Pre-Terminated Systems Market by Component (Cables, Connectors, Adapter Plates, Patch Panels, Patch Cords, Cassette Modules), Industry Vertical (Government & Defense, Enterprises & Data Centers, IT & Telecom, Energy & Utilities, Manufacturing, Banking, Financial Services, & Insurance), By Region, and Key Companies - Industry Segment Outlook, Market Assessment, Competition Scenario, Trends and Forecast 2021-2031