The Ethernet switching module (10BaseT 48 port) provides 48 switched, 10-Mbps (10BaseT Category 3 UTP), full- or half-duplex Ethernet port connections using 4 telco RJ-21 connectors (12 interfaces per connector). This module requires supervisor engine module software release 4.2(1) or later.The LEDs provide status information for the module and the individual 10BaseT Ethernet port connections.