Zy XELs ES-3124F is a carrier-class L2+ managed access switch. With robust performance in network resiliency, Qo S, IP multicasting & security, the ES-3124F is the ideal solution for cable, utilities or municipality operators & service providers to adopt in Active Ethernet ETTx deployments.ES-3124F supports 4 Gb E SFP slots for establishing fiber rings to offer better network resiliency, while ES-3124F has 24 100BASE-X SFP open slots for superior fiber aggregation capability. ES-3124F can be combined with ES-2108-F to form an end-to-end fiber access solution. The model supports the latest single fiber transceiver (BX type) for better system flexibility & easier fiber installation. As an alternative power source, BPS prevents the system from total blackouts caused by internal AC power supply failures, & IEEE802.3ad Link aggregation also reduces network downtime by providing more packet paths & performs bandwidth aggregation on critical paths. The 4G uplink not only provides superb bandwidth, but also forms a high-resiliency ring topology, which greatly improves network uptime & stability. The ES-3124F comes with proven Qo S & VLAN functions to ensure smooth operation. For instance, Qo S features like multi-layer (L2/L3/L4) ACL, eight priority queues, DSCP & WFQ scheduling algorithm all maximize bandwidth usage & improve network service quality, while MVR & IGMP snooping enables effective IP TV multicasting. In addition, Fast Leave eradicates streaming quality disturbance when users surf between different channels, & bandwidth control with granularity of 64kbps brings better bandwidth administration to network operators. With 256 static VLAN entries, the ES-3124F sufficiently satisfies the growing need for video, Vo IP & access identification functionalities required by converged networks to deliver multiple services. Furthermore, The 4K PVID offers the best flexibility for VLAN configuration, while the L2VPN service is made possible by the VLAN stacking (Q-in-Q) feature. The ES-3124F supports the 802.3ah operation, administration & maintenance (OAM) standard to facilitate device management & Zy XEL Net Atlas Enterprise EMS software for central management. In addition, comm&-line interface (CLI) & text configuration are also offered for the staff to manage the network more conveniently & effectively.