Keep mixed-speed network segments connected without replacing the entire access path. The Black Box LMC1017A-SFP converts 10/100/1000 Mbps copper Ethernet to 100/10 fiber, giving infrastructure teams a practical way to extend service across existing cabling and fiber uplinks. This converter fits environments where copper endpoints must reach fiber-based aggregation or where older fiber segments still need to stay in service. By translating between copper Gigabit Ethernet and lower-speed fiber links, it supports phased upgrades, remote equipment rooms, and legacy network extensions with less disruption. For teams managing uptime and capital spend, that matters. Instead of forcing a forklift refresh, this converter lets you preserve working infrastructure while bridging the speed gap between access devices and downstream fiber paths. It is a straightforward choice when link compatibility is more important than adding unnecessary complexity.