Model Number: NSR20-31-#8606 Key Specifications/Special Features: 1 x rs232 console;1 x aux;2 x 10/100base-tx;1 x usb2.0 fic slot: 4. Sim slot: 1. Msu slot: 1. Specification. Model. Feature. Nsr20-51. Nsr20-31. Hardware feature. Product image. Processor. Power pc(466mhz). Ram(default/maximum). 1gb. Forwarding performance. 400kpps. 200kpps. Fixed port. 1 x rs232 console. 1 x aux. 2 x 10/100base-tx. 1 x usb2.0. Slot quantity. Fic slot: 4. Sim slot: 1. Msu slot: 1. Output voltage. Ac: 187~242v maximum current: 0.5a. Dc: -40v~-70v maximum current: 2.5a. Maximum power consumption. 150w. 100w. Operating temperature. 0 ~ 40掳 c. Relative humidity. 5 ~ 90%(non-dewing). Dimension(w*d*h). 440 mm脳335 mm脳66 mm. Software feature. Network interconnection. Lan protocol. Arp, ethernet, vlan/vlan vpn/voice vlan/video vlan/pvlan/super vlan, 802.3x, 802.1p, 802.1q, 802.1x, rstp, mstp, stp, gvrp, gmrp. Wan protocol. Ppp, mp. Network protocols. Ip service. Fast forwarding(unicast/multicast). Tcp, udp, ip. Policy routing(unicast/multicast). Ip application. Ping, traceroute. Dhcp server/dhcp relay/dhcp client. Dhcp snooping. Dhcp snooping option82/dhcp relay option82. Dns client/dns static/dns proxy. Ntp, telnet, tftp server/ftp server. Ip routing. Static routing. Dynamic routing: rip, ospf, bgp, is-is. Multicast routing: igmp-snooping, igmp, pim-dm, pim-sm, mbgp, msdp, ssm. Mpls. Ldp, rsvp(e series). Mpls l3 vpn, mpls l2vpn(e series supports). Rsvp-te, rsvp-frr(e series supports). Ipv6. Ipv6 basic function: ipv6 nd, ipv6 pmtu, ipv6 fib, ipv6 acl. Ipv6 transition technique: nat-pt, ipv6tunnel, 6pe. Static routing. Dynamic routing: ripng, ospfv3, is-isv6, bgp4+. Multicast routing: mld snooping, mld, pim-sm for ipv6, mbgp for ipv6, msdp for ipv6, ssm for ipv6. Network security. Port security. 802.1x. Aaa. Local authentication, radius. Firewall. Acl, packet filter. Data security. Msm, ike, ipsec(e series supports). Other security technique. Nat/napt/nat route-map, urpf, pki, rsa, sshv2.0, ssl, gre, l2tp, local access-group. Network reliability. Suppor Main Export Markets: North America