n is often touted as the brass ring for VoIP and video applications. Will simply replacing our existing APs with 802.11n APs improve the performance of VoIP and video applications?
VoIP and video applications are certainly enhanced by the benefits of high speeds of 802.11n but only if the devices (e.g., WiFi phones) running these applications are 802.11n capable. Using legacy Wi-Fi devices with 802.11n APs will not provide much advantage as applications will continue to run on legacy data rates.