Hello!
We have Cisco WAP4410N-G5 with firmware 2.0.4.2 and two notebooks with 802.11n adapters (Intel Centrino N130 and Ralink RT3090).
Network scheme: Server 1Gbit LAN <> Gigabit switch <> WAP4410N <> notebooks. On server we have samba, http and FTP.
We tried to download file from server via http/ftp and samba and the maximum speed we get about 23 Mbit/s. It is really very poor performance for 802.11n standard.
We tried different firmware versions for WAP4410N and settings (20 and 40 MHz, N only and etc) - no luck.
We replaced WAP4410N with WRT610N and get about 85-100Mbit/s in the same enviroment.
Maybe it is a hardware problem with our WAP4410N?