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Turnstone Systems Inc., based in California, makes copper loop management software and hardware for telecom carriers.
Founded in 1998 and based in California, US, Turnstone Systems Inc. develops software and hardware for copper loop management. Its Copper CrossConnect CX100 lets telephone access providers remotely evaluate and manage DSL connections on copper lines. Its customers are almost entirely Competitive Local Exchange Carriers. Matrix Partners was a new investor in 1998, and in February 2000 the company raised USD 87 million in an IPO, selling 3 million shares at USD 29.
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