Chapter 7 Wireless
7.9.7 Preamble Type
Preamble is used to signal that data is coming to the receiver. Short and long refer to the length of the synchronization field in a packet.
Short preamble increases performance as less time sending preamble means more time for sending data. All IEEE 802.11 compliant wireless adapters support long preamble, but not all support short preamble.
Use long preamble if you are unsure what preamble mode other wireless devices on the network support, and to provide more reliable communications in busy wireless networks.
Use short preamble if you are sure all wireless devices on the network support it, and to provide more efficient communications.
Use the dynamic setting to automatically use short preamble when all wireless devices on the network support it, otherwise the ZyXEL Device uses long preamble.
Note: The wireless devices MUST use the same preamble mode in order to communicate.
7.9.8 Wireless Distribution System (WDS)
The ZyXEL Device can act as a wireless network bridge and establish WDS (Wireless Distribution System) links with other APs. You need to know the MAC addresses of the APs you want to link to. Once the security settings of peer sides match one another, the connection between devices is made.
At the time of writing, WDS security is compatible with other ZyXEL access points only. Refer to your other access point’s documentation for details.
The following figure illustrates how WDS link works between APs. Notebook computer A is a wireless client connecting to access point AP 1. AP 1 has no wired Internet connection, but it can establish a WDS link with access point AP 2, which has a wired Internet connection. When AP 1 has a WDS link with AP 2, the notebook computer can access the Internet through AP 2.
Figure 38 WDS Link Example
WDS
A
AP 1 | AP 2 |
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