... CLI) High-performance Support multiple WAN access methods, including static IP, DHCP, L2TP, PPTP, PPPOE, 4G. LTE/ 3G/HSPA+ Support double ... link backup between LTE/ WCDMA and WAN(PPPOE, ADSL) (optional) Support VPN client(PPTP, L2TP, OPENVPN, IPSEC and GRE ... link speed statistics etc. Full protocol support, such as TCP/IP, UDP, ICMP, SMTP, HTTP, POP3, OICQ, TELNET, FTP, SNMP, SSHD ...