Intermec MobileLAN 21 Series, Системное руководство

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Installing the 21XX
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This chapter explains how to install the access points in your network, provides some
external antenna guidelines and provides some tips on how to position access points
to improve your network performance.
Installation Guidelines
Intermec recommends that you have Intermec or other certified providers conduct a site
survey to determine the ideal locations for all of your network components. A proper
site survey requires special equipment and training. The following general practices
should be followed in any installation:
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Locate access points centrally within areas requiring coverage.
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Overlap access point radio coverage areas to avoid coverage holes.
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Try to position the access point so that its LEDs are visible. The LEDs are useful for
troubleshooting.
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Install wired LAN cabling within node limit and cable length limitations.
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Use an uninterruptible power supply (UPS) when AC power is not reliable.
Proper antenna placement can help improve range. For information about antenna
options, contact your local Intermec representative. For more guidelines, see “External
Antenna Placement Guidelines” later in this chapter.
When determining ideal locations for the access points, be aware that you may see
network performance degradation from microwave ovens, cordless telephones, and
other access points. For more information, see the next sections.
Note: Microwave ovens, cordless telephones, and other access points do not degrade the
network performance of the 802.11a radio.
Microwave Ovens
Microwave ovens operate in the same frequency band as 802.11b and OpenAir radios;
therefore, if you use a microwave oven within range of your wireless network, you may
notice network performance degradation. Both your microwave oven and your wireless
network will continue to function, but you may want to consider relocating your
microwave oven out of range of your access point.
For the 802.11b radio, the access point has a Microwave Oven Robustness parameter
that you can enable to minimize potential interference between your microwave oven
and your wireless network. For help, see “Configuring 802.11b Radio Advanced
Parameters” in Chapter 5.