The S7703 switches are high-end smart routing switches designed for next-generation enterprise networks. Agile features supported in V2R5C00 and later versions 3. Left-to-rear air flow, high-density wiring 5. PoE+The S7703 chassis is 4 U high (1 U = 44. The S7700 design is based on Huawei's intelligent multi-layer switching technology to provide intelligent service optimization methods, such as MPLS VPN, traffic analysis, comprehensive H-QoS policies, controllable multicast, load. ei S7703 Assembly Chassis. It is widely used in campus networks and data centre core/aggregation nodes to provide advanced control over wireless, voice, video and data.