arris tm822g - docsis 3.0 8x4 telephony cable modem (renewed) arris arris touchstone e-mta tm822g toll grade voice performance equal to the industry leading tm602/tm722 family of products. two independent 96mhz wide rf tuners to receive downstream channels up to 1ghz. configurable options for loop current, loop voltage management, and ringing waveform loop diagnostics for remote testing and troubleshooting of in-house wiring. advanced diagnostics for easy troubleshooting. the touchstone docsis 3.0 8x4 embedded multimedia terminal adaptor (e-mta) tm822g delivers two lines of primary line voice over ip (voip), ultra-high speed data access, and multiple battery pack options* (not included) to support telephony service during power outages. designed to support the services desired most by advanced users, the tm822g enables the home or small business user to address productivity needs with the speed and performance found only in the 8x4 bonded channel cable environment along with industry-leading arris voice. with the tm822g, cable operators can offer data services at speeds greater than 300mbps to their subscribers to compete against vdsl and fiber to the home threats. optional battery is not included. comcast is constantly changing what is and is not compatible so please verify prior to purchase.