Huawei CloudEngine S5731-L is a series of Gigabit Ethernet (GE) remote unit switches that include all-GE downlink ports and GE Small Form-factor Pluggable (SFP) uplink ports, with different models offering additional gigabit optical or electrical ports as required. Based on simplified architecture, these remote unit switches provide all-gigabit data access to implement simplified network deployment. Supporting optical-electrical Power over Ethernet (PoE), they draw more than 1000 m PoE from central switches and can be used in a wide range of scenarios, including offices, education institutions, hotels, and healthcare facilities, helping enterprises to construct low-carbon buildings.