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ZyAIR B-500 Wireless Access Point User’s Guide
Wireless Configuration and Roaming 5-5
If the Fragmentation Threshold value is smaller than the RTS/CTS value (see previously) you set then the
RTS (Request To Send)/CTS (Clear to Send) handshake will never occur as data frames will be fragmented
before they reach RTS/CTS size.
5.3 Preamble Type
A preamble is used to synchronize the transmission timing in your wireless network. There are two preamble
modes: long and short.
Short preamble takes less time to process and minimizes overhead, so it should be used in a good wireless
network environment when all wireless clients support it.
Select Long if you have a ‘noisy’ network or are unsure of what preamble mode your wireless clients support
as all IEEE 802.11b compliant wireless adapters must support long preamble. However, not all wireless
adapters support short preamble. Use long preamble if you are unsure what preamble mode the wireless
adapters support, to ensure interpretability between the ZyAIR and the wireless stations and to provide more
reliable communication in ‘noisy’ networks.
Select Dynamic to have the ZyAIR automatically use short preamble when all wireless clients support it,
otherwise the ZyAIR uses long preamble.
The ZyAIR and the wireless stations MUST use the same preamble mode in order
to communicate.
5.4 Configuring Wireless
Click the WIRELESS link under ADVANCED to display the Wireless screen.