"VSC8504 is a quad port Gigabit Ethernet (GE) PHY with Microsemi's next-generation EcoEthernet™ IEEE 802.3az Energy Efficient Ethernet (EEE) for optimizing power in Enterprise networks, data centers, and consumer electronics. VSC8504 supports four dual media copper/fiber ports with QSGMII MAC interfaces, delivering Carrier-quality Synchronous Ethernet (SyncE) for TDM backhaul links, cellular base stations, and other SyncE applications. VSC8504 features Microsemi’s innovative EcoEthernet technology that supports Energy EEE through ActiPHY™ automatic link powerdown and the PerfectReach™ intelligent algorithm that adjusts power based on cable length. The VSC8504 device optimizes power consumption in all link operating speeds. It includes integrated temperature monitoring and smart fan control for extending system life and reducing BOM costs. Adjustable LED brightness control further reduces power consumption for end users."