The ZyXEL XGS3600/MGS3600 Series are Telco-class Layer 2 Carrier Ethernet switches ideal for Ethernet service aggregation and extension. The Series meet all IEEE 802.3/u/x/z/ab/ae standards and are an excellent solution that provides an ideal combination of affordability with capabilities for Carrier Access networking which include: IEEE 802.3ah MAC Layer OAM; IEEE 802.1ag Ethernet CFM, ITU-T Y.1731 Ethernet OAM Performance Monitoring; ITU-T G.8031 Ethernet Linear Protection and ITU-T G.8032 Ethernet Ring Protection Switching. Consistent service quality and reliable connecting ability in a converged network is the key for Carrier to connect and satisfy customers; therefore the ability to control traffic flow and set traffic policy becomes more critical than ever. The ZyXEL XGS3600/MGS3600 series L2 GbE Switches offer wire-speed flow control that classifies and prioritizes the incoming packets according to the predefine QoS policies that meet requirements of service providers. In terms of classification, the Differentiated Services Code Point (DSCP) field and the 802.1p Class of Service (CoS) field are identified to assess the priority of incoming packets. Classification and reclassification can be based on criteria as specific as rules based on IP, MAC addresses, VLAN ID or TCP/ UDP port number. For bandwidth management, the XGS3600/MGS3600 series provide 8 priority queues per port for different types of traffics, allowing service providers to set policy-based rate limitations that take full advantage of constrained network resources and guarantee the best performance.