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Message: <blockquote data-quote="perfectenamy" data-source="post: 9752911" data-attributes="member: 340292"><a href="http://www.slt.lk/data/investor/pdf/annu_2007/inpages/operations_review/operations_review.htm" target="_blank">http://www.slt.lk/data/investor/pdf/annu_2007/inpages/operations_review/operations_review.htm</a>Opticle Fiber NetworkOur full transition from microwave to  high capacity islandwide optical fibre infrastructure will provide the  foundation for the Next Generation Network (NGN). The NGN environment  will enable us to host multiple services on a single network by  utilising simpler technology.            This is the infrastructure of the future and  consists of five Metro Rings (each 1.2 Gbps), one Central Ring (2.5  Gbps), an Auxiliary Central Ring (2.5 Gbps), a North-East Central Ring  (2.5 Gbps), an East-Uva Central Ring (2.5 Gbps), a Southern Ring (2.5  Gbps) and a Northern Ring (upto Vavuniya) (622 Mbps).            We are also planning to upgrade the Auxiliary Central Ring further to 10 Gbps in 2008.            The five Metro Rings, the Central Ring and the  Southern Ring are already in commission. They consist of a total of  1260 km of cabling.            In addition we have in place the Metro Super  Highway which consists of two rings, each 10 Gpbs (STM-64). They are the  Metro North Super Highway and the Metro South Super Highway.            Both rings connect 20 SLT sites as follows:            The Metro North Super Highway Ringconsists of 11 nodes -  Colombo,Wattala, Ja-Ela, Raddolugama,Katunayake, Kadawatha,  Kelaniya,Welikada, Maradana, Kollupitiya/LibertyPlaza and Slave Island.           The Metro South Super Highway Ringconsists of 9  nodes - Colombo,Havelock Town, Mount Lavinia,Ratmalana, Piliyandala,  Maharagama,Homagama, Kotte and Maradana.</blockquote>

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