Topcom 544 manual Skyr@cer Access Point 133

HL_Skyr@cerAP544.book Page 133 Wednesday, February 12, 2003 3:19 PM

DANSK

Authentication Type: The Authentication Type default is set to Open System, and you may want to set to Shared Key when the clients and AP in the same wireless network enable the WEP encryption. All the nodes and hosts on the network must use the same authentication type. It’s recommend that you use the default setting.

Preamble Type: Preamble is a sequence of bits transmitted at 1Mbps that allows the PHY circuitry to reach steady-state demodulation and synchronization of bit clock and frame start. Two different preambles and headers are defined: the mandatory supported Long Preamble and header, which interoperates with the 1 Mbit/s and 2 Mbit/s DSSS specification (as described in IEEE Std 802.11), and an optional Short Preamble and header (as described in IEEE Std 802.11b). At the receiver, the Preamble and header are processed to aid in demodulation and delivery of the PSDU. The Short Preamble and header may be used to minimize overhead and, thus, maximize the network data throughput. However, the Short Preamble is supported only from the IEEE 802.11b (High-Rate) standard and not from the original IEEE 802.11. That means that stations using Short-Preamble cannot communicate with stations implementing the original version of the protocol.

Basic Rate: The basic transfer rate is set depending on the speed of your wireless network. For example, you set 1-2 (Mbps) if you have older 802.11 compliant device in your network, which supports 1 ~ 2 Mbps data rate. This setting does not limit the basic transfer rates of the faster 802.11 compliant network devices.

Antenna Selection: To set the antenna for transmitting data. The default setting is Diversity Antenna, which is better for reception.

SSID Broadcast: While SSID Broadcast is enabled, all wireless clients will be able to communicate with the Access Point. For security purpose, you may want to disable SSID Broadcast to allow only those wireless clients with the AP’s SSID to communicate with the Access Point.

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