BW2251 User Guide v1.0
Nov. 2013
Page 109 of 187
Radio
– specify which wireless interface of BW2251 is shown. [wlan1(2.4G)/wlan2(5G)]
Mode
– show the radio operation mode. (AP mode or Bridge mode)
Domain
– show the regulatory domain
Static Channel / Auto Channel
– show the channel that the access point will use to transmit and
receive information
If DCA (Dynamic Channel Allocation) is enabled, this will show Auto Channel and
its channel number is chosen in auto channel selection.
If use static channel selection, this will show Static Channel and its channel
number.
DCA (Dynamic Channel Allocation) is useful feature to help choose the best
channel automatically and reduce interference among many Access Points.
Band
– show the working bands on which the radio is working.
wlan1:four bands listed: 2.4GHz(11g only) , 2.4GHz(11n HT20) , 2.4GHz(11n HT20/40plus),
2.4GHz(11n HT20/40minus)
wlan2: four bands listed:5GHz(11a), 5GHz(11n HT20) , 5GHz(11n HT20/40plus), 5GHz(11n
HT20/40minus) .
By default, the HT20/40 is recommended.
Tx Power
– show the BW2251 transmission output power (without antenna gain) in dBm.
RTS Threshold
–the AP sends Request to Send(RTS) frames to a particular receiving station and
negotiates the sending of a data frame. After receiving an RTS, the wireless station responds with a
Clear to Send(CTS) frame to acknowledge the right to begin transmission. The default value is
2347.[recommend].
Fragment Threshold
–It specifies the maximum size for a packet before data is fragmented into
multiple packets. If you experience a high packet error rate, you may slightly increase the
fragmentation threshold. Setting the fragmentation threshold too low may result in poor network
performance. Only minor modifications of this value are recommended. The default value is
2347.[recommend]
Beacon Interval
–the Beacon Interval value indicates the frequency interval of the beacon. A beacon
is a packet broadcast by the AP to synchronize the wireless network.
DCA
– Enable or Disable DCA service. DCA can help to choose the best working channel
automatically. And static channel selection will be forbidden if DCA is enabled.
DCA(Dynamic Channel Allocation) solution automatically select the optimal operational frequency
channel when power up and periodically monitors the environment and adjusts for the best
operational frequency channel.
DCA threshold
– specify the value (in minutes) of DCA threshold. This threshold is been used to
judge if there is no wireless users connected during this time. And if yes, BW2251 will monitor the
environment and adjust channel for the best operational one.
If wireless network environment is stable which means auto channel selection
needn’t do frequently, set a big value for DCA threshold to gain a stable wireless
users’ connection.
If wireless network environment changes continually, frequent auto channel
selection is needed. So set a relative small value for DCA threshold to let channel
change based on wireless environment.
