3com Switch 5500-EI

24 in-line power 10/100 ports, for data switching and PoE distribution using the same cabling; 4 SFP slots.
Scalable stackable design with resilient stacking up to eight units high, or 384 Fast Ethernet ports using 2 Gbps stacking bandwidth (4 Gbps full duplex).
12.8 Gbps switching capacity, 9.5 Mpps forwarding rate, maximum.
Wirespeed performance across all ports within a stack delivers optimal throughputs and bandwidth for business-critical data and high-speed communications.
Multi-layer operation with static routes, RIP-based Layer 3 functionality, OSPF, and PIM-DM and PIM-SM.
3Com XRN® Stacking Technology provides for the creation of eight-unit stacks that offer chassis-like availability and resiliency over traditional aggregated-trunk configurations. The entire stack is managed as a single-IP management entity, with "masterless" sharing of critical routing information across all units for fast failure recovery.
Load-sharing and cross-stack trunking features help eliminate dropped packets, clear up traffic bottlenecks, and improve server availability.
Integrated distributed security enforcement.
Advanced, time-based Access Control Lists (ACLs) help safeguard key network resources from unauthorized access and data corruption.
User-based authentication and DES 56-bit or 168-bit encryption help secure Layer 3 protocols and management controls.
Shared 3Com Operating System consolidates administrative control over the entire switching infrastructure—contributing to a more unified network environment and providing unparalleled edge-to-core visibility and control.
Built-in support for AC- and DC-powered operations enables you to leverage existing power schemes and cost-effectively extend power to the edge of the network.
Available DC Redundant Power Supply (RPS), designed by Eaton Powerware Corporation, a leading provider of integrated power systems