2002 - cesnet

ers will move and that other types of fibres will be needed for higher speeds(10 Gbps and higher) on long distances (e.g., G.655). After considering thesesbenefits and risks, researchers recommend 5 years to be the most suitable periodof lease.All the foreign projects mentioned above make use of optical amplifying or optoelectronicregeneration along the line. The “Nothing-In-Line approach” of theproject researchers is unique in the area of research and education networks(as far as the researchers have been informed). So far, NRENs from Denmark,Ireland, Netherlands, Poland, Serbia and CERN have expressed their interest inthis approach.In 2002, optical fibres were put into operation for the following lines: Ostrava–Olomouc,Prague–Plzeň, Prague–Pardubice and Prague–Ústí n. L. In all the cases,the deadline for implementation depended on the completion of the first mileon these lines. Wherever it was impossible to lease fibres for the first mile, weopted for the lease of lambda 2.5 Gbps for 12 months.Operators of cable TVs and municipal authorities are important partners for thelease of fibres for the first mile, as they either develop optical infrastructure orown companies established for this purpose.During the first half of 2002, we also succeeded in terminating the operation ofcostly circuits established at the beginning of the gigabit network development,even though in one case (Prague–Liberec line), this meant a conversion fromleased fibres to a purchase of the lambda services. The optimisation of theeconomic and technical design of the CESNET2 topology was a success whichhelped us hold one of the leading positions in Europe (see new TERENA Compendium).For the prices of services for research and education in the Czech Republic,valid during the first half of 2002, see Table 4.2 (exchange rate: CZK 32/EUR 1).Service Capacity Length[km] Price[EUR/month]Microwaves 2 jumps 34 Mbps up to 80 km 2,077Microwaves 3 jumps 34 Mbps up to 120 km 3,084SDH 34 Mbps 100–500 3,811–9,934Colour 2.5 Gbps 100–500 8,143–13,029Fibre up to 40 Gbps 30–500 779–16,286Table 4.2: Prices of services for research and educationin the Czech Republic, first half of 2002For a review of the gigabit circuits of CESNET2 and the methods of their application,see Table 4.3 The Regeneration column specifies the method of signal regeneration:ONS 15104 is a two-way STM-16 generator, Cisco 3512 is an L2 switchused as a regenerator. Lines marked with an asterisk do not make use of regenerationalong the line, only an additional amplification for one colour.High-speed National Research Network and its New Applications 200247