Cisco 2948G Hardware Installation Guide - Page 32

Switch Description Chapter 1 Product Overview Note Catalyst 2948G-GE-TX switch only supports 1000 Mbps and full-duplex modes on SFP modules. Except for the 1000BASE-T SFP module, all of the SFP modules are used to establish fiber-optic connections. You use fiber-optic cables with Lucent (LC) connectors to connect to an SFP module. The SFP modules support 850 to 1550 nanometer nominal wave lengths. These field-replaceable modules provide the uplink optical interfaces, laser send (TX) and laser receive (RX). For a detailed description of Gigabit Ethernet ports see the "Connecting To an SFP Module" section on page 4-12. Switch Features Table 1-1 describes the Catalyst 2948G, 2948G-GE-TX, and 2980G switch features. Table 1-1 Catalyst 2948G, 2948G-GE-TX, and 2980G Switch Features Feature Ethernet speeds Description • Ethernet (10BASE-T) interface to workstations and repeaters • Fast Ethernet (100BASE-T) interface to workstations, servers, switches, and routers Note Autonegotiation of link speed on each 10/100 and 10/100/1000 port allows migration to 100BASE-T or 1000BASE-T from a 10BASE-T or 100BASE-T installed base. Standard management and support • Gigabit Ethernet (1000BASE-T) copper and Gigabit Ethernet (1000BASE-X) fiber-optic interface for backbone interconnection of high-performance switches and routers • Layer 2 forwarding with an aggregate forwarding rate of greater than 17.8 million packets per second • 16,000 MAC addresses per system Catalyst 2984G, 2948G-GE-TX, and 2980G Switch Hardware Installation Guide 1-4 78-6286-05