Arris TM822g DOCSIS 3.0  Telephony Cable Modem [Bulk Packaging] Toll grade voice performance equal to the industry leading TM602 or TM722 family of products Two independent 96MHz wide RF tuners to receive downstream channels up to 1GHz Loop Diagnostics for remote testing and troubleshooting of in house wiring Configurable options for loop current, loop voltage management, and ringing waveform Advanced Diagnostics for easy troubleshooting - Call Quality Metrics for last 50 calls This product is not recommended for use with Comcast as their compatibility requirements change frequently Please confirm compatibility with your provider prior to purchase Optional battery not included