H3c-technologies H3C WA3600 Series Access Points Manual do Utilizador Página 190

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177
4. Expand Advanced Setup.
Figure 176 Radio setup (advanced setup)
5. Configure the radio as described in Table 68.
6. Click Apply.
Table 68 Configuration items
Item Descri
p
tion
Preamble
Preamble is a pattern of bits at the beginning of a frame so that the receiver
can sync up and be ready for the real data. There are two different kinds of
preambles:
Short preamble. A short preamble improves network performance.
Therefore, this option is always selected.
Long preamble. A long preamble ensures compatibility between access
point and some legacy client devices. Therefore, you can select this option
to make legacy client devices support short preamble.
802.11a/802.11n (5 GHz) does not support this configuration.
Transmit Distance Maximum transmission distance.
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