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ARRIS Surfboard Docsis 8X4 Cable Modem / Telephone Certified for XFINITY - Download Speed: 343 Mbps (TM822R)The TM822R is a telephony modem designed for XFINITY customers desiring to own their device. Using DOCSIS 3.0 technology the TM822R provides high-speed data service using bonded send and receive channels for greater bandwidth. The TM822R incl..