The original partners were TCI, Time Warner Cable, Comcast, and Cox. In 1995, Multimedia Cable Network System (MCNS) was formed. In 1994, 802.14 was chartered to develop a media access control over an HFC. For example, if one has a cable modem that only supports DOCSIS 1.0, and the system is running 2.0, the connection will be established at DOCSIS 1.0 data rates. Ĭross-version compatibility has been maintained across all versions of DOCSIS, with the devices falling back to the highest supported version in common between both endpoints: cable modem (CM) and cable modem termination system (CMTS).
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Previously branded as DOCSIS 3.1 Full Duplex, these technologies have been rebranded as part of DOCSIS 4.0. CableLabs released the full specification in October 2017. This technology enables multi-gigabit symmetrical services while remaining backwards compatible with DOCSIS 3.1. DOCSIS 4.0 : Improves DOCSIS 3.1 to use the full spectrum of the cable plant (0 MHz to ~1.8 GHz) at the same time in both upstream and downstream directions.cable company to fully transition to the DOCSIS 3.1 platform. At the end of 2016, Mediacom announced it would become the first major U.S. In the United States, broadband provider Comcast announced in February 2016 that several cities within its footprint will have DOCSIS 3.1 availability before the end of the year. DOCSIS 3.1 technology also includes energy management features that will enable the cable industry to reduce its energy usage, and the DOCSIS-PIE algorithm to reduce bufferbloat. The new specifications eliminated 6 MHz and 8 MHz wide channel spacing and instead use narrower (25 kHz or 50 kHz wide) orthogonal frequency-division multiplexing (OFDM) subcarriers these can be bonded inside a block spectrum that could end up being about 200 MHz wide. DOCSIS 3.1 : First released in October 2013, and subsequently updated several times, the DOCSIS 3.1 suite of specifications support capacities of up to 10 Gbit/s downstream and 1 Gbit/s upstream using 4096 QAM.DOCSIS 3.0 : Released in August 2006, DOCSIS 3.0 significantly increased data rates (both upstream and downstream) and introduced support for Internet Protocol version 6 (IPv6).DOCSIS 2.0 : Released in December 2001, DOCSIS 2.0 enhanced upstream data rates in response to increased demand for symmetric services such as IP telephony.DOCSIS 1.1 : Released in April 1999, DOCSIS 1.1 standardized quality of service (QoS) mechanisms that were outlined in DOCSIS 1.0.DOCSIS 1.0 : Released in March 1997, DOCSIS 1.0 included functional elements from preceding proprietary cable modems.D3 for DOCSIS 3).ĭOCSIS was developed by CableLabs and contributing companies, including 3Com, ARRIS, BigBand Networks, Broadcom, Cisco, Comcast, Conexant, Correlant, Cox, Harmonic, Hitron Technologies, Intel, Motorola, Netgear, Technicolor, Terayon, Time Warner Cable, and Texas Instruments. The version numbers are sometimes prefixed with simply "D" instead of "DOCSIS" (e.g.
It is used by many cable television operators to provide Internet access (see cable Internet) over their existing hybrid fiber-coaxial (HFC) infrastructure. Standard for computer networking over a cable television systemĭata Over Cable Service Interface Specification ( DOCSIS) is an international telecommunications standard that permits the addition of high-bandwidth data transfer to an existing cable television (CATV) system.
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