what is docsis 3 0 cable modem

{"cid":"91191186","title":"Euro Docsis 3.0 Cable Modem With Wifi CM-3051-2 8 Downstream X4 Upstream","imgUrl":"https:\/\/img.ismap.com\/nimg\/80\/28\/5269e6cdbcc470dc247cc1a07969-200x200-1.jpg","attrs":{"Model Number":"CM-3051-2","Minimum Order Quantity":"1000pcs","Delivery Time":"25-35 work days","Certification":"Labs Certification","Place of Origin":"Shenzhen, China","Payment Terms":"T\/T, L\/C","Packaging Details":"Standard Carton","Model":"DOCSIS 3.0 and EuroDOCSIS 3.0 Cable Modem","Application":"Ethernet over Coaxial Cable of CATV System with Docsis CMTS","Ports":"Lan 2* 10\/100\/1000 Mbps RJ45","Stream":"8 Downstream x 4 Upstream","Material":"Plastic","Color":"Black&White","Warranty":"1 Year"}}

{"cid":"91216951","title":"IC BCM3349KFBG Docsis-R 2.0 Single Chip Computer Cable Modem ROHS","imgUrl":"https:\/\/img.ismap.com\/nimg\/27\/aa\/8e028a3d36ea2993065e4a9c0277-200x200-1.jpg","attrs":{"Price":"negotiate","Brand Name":"original","Model Number":"BCM3349KFBG","Minimum Order Quantity":"Minimum Order Quantity:\t10 PCS","Delivery Time":"Within 3days","Certification":"ROHS COMPLIANT","Place of Origin":"Original Manufacturer","Payment Terms":"T\/T in advance, Western Union, Xtransfer","Supply Ability":"1000","Packaging Details":"Standard Packaging","Condition":"Original 100%","Port":"Shenzhen or Hongkong","Lead Time":"1-3 working days"}}