Features and Benefits    IEC 61850-3, IEEE1613 (power substations), NEMA TS2 (traffic control systems), and EN50121-4 (railway applications) compliant Port-based VLAN to enhance security/network performance and  ease network planning 802.1p priority queues and port-based QoS to increase determinism Smart web-based management makes configuration easy Universal power supply range, 12/24/48 VDC or 110/220 VDC/VAC -40 to 85°C operating temperature range   Introduction  The PowerTrans PT-7324 smart switch is designed to meet the demands of power substation automation systems (IEC 61850-3, IEEE1613), traffic control systems (NEMA TS2), and railway applications (EN50155/EN50121-4). ThePT-7324 is also equipped with smart features, "Class of Service" features suitable for multimedia applications, and port-based VLAN features that can be used to segment your network without being restricted by physical connections. If you do not want to receive too many broadcast packets, the broadcast storm filtering feature will discard broadcast packets if the number of such packets exceeds a threshold in a preset period of time.