EnGenius EWS660AP User Manual page 37

Wireless Mode: Supports 802.11b/g/n mixed mode in 2.4GHz and 802.11a/n mixed mode in 5GHz. Note that 5GHz settings are
only available for dual radio models.
Channel HT Mode: The default channel bandwidth is 20/40MHz. The larger the channel bandwidth, the better the transmission
quality and speed. This option is only available for 802.11n modes only.
Extension Channel: Use the drop-down menu to set the Extension Channel as Upper or Lower channel. An extension channel is a
secondary channel used to bond with the primary channel to increase this range to 40MHz allowing for greater bandwidth. This
option is only available when Wireless Mode is 802.11n and Channel HT Mode is 20/40 MHz or 40MHz.
Channel: Select the appropriate channel.
Transmit Power: Select the transmit power for the radio. Increasing the power improves performance, but if two or more access
points are operating in the same area on the same channel, it may cause interference.
Data Rate: Use the drop-down list to set the available transmit data rates permitted for wireless clients. The data rate affects the
throughput of the access point. The lower the data rate, the lower the throughput, but the longer transmission distance.
RTS/CTS Threshold: Specifies the threshold package size for RTC/CTS. A small number causes RTS/CTS packets to be sent more
often and consumes more bandwidth.