802.11 PHY Compatibility – Basic Overview

802.11g <–> 802.11 / 802.11b: When 802.11g (ERP-OFDM) was released in 2003, we needed a way to co-exist with the large installed base of older 802.11 (DSSS) and 802.11b (HR-DSSS) based networks and equipment out there.  The solution to the problem used RTS/CTS control frames to silence the channel before an 802.11g station used any of […]