Preamble - 3Com 3CRWE876075 User Manual

C 5: C L
HAPTER OMMAND INE
Default Setting
Command Mode
Command Usage
Example
Enterprise AP(if-wireless g)#radio-mode g
Enterprise AP(if-wireless g)#

preamble

This command sets the length of the signal preamble that is used at the start of a
802.11b/g data transmission.
Syntax
Default Setting
Command Mode
Command Usage
I
NTERFACE
b+g mode
Interface Configuration (Wireless - 802.11g)
• For Japan, only 13 channels are available when set to g or b+g modes.
When set to b mode, 14 channels are available.
• Both the 802.11g and 802.11b standards operate within the 2.4 GHz
band. If you are operating in g mode, any 802.11b devices in the service
area will contribute to the radio frequency noise and affect network
performance.
preamble [long | short-or-long]
• long - Sets the preamble to long (192 microseconds).
• short-or-long - Sets the preamble to short if no 802.11b clients are
detected (96 microseconds).
Short-or-Long
Interface Configuration (Wireless - 802.11b/g)
• Using a short preamble instead of a long preamble can increase data
throughput on the access point, but requires that all clients can support a
short preamble.
• Set the preamble to long to ensure the access point can support all
802.11b and 802.11g clients.
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