Nortel SR2101009E5. Supported WAN type: PPP, PPPoEFRF.12, HDLC, BCP MLPPP, FRF.16 (UNI/NNI). Routing protocols: RIPv1, RIPv2, OSPF, BGP4, ECMP, Management protocols: elnet SSHv2, FTP/TFTP, SNMPv1, SNMPv2c, RADIUS, TACACS+, TCL, VoIP protocols: SIP ALG, cRTP. Firewall security: DDoS, H.323 & SIP, VPN support: IPSec VPN, DES, 3DES, AES, SHA1, MD5. Flash memory: 16 MB, Internal memory: 256 MB. Safety: UL/cUL 1950, IEC60950, Certification: EMC: FCC 15/A; EN 55022, EN 300 386-2, EN61000-3-2 & EN61000-3-3