This product is either discontinued or we cannot get that from suppliers.
Cisco Catalyst WS-C3850-12X48U-L, Network Ports-48, Port 48 x Gigabit Ethernet Network, Twisted Pair, Gigabit Ethernet, Network 10/100/1000Base-T, Rack-mountable.
The Cisco WS-C3850-12X48U-L Catalyst 3850 Switch provides 48-Ports x 10/100/1000 with 12 100Mbps/1/2.5/5/10 Gbps UPOE Ethernet ports. It is a built-in wireless controller provides full convergence between wired and wireless on a single platform.