Information Technology Reference
In-Depth Information
TABLE 13.4
Typical Wireless Link Coverage Distances
Range,
†
m
IEEE speed
Throughput,* Mbps
High
4.3
40-125
Medium
2.6
55-200
Standard
1.4
90-400
Standard low
0.8
115-550
*Typical measured data transfer rate.
†Maximum distances shown are for open areas, minimums for indoor/obstructed areas.
dation in data rate allows the wireless network to continue operating, even in diffi-
cult conditions. This greatly adds to the robust nature of the technology. You can
much more easily tolerate a slow network connection than a dropped one.
Situating Wireless Network Bridges
Using the numbers in Table 13.2, you can begin to plan logically where to place the
wireless bridges. Figure 13.8 shows a typical floor plan and a possible placement of
wireless bridge antennas. Note that it is the placement of the antenna that is criti-
cal, not the placement of the bridge!
Here, we have placed two AP bridges in the two front hallways, to provide cov-
erage of the lobby and nearby offices and portions of the modular office space.
Office walls will often attenuate the WLAN signal, so this assures good coverage in
Offices
Storeroom
1
3
4
Lobby
Modular office
space
Entry
Large room
(signal-blocking walls)
2
Offices
FIGURE 13.8
Typical access point placement within a building.
