March Networks GW-DS150N, Manual, Page: 64 / 65

1
Wi-Fi device. WMM Power Save uses mechanisms included in the IEEE 802.11e standard and is
an enhancement of IEEE
802.11 legacy power save. With WMM Power Save, the same amount of data can be transmitted
in a shorter time while allowing the Wi-Fi device to remain longer in a low-power “dozing” state.
16. What is Gl?
Gl stands for Guard Interval. It's a measure to protect wireless devices from crossinterference.
If there are two wireless devices using the same or near channel, and they are close enough,
radio interference will occur and reduce the radio resource usability.
17. What is STBC?
STBC stands for Space-Time Block Coding, which is a technique used to transfer multiple copies
of data by multiple antenna, to improve data transfer performance. By using multiple antennas, not
only data transfer rate is improved, but also the wireless stability.
18. What is WPS?
WPS stands for Wi-Fi Protected Setup. It provides a simple way to establish unencrypted or
encrypted connections between wireless clients and access point automatically. User can press a
software or hardware button to activate WPS function, and WPS-compatible wireless clients and
access point will establish connection by themselves. There are two types of WPS: PBC
(Push-Button Configuration) and PIN code.