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 ports (12 interfaces per port). The module is equipped with LEDs providing status information for the module and the individual 10BaseT Ethernet port connections.This module requires supervisor engine module software release 2.3(1) or later.