Cisco WS-X4920-GB-RJ45 for 4900M Switch 20-port 10/100/1000 RJ-45 half-card

Cisco WS-X4920-GB-RJ45 Module 20x RJ-45 1Gb for Catalyst 4900M

Cisco Catalyst WS-X6908-10G-2T 6900 Series 8-Port 10 Gigabit Ethernet Fiber Modu

Cisco WS-X4920-GB-RJ45 Module 800-29748-05 20x RJ-45 1Gb for Catalyst 4900M

Cisco WS-X4920-GB-RJ45 20-Port Gigabit Ethernet Line Card with RJ-45 Connectors

Cisco WS-X4908-10GE 4900M 8 port 10GE half card with X2 interfaces

Cisco WS-X6908-10G-2T 6900 Series 8-Port 10 Gig Ethernet Fiber Module *

Cisco WS-X6848-SFP-2T 48 Port SFP Fiber Gigabit Ethernet WS-F6K-DFC4-A