... EFM) in their FTTB/C deployments. Among different EFM technologies, EFM over copper is filling the bandwidth gap between high ... based on Quadrature Amplitude Modulation (QAM) and the latest Ethernet technologies. The VDSL-24 aggregates traffic from QAM-based VDSL ... utilization. With a broad array of fully integrated, advanced technologies, the IV24 enable service providers and system administrators to ...