IPv4, ICMP, TCP, UDP, DHCP Client, SNMPv1,v2c,v3, HTTP, HTTPS, Telnet, SMTP/TLS, RFC2217, 802.1D-2004 RSTP, Security through OpenVPN (client/server) or IPsec (host-to-host or host-to-side) with up to

Industrial 4-Port Serial Device Server, DB9(M), RS-232/422/485, SFP 100/1000 slot,dual power inputs

Industrial 4-Port Serial Device Server, Terminal Block, RS-232/422/485, 3KV Iso,SFP 100/1000,dual pwr

Industrial 4-Port Serial Device Server, Terminal Block, RS-232/422/485,SFP 100/1000 slot, dual pwr