Absnacf -Main type5 of ATM and SDH nchvorlu services SDH structures and ATM-SDH-ATM structures. General problem when such networb are-being built is the availability bewee' dirrcrent ' IC of or no availability of SDH equipment to operate with the ATM traffic. Most of SDH multiplexers according to their technical characteristics are able to operate with ATM traffic. The multiplexers of Alcatel and Siemens producing companies Network structures built on the base of ATM and SDH technologies are shown on fig. I. The ATM technology can be Thc variety of network technologies, used in diffcrent presented with corporative network having some number of networks (from local computer networks UP to main subscribers and amount of delivered services (see table I).networks) causes the need in different interfaces employment. Such network plays as a part of SDH-ATM netwnrk, and the Their function -the coordination of two incompatible or installation of communication session is created with ATMpartly compatible network technologies, between subscribers commutation principles. Commutation time delay in ATM of which data transfer is been done. Those interfaces execute noge is 24 -40 ps according to ATM technical the coordination between two technologies type, taking into ' characteristics. The communication between ATM and SDH account the kind of service, special information, necessary for networks is crcated with the use of standard set of rates for communication session installation, and useful information ATM equipment: 50 MbiVs, 100 MbiUs, but on the SDH volumes, being transmitted between two or S e v e d rates: 155 MbiWs, 620 MbiWs and so on. subscribers. Obviously, that the coordination of two absolutely different network technologies is the urgent task for network owners tuday. Such problem exists loday in Ukraine too, because the number of networks, built on different technologies, increaces vigorously. That is why the question arises, which interface equipment is mostly accessible, effective and has a lowest price. As a rule, such interfaces are already created by corresponding producing companies and present for subscriber, who wants to transmit a grent volume of information, only the interest fiom the view of its capacity at the moment, service kinds, so as real time delays, appearing in interface equipment of the both technologies.Today in Ukraine the SDH technology is the most widespread data transfer technology, which is used as in main networks, so in city networks. Besides SDH technology, the ATM technology is used in'such networks too, but ATM technology is less spread in spite of its advantages: traffic control ability, easy network configuring, big amount of services and so on. am shown in the PpIr, 50 the ATM network packet Productive cspcity, pnliminnry accumulation time delay a d time delay in this paper.
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