Crestron ZUMMESH-JBOX-20A-PLUG handleiding

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Best Practices – DOC. 6689H Installation and Setup of Crestron RF Products • 3

RF Channels

Each RF network type divides the communication band into separate communication

channels. Crestron 2.4 GHz products use two different methods to divide the band:

• infiNET EX, Extended Range, Z

ūm Net, and Zūm Mesh devices use 802.15.4

channel mapping, which provides 16 channels numbered 11–26. Each channel is

non-overlapping, which ensures that a device communicating on one channel

cannot affect devices communicating on any other channels. Zūm Mesh in-room

devices are restricted to the use of channels 15, 20, 25, and 26.

• When the network is formed, the in-room network coordinator automatically selects

the channel with the least amount of interference.

NOTE: The references to 802.15.4 channels in this document relate to infiNET EX,

Extended Range, and Zūm technologies.

• 802.11b, 802.11g, and 802.11n use the same Wi-Fi channel map. Eleven channels,

numbered 1–11, are used in the United States, and more channels can be used in

other countries. Each channel overlaps three channels on each side; for example, a

device communicating on channel 6 causes interference with any devices

communicating on channels 3, 4, 5, 7, 8, and 9. As a result, in this example, there

are only three available non-overlapping Wi-Fi channels: 1, 6,

and 11.

NOTE: 802.11a and 802.11ac use the 5 GHz band and have a different RF

channel mapping than that of 802.11b, 802.11g, and 802.11n. While 802.11a and

802.11ac do not have a line-of-sight transmission distance as good as that of

802.11g or 802.11n, 802.11a and 802.11ac often have much less interference. In a

poor RF environment, 802.11a and 802.11ac can provide a more robust solution

than 802.11g or 802.11n.

The 2.4 GHz Wireless Network illustration below shows the division of the 2.4 GHz band as

it relates to infiNET EX and Wi-Fi channels.

2.4 GHz Wireless Network

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