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DOCSIS provides a set of standards and a certifying authority by which cable companies can achieve cross-platform functionality in Internet delivery. DOCSIS standards are applied to both ends of the connection: the CM (Cable Modem) and the CMTS (Cable Modem Termination System).
The standards are set and verified by CableLabs, a non-profit industry consortium. CableLabs also refers to the DOCSIS specification "CableModem" or "CableModem/DOCSIS".
This is the equipment at the cable companies Head-End that interfaces with both the RF plant and the traditional data side of an ISP. This equipment can operate either as a router or as a bridge with your modems. Overall, the Cisco Universal Broadband Router series of CMTS equipment has become the defacto standard in CMTS equipment.
The Signal to Noise Ratio is an engineering term for the power ratio between a signal (meaningful information) and the background noise. The higher the SNR, the better.
It is the entire RF link between the CMTS and the CM(cable modem).
Each cable TV installation serving a community is known as a "cable system", and the operator of the system is called the "system operator". Most system operators run cable systems in more than one community. Therefore, the vast majority of them are Multiple System Operators.
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