The DGS-3130 Series switches are Lite Layer 3 Stackable Managed Switches designed to connect end-users in a secure enterprise or metro Ethernet access network. These switches support multicast, and enhanced security, making them an ideal Gigabit access layer solution. The DGS-3130-54TS provides 48 10/100/1000 Mbps Gigabit Ethernet ports. The DGS-3130-54PS provides 48 10/100/1000 Mbps Power over Ethernet (PoE) Gigabit Ethernet ports. The DGS-3130-54S provides 48 SFP Gigabit Ethernet ports. Each 10/100/1000 Mbps port on the DGS-3130-54PS supports the 802.3af and 802.3at PoE standards. The default power budget for these models is 370 watts and can be expanded to 740 watts with the DPS-700 RPS. The switches are also equipped with an USB 2.0 port, allowing the user to boot images and upload configuration files directly from, as well as conveniently save syslog files onto a USB 2.0 storage device.