An alternative to the Cisco Catalyst 4500 fixed 100BaseX line card, this 48-port 100BaseX (SFP optional) care allows customers to mix and match 100BaseX SFP optics on the same line card. This card is ideal for enterprise and commercial customers for fiber-to-the-desktop applications as well as Metro Ethernet, for service providers running point-to-point Fast Ethernet to the home or business.