D-Link's DGS-1500 Smart Pro family switches are designed for small/medium businesses who require functions like L3 Static Routing & Single IP Management (Virtual Stacking) without upgrading to a managed switch. The family integrates advanced management & security functions that are similar to those of a managed switch,  but less complex. The switches feature D-Link Green 3.0 technology,  which provide the added benefit of significant power savings. in addition,  the DGS-1500-28P's 10/100/1000 Mbps ports are Po E-enabled,  offering ease-of-use & green features like Time-based Po E,  which shuts the power off at a predetermined times. Compliant with 802.3af & 802.3at,  these switches are capable of feeding power to devices of up to 30 Watts. Management options for the switches include SNMP,  Web Management,  Smart Console Utility,  & Compact CLI. The family also supports ACL filtering & D-Link's Safeguard Engine. The DGS-1500 family uses Auto Voice VLAN,  ensuring higher priority for voice traffic. The DGS-1500-20 & DGS-1500-28 are both fanless which allows them to emit less heat & noise than a standard switch,  making them suitable for office environments. The DGS-1500-28P & DGS-1500-52 both feature smart fans that use a thermal sensor that can detect temperature change,  the smart fans can react accordingly by utilizing different fan speeds for different temperatures. The Smart Fan feature enables the built-in fans to automatically turn on at a certain temperature,  providing continuous,  reliable & eco-friendly operation of the switch. D-Link is striving to take the lead in developing innovative & power-saving technology that does not sacrifice operational performance or functionality. The DGS-1500 Smart Pro family implements D-Link Green Technology,  which 
 Includes:: a power saving mode,  smart fan,  reduced heat dissipation,  & cable length detection. The power-saving features include being able to schedule when to turn off LEDs & ports when not in use,  and