GE Dash 3000 Service Manual page 89

2000966-542D
Configuration: Service Mode settings
Term
FREQ. Bandwidth at which the Dash wireless card communicates with wireless
BANDS network.
Dash provides below frequency bands to communicate:
• All Bands (2.4GHz and 5.1GHz)
• 2.4GHz Band Only
• 5.1GHz Band Only
• 5.1GHz Band priority over 2.4GHz Band
• 2.4GHz Band priority over 5.1GHz Band
Default value of the frequency band is "All Bands" (2.4GHz and
5.1GHz).
RTS Request to Send (RTS) and Clear to Send (CTS) is the communication
THRESHOLD exchange used to reduce collisions introduced by the hidden node
problem. RTS/CTS exchanges will occur for unicast data frames that
are of a larger size than the RTS threshold value. Using a small
threshold value causes RTS frames to be sent more often, consuming
more of the available bandwidth, therefore reducing the apparent
throughput of the network packet. However, the more RTS packets that
are sent, the quicker the system can recover from interference or
collisions -- as would be the case in a heavily loaded network, or a
wireless network with much electromagnetic interference. If however, it
is found that enabling RTS/CTS results in decreased throughput, it is
recommended to disable the feature, even if the number of collisions
are reduced. A valid range for RTS Threshold is 0 - 2347 bytes.
Use the default RTS Threshold value 2347, unless otherwise specified
in the wireless network design."
FRAG. Fragmentation Threshold specifies the maximum frame size a wireless
THRESHOLD device can transmit without fragmenting the frame. A valid
Fragmentation Threshold is a numeric value within the range of 256 to
2346.
Use the default Fragmentation Threshold value 2346, unless otherwise
specified in the wireless network design.
QOS CONFIG Quality of service (QoS) is the ability to prioritize traffic from the Dash
above other, less critical, data on the wireless network.
Dash supports configuring the QoS settings according to WMM
standard guidelines. Options WMM and NONE are available to
configure the QoS Settings.
Default QoS configuration is WMM.
Dash also supports the upstream Quality of Service with the default
values for QoS parameters (CWmin, CWmax, AIFS, TXOP and DSCP
markings), which are available in BOOT MENU for configuration.
Dash 3000/4000/5000
Definition
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