Operating Modes : Virtual Com, Serial Tunnel, TCP Server, TCP Client, UDP Redundant multiple host devices :5 host devices : Virtual COM, TCP Server, TCP Client mode 4 IP ranges : UDP Supports RS-232/422/485 NAT-PASS through Security: SSL data encryption, HTTPS, SSH Dual redundant Ethernet port support redundant mode(Recovery time < 10ms) Ethernet switch mode enable Daisy Chain Event Warning by Syslog, Email, SNMP trap, and Beeper Configurable by Web-based and Windows utility (DS-Tool) Available in 1/4/8/16 Serial Ports.