[vc_row css_animation="" row_type="row" use_row_as_full_screen_section="no" type="full_width" angled_section="no" text_align="left" background_image_as_pattern="without_pattern"][vc_column][vc_column_text] CenturyLink retains top position; U.S. port base grows twelve percent BOSTON, MA, FEBRUARY 14, 2019 โ€“ Vertical Systems Group announces that six companies achieved a position on the 2018 U.S. Carrier Ethernet LEADERBOARD as follows (in rank order based...