... mount structure, it is composed of a frame, a main control card, a business card and other main parts. A single ... production efficiency.Main Features:1. Carrier-grade reliability: system main control unit, power supply and other key modules all can be copied ... Value-Added Service function: L2/L3/L4 wire speed switching, QoS,MPLS,NAT,bandwidth control,multicast and other advanced functions, providing a ...