Cisco offers a variety of connectivity, expansion and upgrade modules and cards to accommodate the customer specific needs. Cisco's components are easily and inexpensively upgradeable as customer requirements change.The 48-port 10/100TX switching module provides 48 switched, 10/100-Mbps autosensing, full- or half-duplex ports. Four RJ-21 telco connectors (12 ports per connector) use Category 5 UTP cable. The module has enhanced quality of service (QoS) features.