Crestron ZUMMESH-JBOX-20A-PLUG handleiding

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Handleiding

Best Practices – DOC. 6689H Installation and Setup of Crestron RF Products • 17

7. The 802.15.4 channels 25 and 26 are free; therefore, the Lighting network is set to

channel 26. Channel 26 is the channel most removed from Wi-Fi networks and

therefore should be the least susceptible to interference from Wi-Fi networks.

Channel 26, however, also has the shortest range in most Crestron products and

therefore may be less reliable than other channels. Careful examination of the site

survey is necessary to determine the most appropriate channel assignment.

Because of careful testing and planning, each network is positioned so that it does not

interfere with the other networks or receive large amounts of outside interference.

Large RF Network Installations

If a large number of RF networks are installed in a single installation, it may not be possible

to give each network its own channel. In large environments, networks can be placed on the

same channels as long as devices are far enough apart to ensure that the RF signals do not

overlap for similar channels. The illustration below shows how Wi-Fi 802.11b/g networks

can be spaced by channel so that they do not interfere with each other (as viewed from

overhead).

Wi-Fi Channel Allocation Map

Physically separating the networks reduces the amount of interference among networks on

the same channel. A standard channel map cannot be created for these installations

because multiple networks reside on each channel.

Channels 1, 6, and 11 are usually chosen for Wi-Fi networks because they are the only

three non-overlapping Wi-Fi channels.

The 802.15.4 channels 15, 20, 25, and 26 do not overlap with Wi-Fi channels 1, 6, and 11;

therefore, channels 15, 20, 25, and 26 can be used on 802.15.4 networks in conjunction

with this scheme. For this scheme to function properly there must be low interference

across the entire 2.4 GHz band.

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