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<h2>Optical line equipment</h2>

<p>If there is a need for SDH transmission for capacity reasons
and there are fibers available, Nokia recommends the world leading SDH and
Dense Wavelength Division Multiplexing (DWDM) equipment from Marconi or Tellabs
to be used in the mobile networks. The collaboration supports Marconi in developing
these products towards the Mobile Networks requirements with the help of Nokia.</p>


<p>By working together on the transmission layer 1 issues
in a partnership mode ensures that both companies understand the specific
needs of mobile networks. It enables the companies to offer the most efficient
solution in this area.</p>


<p>The comprehensive product portfolios of Marconi and Tellabs
extend from modem size compact access SDH to terabit-sized DWDM systems.</p>
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