NB8WVPN User Guide
YML8WVPN
www.netcomm.com.au
RTS Threshold
Request To Send, set in bytes, specifies the packet size beyond which the WLAN Card invokes its RTS/CTS
(Clear To Send) mechanism. Packets that exceed the specified RTS threshold trigger the RTS/CTS
mechanism. The NIC (Network Interface Card) transmits smaller packet without using RTS/CTS
.
The default setting of 2347 (maximum length) disables RTS Threshold.
DTIM Interval
Delivery Traffic Indication Message (DTIM), also known as Beacon Rate. The entry range is a value between
1 and 65535. A DTIM is a countdown informing clients of the next window for listening to broadcast and
multicast messages. When the NB8WVPN has buffered broadcast or multicast messages for associated
clients, it sends the next DTIM with a DTIM Interval value. AP Clients hear the beacons and awaken to
receive the broadcast and multicast messages. The default is 1.
Beacon Interval
The amount of time between beacon transmissions. Each beacon transmission identifies the presence of
an wireless client (or access point). By default, WLAN passively scan all RF channels and listen for beacons
coming from access points to findasuitableaccess point.
Before a station (wireless client) enters power save mode, the station needs the beacon interval to know
when to wake up to receive the beacon (and learn whether there are buffered frames at the access point).
The entered value is represented in ms. Default is 100. Acceptable entry range is 1 to 0xffff (65535).
XpressTM Technology
Select ‘enable’ to activate in-built XpressTM Technology 1
54gTM Mode.
Select the mode to ‘54g Auto’ for the widest compatibility. Select the mode to ‘54g Performance’ for the
fastest performance with 54g certified equipment. Set the mode to ‘54g LRS’ if you are experiencing
difficulty communicating with legacy 802.11b equipment
54g Protection.
In ‘Auto’ mode the NB8WVPN will use RTS/CTS to improve 802.11g performance in mixed
802.11g/802.11b networks. Turn protection ‘Off’ to maximize 802.11g throughput under most conditions
Preamble Type
Short preamble is intended for application where maximum throughput is desired but it doesn’t co-operate
with the legacy.
Long preamble inter-operates with the current 1 and 2 Mbit/s DSSS specification as described in IEEE Std
802.11-1999
Transmit Power
The Router will set different power output (by percentage) according to this selection.
1. About XpressTM Technology
XpressTM Technology is a Broadcom innovation that dramatically improves wireless performance for suitably equipped client workstations while
ensuring compatibility with 802.11b and 802.11g devices. Basically, XpressTM will communicate at the maximum rate sustainable for each class
of device, and also provide very fast data transfer rates with other XpressTM-compatible network devices allowing a total theoretical bandwidth of
108Mbps.
If you are communicating with XpressTM-equipped wireless network client machines, enable XpressTM ; otherwise, don’t enable.
