Not compatible with: Verizon, AT&T, or CenturyLink. Not compatible with bundled voice services. Cable Modem only (no WiFi router). Compatible with major U. S cable providers. Supports IPv4 and IPv6 Internet browsing standards DOCSIS 3.1 cable modem, the newest technology being offered by Cable Internet Providers. Backward compatible with DOCSIS 3.0. 32 DOWNLOAD and 8 UPLOAD Channels. BEST for 300 Mbps Internet plans and above! Perfect for streaming 4K HD video and online gaming. Gigabit Ethernet ports. Create 2 Home Networks, both capable of gigabit speeds. (Note, Cox Cable does not support activation of 2nd Ethernet port)