ZyXEL Communications 100 manual Network Type, Points RTS Threshold

ZyAIR 100 Wireless PC Card

When moving your computer to another location within the network environment and it becomes out-of- range of the current Access Point, the roaming function will automatically connect your computer to another Access Point.

NOTE: Once the ESSID is set on the initial ZyAIR 100 and the rest of the clients are set to the default value of ANY, then the initial ZyAIR 100 with the ESSID must be started first.

Network Type

To connect your wireless station to a local network infrastructure, set the station operation mode to Infrastructure (with Access Point as default setting). In case you do not wish to connect to a network infrastructure, but prefer to set up a small wireless workgroup, you can enable the Ad-hoc (without Access Point) tick box. Be aware that when the Ad-hoc mode is selected, be sure to set your wireless stations with the same channel.

NOTE: ZyAIR 100 works with any IEEE 802.11 and 802.11(b)-compliant Access

Points.

RTS Threshold

The RTS Threshold prevents the Hidden Node problem. Hidden Node is a situation in which two stations are within range of the same Access Point, but are not within range of each other. The following figure illustrates an example of the Hidden Node problem. Both stations (STA) are within range of the Access Point, however, they cannot hear each other. Therefore, they are considered hidden nodes from each other. When a station starts data transmission with the Access Point, it might not notice that the other station is already using the wireless medium. When these two stations send data at the same time, they might collide when arriving simultaneously at the Access Point. The collision will most certainly result in a loss of messages for both stations.

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