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<p>(or multiple communities) Most cable hubs are used in conjunction with an <a href="page.php?w=Hybrid_fibre-coaxial">HFC Plant</a>. Combined IP video and data enters a hub via a microwave or fiber optic transport circuit and gets routed to QAM devices such as a <a href="page.php?w=cable_modem_termination_system">cable modem termination system</a> which changes the IP data into an RF QAM to be combined with other services (such as <a href="page.php?w=video_on_demand">video on demand</a>, <a href="page.php?w=switched_video">switched video</a>) and</p><p>
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