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RBBN SONS ALERT: Rosen Law Firm Announces Filing of Securities Class Action Lawsuit Against Ribbon Communications, Inc.; Important Deadline – RBBN,…

NEW YORK, Dec. 12, 2018 /PRNewswire/ -- Rosen Law Firm, a global investor rights law firm, announces the filing of a class action lawsuit on behalf of purchasers of the securities of Ribbon Communications, Inc. f/k/a Sonus Networks, Inc. (NASDAQ: RBBN) from January 8, 2015 through March...

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