You’ve been victimized by marketing hype. Some manufacturers promise that you can get 125-Mbps throughput from their 802.11g routers, even though the 802.11g standard only calls for 54 Mbps. The trick? They use proprietary methods to get speeds higher than 54 Mbps, so it only works with hardware from the same manufacturer using the same proprietary methods. If you mix and match hardware from other manufacturers, you won’t get the same speed boost.
Besides, 125 Mbps is a purely theoretical speed, it’s not achievable in real world conditions, even if you use the same proprietary hardware for your entire network. It assumes that there’s no interference; that all devices on the network use the same, compatible hardware; and that you’re transferring a file made up of all 00000s that is incredibly compressible.
