_:vb51021517 "14.59"^^ . _:vb51021518 . . "Digital Transport and Broadband Access Technologies" . _:vb51021517 . _:vb51021518 . _:vb51021517 . _:vb51021518 "63670.0"^^ . _:vb51021518 . . _:vb51021517 . .