Arris TM602G Telephony Modem [Bulk Packaging] - Docsis Networks ISP Incompatibility Issues Are the Buyer's Responsibility (Verify Compatibility With ISP Before Purchase) Depending on location, the TM602g OFTEN works with: Comcast, Time Warner Cable, BrightHouse, Mediacom, and more! The TM602g is the most economical solution providing both internet AND telephony access! The TM602 delivers two lines of carrier-grade Voice over IP (VoIP) and High-Speed Data access Super Easygoing 30-Day Returns! (Optional backup battery Sold Separately)