Zcom ZAC Series, User Manual

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Chapter 5 Management Page 48
RIFS : RIFS (Reduced Interframe Spacing) is a means of reducing overhead and thereby increasing
network efficiency
HT Protect : Enable HT (High Throughput) protect to ensure HT transmission with MAC mechanism.
Under 802.11n mode, wireless client can be divided into HT STA and Non-HT STA, among which
the one with HT protect enabled gets higher throughput.
Preamble Type : It defines some details on the 802.11 physical layer.
“
Long
” and “
Auto
” are
available.
RTS Threshold : The IEEE 802.11n ZAC Wireless CPE sends RTS (Request to Send) frames to
certain receiving station and negotiates the sending of a data frame. After receiving an RTS, that
STA responds with a CTS (Clear to Send) frame to acknowledge the right to start transmission. The
setting range is 0 to 2346 in byte. Setting it too low may result in poor network performance.
Leave it at its default of 2346 is recommended.
Fragmentation Threshold : Specify the maximum size in byte for a packet before data is
fragmented into multiple packets. Setting it too low may result in poor network performance. Leave
it at its default of 2346 is recommended.
Beacon Interval : Specify the frequency interval to broadcast packets. Enter a value between 20
and 1024.
DTIM Interval : DTIM, which stands for Delivery Traffic Indication Message, is contained in the data
packets. It is for enhancing the wireless transmission efficiency. The default is set to 1. Enter a value
between 1 and 255.
Channel Protection Mode : This is to avoid conflict with other wireless network and boost the ability
of your device to catch all 802.11a transmissions. However, it may decrease wireless network
performance. Compared to CTS-Self; the transmission amount of CTS-RTS is much lower.
Distance : To decrease the chances of data retransmission at long distance, the IEEE 802.11n ZAC
Wireless CPE can automatically adjust proper ACK timeout value by specifying distance of the two
nodes.
Access Control
The Access Control appoints the authority to wireless client on accessing IEEE 802.11n ZAC Wireless
CPE, thus a further security mechanism is provided. This function is available only under AP/Router