Zoom X4 ADSL 2/2+ Modem/Router/Gateway/Firewall. DSL connection type: ADSL. Modem speed: 24576 Kbit/s. Routing protocols: RIP-1, RIP-2, IP. Filtering: IP, VPN support: PPTP, L2TP. Certification: CE, UL, C-UL, FCC Part 15B, FCC Part 68, CS-03, RoHS