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DOCSIS: Developed by CableLabs and approved by the ITU in March 1998, Data Over Cable Service Interface Specification defines interface standards for cable modems and supporting equipment. With certification from CableLabs, manufacturers are able to produce cable modems for retail, so consumers no longer have to depend on leased cable modems from their cable providers. DOCSIS specifies downstream traffic transfer rates between 27 and 36 Mbps over a radio frequency (RF) path in the 50 MHz to 750+ MHz range, and upstream traffic tranfer rates between 320 Kbps and 10 Mbps over a RF path between 5 and 42 MHz. But, because data over cable travels on a shared loop, individuals will see tranfer rates drop as more users gain access.
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