Cisco WS-X6748-SFP= network switch module

48-port High Performance Mixed Media Gigabit Ethernet interface module, Requires SFP; CEF720, Spare Designed for high performance Enterprise and Service Provider distribution, core layers, data-center, Web-hosting and Metro Ethernet applications, CEF720 mixed media interface modules provide line-rate gigabit Ethernet forwarding using twisted pair or fiber optic cabling with the following operational advantages:
Supervisor engine-Supported by all versions of Supervisor Engine 720

- Base forwarding mode and performance-Uses the central CEF engine located on the supervisor engine to forward packets up to 30 Mpps per system in its base configuration
- Distributed forwarding upgrade option and performance-When equipped with the optional field-upgradeable dCEF forwarding daughter cards, the interface module delivers optimal performance, up to a sustained 48 Mpps per slot.
- Optics-Support hot-pluggable modular small form-factor pluggable (SFP).