Digi PortServer TS 1. Input voltage: 9 - 30 V. Management protocols: SNMP,HTTP/HTTPS, DHCP. Supported network protocols: UDP/TCP, DHCP/RARP/ARP-Ping, PPP, Telnet RFC 2217, Telnet, Reverse Telnet,Modbus to Modbus/TCP, SNMP. Security algorithms supported: SSH, SSL/TLS, HTTPS. Dimensions (WxDxH): 84.6 x 133.4 x 24.2 mm, Weight: 64 g