Fortress Technologies ecure Wireless Access Bridge User Manual

Fortress Bridge: Configuration

27

Distance
The 

 setting configures the maximum distance—from 

 

to 

 miles, in increments of 1 mile—for which the radio must 

adjust for the propagation delay of its transmissions.

In a point-to-multipoint deployment, the 

 setting on the 

networked radios of all member Bridges should be the number 
of miles separating the two Bridges with the greatest, 
unbridged distance between them. In Figure 3.1, above, the 

 setting would be 

miles: the longest distance in the 

network between two Bridges without another Bridge between 
them.

Propagation delay is not a concern at distances of one mile 
and under, at which you should leave the setting at 

 mile (the 

default for both radios).

Additional radio configuration can be done through the Bridge 
CLI (refer to Section 6.7).

Preamble
The short preamble is used by virtually all wireless devices 
currently being produced. The default 

 setting of 

 

is therefore optimal for most network implementations. 

Some older 802.11b devices, however, still use the long 
preamble, and if the network must support such devices, you 
must configure the radio they will communicate with to use a 

 setting of 

.