Editing DOCSIS (section)

== Equipment ==
[[File:ARRIS CM820B DOCSIS Cable Modem.jpg|thumb|A DOCSIS 3.0 cable modem]]
[[File:CMTS Arris Cadant C4 CityPlay Amiens.jpg|thumb|upright|A [[cable modem termination system]] (CMTS)]]

A DOCSIS architecture includes two primary components: a cable modem located at the customer premises, and a [[cable modem termination system]] (CMTS) located at the CATV headend.<ref name="DOCSIS 3.1">{{cite tech report |title=DOCSIS 3.1 |institution=CableLabs |number=CM-SP-PHYv3.1-I19-211110 |at=Physical Layer Specification }}</ref>

The customer PC and associated peripherals are termed [[customer-premises equipment]] (CPE). The CPE are connected to the cable modem, which is in turn connected through the HFC network to the CMTS. The CMTS then routes traffic between the HFC and the Internet. Using provisioning systems and through the CMTS, the cable operator exercises control over the cable modem's configuration.<ref name="DOCSIS 3.1" />

DOCSIS 2.0 was also used over microwave frequencies (10&nbsp;GHz) in Ireland by [[Digiweb]], using dedicated wireless links rather than HFC network. At each subscriber premises the ordinary CM is connected to an antenna box which converts to/from microwave frequencies and transmits/receives on 10&nbsp;GHz. Each customer has a dedicated link but the transmitter mast must be in line of sight (most sites are hilltop).<ref>{{cite web |title=Wireless Broadband Internet |url=http://ogierelectronics.com/broadband-wireless.php |website=Ogier Electronics |access-date=December 5, 2023 }}</ref>