Cisco Expansion Module WS-X4640-CSFP-E=

Cisco Catalyst WS-C3560X-24T-L-RF Layer 3 Switch – 24 Ports – Manageable – Gigabit Ethernet – 10/100/1000Base-T – Refurbished – 3 Layer Supported – Twisted Pair – 1U High – Rack-mountable – Lifetime Limited Warranty WS-C3560X-24T-L-RF