D-Link DSL-2640U User Manual

 

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Channel—

802.11b and 802.11g use channels to limit interference from 

other devices. If you are experiencing interference with another 2.4Ghz 
device such as a baby monitor, security alarm, or cordless phone, then 
change the channel on your router. 

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Rate—

the wireless link rate at which information will be received and 

transmitted on your wireless network. 

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Multicast Rate—

the rate at which a message is sent to a specified group of 

recipients. 

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Basic Rate—

the set of data transfer rates that all the stations will be 

capable of using to receive frames from a wireless medium. 

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Fragmentation Threshold—

used to fragment packets which help improve 

performance in the presence of radio frequency (RF) interference. 
 

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RTS Threshold (Request to Send Threshold)—

determines the packet size 

of a transmission through the use of the router to help control traffic flow.  

 

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DTIM Interval—

sets the Wake-up interval for clients in power-saving mode. 

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Beacon Interval—

a packet of information that is sent from a connected 

device to all other devices where it announces its availability and readiness. 

A beacon interval is a period of time (sent with the beacon) before sending 
the beacon again. The beacon interval may be adjusted in milliseconds (ms). 

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a technology that utilizes standards based on 

framebursting to achieve higher throughput. With Xpress Technology 
enabled, aggregate throughput (the sum of the individual throughput 

speeds of each client on the network) can improve by up to 25% in 802.11g 
only networks and up to 75% in mixed networks comprised of 802.11g and 

802.11b device. 
 

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54g Mode— 

54g is a Broadcom Wi-Fi technology. 

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54g Protection—

the 802.11g standards provide a protection method so 

802.11g and 802.11b devices can co-exist in the same network without 
“speaking” at the same time.  Do not disable 54g Protection if there is a 

possibility that a 802.11b device may need to use your wireless network.  In 
Auto Mode, the wireless device will use RTS/CTS (Request to Send / Clear 

to Send) to improve 802.11g performance in mixed 802.11g/802.11b 
networks. Turn protection off to maximize 802.11g throughput under most 

conditions. 
 

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Preamble Type—

 this is the length of the CRC (Cyclic Redundancy Check) 

block for communication between the router and wireless clients. High 
network traffic areas should select Short preamble type.   

 

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Transmit Power—

 this is the percentage of power that should be 

transmitted from your wireless router.  Select from 20%, 40%, 60%, 80%, and 
100%.