Broadcom's fourth generation DOCSIS 3.0 chipset bond up to 24x8 DOCSIS channels to achieve 1Gbps downstream speed -- triple the downstream bandwidth and double the upstream bandwidth from previous generations.
Significantly, Broadcom said the new system-on-a-chip (SoC) solution is pin compatible and leverages the same software and system design as its widely deployed BCM3383 DOCSIS 3.0 cable gateway.
Broadcom also notes that a home gateway based on this chipset could also support 802.11ac Wi-Fi, enabling gigabit speed to extend over the last mile broadband connection and to Wi-Fi clients inside the home.
http://www.broadcom.com/press/release.php?id=s732079