All above switches support 12~48VDC power inputs except for HMG-828 (24/48VDC)
Supports STP, RSTP, Dual Homing & Couple ring redundancy
Proprietary protocol X-Ring with < 10 ms recovery time for HME-423E, HMG-828 & HMG-1628
Proprietary protocol X-Ring with < 300 ms recovery time for HME-800 & HME-621E
DHCP Server/Client, SNMP / RMON network management, VLAN configuration, IGMP snooping, QoS
Flexibility security: Port based and MAC based IEEE802.1X, RADIUS
Software upgrade via TFTP
CLI, Web based management, SNMP, Telnet server for management