The C4000BZ is for bonded (2 line) DSL service, not for single line dsl or fiber service. The C4000BZ is tested and certified to run at these speeds* on the CenturyLink® and Brightspeed High-Speed Internet network: Technology Type Tested speed ADSL2+ pair bond up to 40 Mbps VDSL pair bond up to 140 Mbps PRODUCT OVERVIEW Leading the next generation of WiFi, the C4000BZ WiFi 6 xDSL Router is powered by the industry’s latest WiFi Certified 6 802.11 standard that is up to 3x faster than the previous AC generation of WiFi, with additional data capacities in a dense environment to handle current and future home networks. Lightning-fast WiFi speeds powers ultrasmooth 4K streaming, online gaming, smart home automation, and more. AT A GLANCE Get ultra-fast wireless speeds for better 4K streaming, gaming or video conferencing experience. Up to 3 Gbps Speed - 600+2400 Mbps with 2-stream connectivity† • Networking Optimized Dual-Core Processor Powerful processor boosts wireless, wired and WAN-to-LAN performance • 160MHZ Channel Support*- Doubles the speeds as offered by 80MHz channels to provide gigabit speeds for compatible mobile devices and laptops • 1024-QAM - 38% increase in data rate compared to 256-QAM 802.11ac Supports all ADSL or VDSL profiles up to 17a • One Wi-Fi SSID for the entire home