3Com 8760 User Guide - Page 212

CHAPTER 5: COMMAND LINE INTERFACE 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. 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 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). 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. • Set the preamble to long to ensure the access point can support all 802.11b and 802.11g clients. 5-110