RoamAbout 802.11 DS (Enterasys): A 5.15–5.35 GHz 54 Mbps Direct Sequence Spread Spectrum (DSSS) PC card for the RoamAbout R2 Access Point, the RoamAbout 802.11a wireless LAN PC card uses radio frequencies to transmit data to clients working on desktop PCs, industrystandard notebook PCs, or other handheld devices. The RoamAbout 802.11a wireless PC card has a 32-bit CardBus interface. Compliance with IEEE 802.11a ensures 54 Mbps performance for maximum throughput, as well as vendor interoperability, seamless integration and investment protection.