User's Guide Part 3

Access / One

Network

96 Managing the Network

– Auto

This is the default mode and will enable protection for 802.11g

stations if your Access/One Network finds an 802.11b client. In this

mode, if the 802.11b client leaves the network the protection mode

will revert to None automatically.

• Protection Rate

Sets the data rate at which the RTS-CTS (Request-to-Send and Clear-to-

Send) packets are sent (either 1 Mbps, 2 Mbps, 5.5 Mbps, or 11 Mbps).

The 11 Mbps data rate is the default.

• Protection Type

This option is only relevant when the Protection Mode is on. The options

here are CTS-only or RTS-CTS. With CTS-only, the client is not required

to send an RTS (Request-to-Send) to the AP. As long as the client receives

a CTS (Clear-to-Send) frame from the AP then the client is free to send

data. With the RTS-CTS option enabled, the client is required to send an

RTS to the AP and wait for a CTS from the AP before it can send data (this

option creates additional overhead and can cause performance

degradation). The default is CTS-only.

• Short Slot Time

802.11g defines the long slot time as 20 microseconds and a short slot

time as 9 microseconds. 802.11b only supports the long slot time of 20

microseconds. In an environment with 802.11g devices only, this option

(Short Slot Time) must be enabled for better performance—giving

precedence to 802.11g traffic. Only disable this option in mixed

(802.11b and 802.11g) environments. The default is enabled.

• Short Slot Preamble

Short slot preamble improves network efficiency by reducing the

preamble from 128 bits to 56 bits. 802.11g is required to support both

short and long preambles (802.11b support for a short preamble is

optional). If this option is enabled, any 802.11b clients associated with

the network must support a short preamble. The default for this option is

enabled.