="topic">
<h2>Radio
Transmission </h2>

<p>The following radio link transmission unit is available
for the Nokia UltraSite EDGE BTS:</p>


<ul>
<li><p><em>FXC RRI</em>:
16 x 2 Mbit/s, support for two Flexbus interfaces, grooming, branching, and
loop protection support, cross-connection on 8 kbit/s level.</p>
</li>
</ul>


<p>FXC RRI transmission units are connected to the Nokia FlexiHopper
Microwave Radio or Nokia MetroHopper Radio with a coaxial cable referred to
as Flexbus. Moreover, when multiple cabinets are located at the same site,
it is possible to connect BTS cabinets together by using the Flexbus cables,
provided by FXC RRI units. </p>


<p>The FXC RRI operates as a repeater and interconnects Nokia
UltraSite EDGE BTS and the BSC using point-to-point, chain, star, or loop
network configurations.</p>
</div>


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<div class="topic">
<h2>Optical
Fiber Transmission</h2>

<p>Third party devices provide the Optical Fiber Transmission.</p>
</div>


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<div class="topic">
<h2>Wire
Line Transmission</h2>

<p>The following wire line transmission units are available
for Nokia UltraSite EDGE BTS:</p>


<ul>
<li><p><em>FXC E1</em>: 4
x 2 Mbit/s (E1) PCM connections, four coaxial 75-ohm TX and four coaxial 75-ohm
RX connectors for E1 use, grooming, branching, and loop protection support,
cross-connection down to 8 kbit/s level.</p>
</li>
<li><p><em>FXC E1/T1</em>:
4 x 2 Mbit/s (E1) or 4 x 1.5 Mbit/s (T1) PCM connections, four twisted pair
120-/100-ohm TX/RX connectors for either E1 or T1 use, grooming, branching,
and loop protection support, cross-connection down to 8 kbit/s level. Interfaces
can be configured independently either E1 or T1 mode.</p>
</li>
<li><p><em>FC E1/T1</em>:
1 x 2 Mbit/s (E1) or 1 x 1.5 Mbit/s (T1) PCM connection, one coaxial 75-ohm
TX and one coaxial 75-ohm RX connector for E1 use, one twisted pair 120-/100-ohm
TX/RX connector for either E1 or T1 use.</p>
</li>
</ul>


<p>The FXC E1 and FXC E1/T1 transmission units interconnect
the Nokia UltraSite EDGE BTS and the BSC using point-to-point, chain, star,
or loop network configurations. The FC E1/T1 operates as the termination point
in a star or chain topology network.</p>
</div>


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<div class="topic">
<h2>Power
supply interface</h2>

<p>Power supply alternatives are -48VDC and 230 VAC input
voltage.</p>
</div>


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<div class="topic">
<h2>ILMT
interface</h2>

<p>This is the interface between the Nokia SiteWizard PC and
Base Operations and Interfaces (BOI) unit. The ILMT interface is physically
a Local Management Port (LMP) connector located in the BOI unit, and it is
a multi-point communication link conforming NOKIA Q1. ILMT interface supports
also managing transmission units.</p>
</div>


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<div class="topic">
<h2>Q1
interface for transmission units</h2>

<p>This provides control line to co-sited transmission equipment.
Inside the Nokia UltraSite Support is space for customer equipment, for example,
LTE. There is one Q1 common to the installed equipment.</p>
</div>


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<div class="topic">
<h2>Q1
interface for Site Support System</h2>

<p>This provides control line to the Nokia UltraSite Support
and Nokia UltraSite EDGE BTS integrated battery backup.</p>
</div>


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<div class="topic">
<h2>Alarm
and control interface</h2>

<p>This is used for external controls and for collecting external
alarms for Base Operations and Interfaces (BOI) unit. There are 24 alarm lines
and 6 control lines.</p>
</div>


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<div class="topic">
<h2>External
clock interface</h2>

<p>This is used for clock synchronisation between Nokia UltraSite
EDGE BTS cabinets. This interface consists of frame number and frame clock
signals.</p>
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