3com WL-575 Manual De Usuario
6-118
C
HAPTER
6: C
OMMAND
L
INE
I
NTERFACE
Default Setting
b+g mode
Command Mode
Interface Configuration (Wireless - 802.11g)
Command Usage
• 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.
area will contribute to the radio frequency noise and affect network
performance.
Example
preamble
This command sets the length of the signal preamble that is used at the start of a
802.11b/g data transmission.
This command sets the length of the signal preamble that is used at the start of a
802.11b/g data transmission.
Syntax
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
• short-or-long - Sets the preamble to short if no 802.11b clients are
detected (96 microseconds).
Default Setting
Short-or-Long
Command Mode
Interface Configuration (Wireless - 802.11b/g)
Command Usage
• 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.
short preamble.
• Set the preamble to long to ensure the access point can support all
802.11b and 802.11g clients.
Outdoor 11a Building to Building(if-wireless g)#radio-mode g
Outdoor 11a Building to Building(if-wireless g)#