Cisco Systems, Inc. WS-X4148-RJ Ethernet Switch Module

The Cisco WS-X4148-RJ is a 48-port 10/100 Mbps Ethernet switch module with RJ-45 copper ports, designed to plug into Cisco Catalyst 4500 Series switches to provide dense, reliable copper access across a campus network backbone. Each WS-X4148-RJ module delivers 48 independent 10/100BASE-TX connections on a single blade, enabling large-scale desk-to-switch connectivity within supported Catalyst 4500 chassis, and it is documented in Cisco data sheets as the 48-port 10/100 module. A power-over-Ethernet variant exists, the WS-X4148-RJ45V, which adds PoE capability to selected ports for powering IP phones, wireless access points, and other PoE devices directly from the switch. As part of the Catalyst 4500 family, the WS-X4148-RJ is referenced in installation guides and product sheets as a 48-port 10/100 module (RJ-45), with exact PoE variants listed separately (WS-X4148-RJ45V), ensuring customers choose the correct option for their power and connectivity needs.