SAN JOSE, Calif. -- JDS Uniphase Corporation (Nasdaq: JDSU; and TSX: JDU) today announced that it has completed its acquisition of Acterna, Inc., and is moving ahead with its integration plan.

JDS Uniphase acquired privately held Acterna on a cash-free, debt-free basis for approximately $450 million in cash and approximately 200 million shares of JDS Uniphase common stock.

On May 23, 2005, JDS Uniphase announced the definitive agreement to acquire Acterna, a leading worldwide provider of broadband and optical test and measurement solutions for telecommunications and cable service providers and network equipment manufacturers. The acquisition doubles the size of JDS Uniphase's addressable communications market to more than $5 billion, and expands the Company's product portfolio to enhance the deployment of Internet Protocol (IP)-based data, voice and video services over optical long haul, metro, fiber-to-the-home, DSL and cable networks.

The acquisition of Acterna is expected to be financially accretive immediately. Based on un-audited results for the most recent fiscal year ended March 31, 2005, Acterna reported a gross margin in excess of 50 percent and earnings before income tax, depreciation or amortization (or EBITDA) of more than 11 percent of total revenues.

JDS Uniphase Corp.