DGFV338 ProSafe Wireless ADSL Modem VPN Firewall Router Reference Manual
Wireless Configuration 3-7
v1.0, April 2007
Wireless Advanced Options
Advanced Wireless Router Settings
The Wir eless Advanced Options settings are intended for administrator use—and should be used
with caution and only as directed by NETGEAR. The Advanced Settings menu controls the
following:
•RTS Threshold (Default: 2346). The Request to Send Threshold is the packet size that
determines if the CSMA/CD (Carrier Sense Multiple Access with Collision Detection)
mechanism or the CSMA/CA mechanism should be used for packet transmission. With the
CSMA/CD transmission mechanism, the transmitting station sends out the actual packet as
soon as it has waited for the silence period. With the CSMA/CA transmission mechanism, the
transmitting station sends out an RTS packet to the receiving station, and waits for the
receiving station to send back a CTS (Clear to Send) packet before sending the actual packet
data.
•Fragmentation Length (Default: 2346). This is the maximum packet size used for
fragmentation. Packets larger than the size programmed in this field will be fragmented. The
Fragment Threshold value must be larger than the RTS Threshold value.
•Beacon Interval (Default: 100). The Beacon Interval specifies the interval time (between
20ms and 1000ms) for each beacon transmission.
•DTIM (Default: 1). The DTIM (Delivery Traffic Indication Message) specifies the data
beacon rate between 1 and 255.
•Preamble Type (Default: Auto). A long transmit preamble may provide a more reliable
connection or a slightly longer range. A short transmit preamble gives better performance.
Auto will automatically handle both long and short preambles.
•SuperG Mode. If enabled, the Wireless Router will enable data compression, packet bursting
and large frame support. This feature is available only for SuperG compatible wireless
devices.
– If you Enable 108Mbps Features, the throughput of the 802.11g connection will be
doubled (typically 54 Mbps) to 108 Mbps and the wireless gateway will be SuperG
enabled. SuperG can be used only on Channel 6.
Warning: The ProSafe DGFV338 is already configured with the optimum settings. Do
not alter these settings unless directed by NETGEAR support. Incorrect
settings may disable the wireless firewall unexpectedly.