SS2GR4000 Series is a L2 Gigabits intelligent switch designed for carrier and MAN networks. It supports comprehensive QoS, enhanced VLAN functions (VLAN VPN, Voice VLAN, QinQ, N:1 VLAN Translation), Ethernet Ring Protection Protocol (G.8032), classified bandwidth control, intelligent security control, OAM(Operations, Administration and Maintenance), manageability functions and Triple-Play services which fulfill the network requirements demanded by carrier network, MAN access. SS2GR4000 Series switch offers green features like IEEE 802.3az (Energy Efficient Ethernet), Fan-less design, which can dramatically lower power consumption, achieve green energy and save the cost for the carrier and MAN users.