Case Study Ethernet-over-PDH/SDH/SONET Ukrtelecom, Ukraine End-to-End Ethernet Service over Existing PDH/SDH Infrastructure Ukraine has steadily modernized and expanded its domestic trunk infrastructure since gaining independence in December 1991. The number of telephone lines in the country, for example, rose from 12.1 million to 17.2 million between 2004 and 2005 alone, an impressive, if not amazing growth of approximately 42 percent in twelve

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