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DOCSIS employs a mixture of deterministic access methods for upstream transmissions, specifically time-division multiple access (TDMA) for DOCSIS 1.0/1.1 and both TDMA and S-CDMA for DOCSIS 2.0 and 3.0, with a limited use of contention for bandwidth reservation requests. In TDMA, a cable modem requests a time to transmit and the CMTS grants it ...
How satellite internet works. Satellite Internet generally relies on three primary components: a satellite – historically in geostationary orbit (or GEO) but now increasingly in Low Earth orbit (LEO) or Medium Earth orbit MEO) [24] – a number of ground stations known as gateways that relay Internet data to and from the satellite via radio waves (), and further ground stations to serve each ...
The Starlink system has multiple modes of connectivity including direct-to-cell capability as well as broadband satellite internet service. Direct-to-cell provides connectivity to unmodified cellular phones and is being offered globally in partnership with various national cellular service providers.
For wider area communications, wireless local area network (WLAN) is used. WLANs are often known by their commercial product name Wi-Fi. These systems are used to provide wireless access to other systems on the local network such as other computers, shared printers, and other such devices or even the internet.
American wireless carrier Nextel Communications field tested wireless broadband network technologies including Flash-OFDM in 2005. [53] Sprint purchased the carrier in 2006 and decided to deploy the mobile version of WiMAX , which is based on Scalable Orthogonal Frequency-Division Multiple Access (SOFDMA) technology.
Internet access is a facility or service that provides connectivity for a computer, a computer network, or other network device to the Internet, and for individuals or organizations to access or use applications such as email and the World Wide Web.
One NZ also offers DOCSIS cable modem broadband within the former TelstraClear's network. [57] In June 2016, Vodafone upgraded its cable network to DOCSIS 3.1, in order to support gigabit speeds. [58] One NZ currently offers a single option on the cable network. The standard plan provides up to 912 Mbit/s download and 104 Mbit/s upload. [59]
In a hybrid fiber-coaxial cable system, television channels are sent from the cable system's distribution facility, the headend, to local communities through optical fiber subscriber lines. At the local community, an optical node translates the signal from a light beam to radio frequency (RF), and sends it over coaxial cable lines for ...
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