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The Cisco® Catalyst® 2948G-GE-TX Gigabit Ethernet Switch is a fixed-configuration switch that provides Gigabit Ethernet connectivity for small and medium-sized networks ( Figure 1) . The Cisco Catalyst 2948G-GE-TX switch enhances network performance and productivity with the highest 10/ 100/ 1000-Mbps port density in a 1 rack unit ( RU) form factor in the networking industry. The Cisco Catalyst 2948G-GE-TX is also an affordable solution for delivering gigabit-speed connectivity to the desktop over Category 5 copper cabling.

The Cisco Catalyst 2948G-GE-TX has autosensing 48 10/ 100/ 1000BASE-T ports and 4 small form-factor pluggable ( SFP) ports, providing a total of 52 Gigabit Ethernet ports. The 4 SFP ports are wire-speed, and the 48 10/ 100/ 1000BASE-T ports can burst to Gigabit Ethernet line rate and share 12 Gbps of capacity ( or 6 Gbps full-duplex) into the switching fabric. All ports can use Cisco Gigabit EtherChannel® or IEEE 802.3ad for high-speed interconnection applications. All ports use the standard IEEE 802.3x flow control ( PAUSE frame) mechanism to control Gigabit Ethernet host traffic. The Cisco Catalyst 2948G-GE-TX uses the same feature-rich Cisco Catalyst OS software as the Cisco Catalyst 2948G, the Cisco Catalyst 2980G-A, and Cisco Catalyst 4000 Series switches.
Gigabit Ethernet

Today' s knowledge workers are placing higher demands on their networks. They need to run multiple, concurrent applications, and to do this productively, they require higher bandwidth from the network. For example, a worker joins a team conference call using IP videoconferencing, sends a 10-MB spreadsheet to meeting participants, broadcasts the latest marketing video for the team to evaluate, and queries the customer relationship management ( CRM) database for the latest real-time feedback. Meanwhile, the multigigabyte system backup starts in the background and the latest virus updates are pushed to the client. Bandwidth enhancement beyond 100 Mbps— enabled by Gigabit Ethernet— provides for a smoothly operating network that can evolve.

Cisco makes the transition to Gigabit Ethernet faster and easier with a full suite of Gigabit Ethernet products including the Catalyst 3750 Series switches and the Catalyst 2970 Series switches. The Catalyst 3750 Series switches are an innovative product line that improves LAN operating efficiency by combining industry-leading ease of use and the highest resiliency available for stackable switches. This product series represents the next generation in desktop switches, and features StackWise technology, a 32-Gbps stack interconnect that allows customers to build a unified, highly resilient switching system— one switch at a time. The Catalyst 2970 Series switches are affordable Gigabit Ethernet switches that deliver wire-speed intelligent services for small and medium businesses and enterprise branch offices. Featuring a complete set of intelligent services, the Catalyst 2970 Series switches can enhance network performance and increase productivity. At speeds of 1000 Mbps, Gigabit Ethernet provides the bandwidth that networks need to meet new and evolving network demands, alleviate bottlenecks, and boost performance while increasing the return on existing infrastructure investments.