Operating Modes: Virtual Com, Serial Tunnel, TCP Server, TCP Client, UDP and Modbus Gateway. Security: SSL encryption, HTTPS/SSH management, IP White List access. Event Warning by Syslog, Email, SNMP trap. Industrial Design: DIN-rail mount, wide operating temperature -40 to 70°C, power redundancy 12-48VDC, CE/FCC certified. Worry-Free Guarantee: Each ORing's switch undergoes rigorous reliability and performance testing. We aim to offer customers with high quality products. Please contact us via Newegg if any problem.'