ZyXEL ZyWALL ATP700 User Guide - Page 212

Chapter 8 Wireless Table 82 Configuration > Object > AP Profile > Add/Edit Radio Profile (continued) LABEL DESCRIPTION 2.4 GHz Channel Selection Method This field is available when you set Channel Selection to DCS. Select auto to have the AP search for available channels automatically in the 2.4 GHz band. The available channels vary depending on what you select in the 2.4 GHz Channel Deployment field. Channel ID Select manual and specify the channels the AP uses in the 2.4 GHz band. This field is available only when you set Channel Selection to DCS and set 2.4 GHz Channel Selection Method to manual. 2.4 GHz Channel Deployment Select the check boxes of the channels that you want the AP to use. This field is available only when you set Channel Selection to DCS and set 2.4 GHz Channel Selection Method to auto. Select Three-Channel Deployment to limit channel switching to channels 1,6, and 11, the three channels that are sufficiently attenuated to have almost no impact on one another. In other words, this allows you to minimize channel interference by limiting channelhopping to these three "safe" channels. Time Interval DCS Time Interval Schedule Start Time Week Days Advanced Settings Guard Interval Select Four-Channel Deployment to limit channel switching to four channels. Depending on the country domain, if the only allowable channels are 1-11 then the Zyxel Device uses channels 1, 4, 7, 11 in this configuration; otherwise, the Zyxel Device uses channels 1, 5, 9, 13 in this configuration. Four channel deployment expands your pool of possible channels while keeping the channel interference to a minimum. Select this option to have the Zyxel Device survey the other APs within its broadcast radius at the end of the specified time interval. This field is available when you set Channel Selection to DCS. Enter a number of minutes. This regulates how often the AP surveys the other APs within its broadcast radius. If the channel on which it is currently broadcasting suddenly comes into use by another AP, the AP will then dynamically select the next available clean channel or a channel with lower interference. Select this option to have the Zyxel Device survey the other APs within its broadcast radius at a specific time on selected days of the week. Specify the time of the day (in 24-hour format) to have the Zyxel Device use DCS to automatically scan and find a less-used channel. Select each day of the week to have the Zyxel Device use DCS to automatically scan and find a less-used channel. This field is available only when the channel width is 20/40MHz or 20/40/80MHz. Set the guard interval for this radio profile to either Short or Long. Enable A-MPDU Aggregation A-MPDU Limit A-MPDU Subframe The guard interval is the gap introduced between data transmission from users in order to reduce interference. Reducing the interval increases data transfer rates but also increases interference. Increasing the interval reduces data transfer rates but also reduces interference. Select this to enable A-MPDU aggregation. Message Protocol Data Unit (MPDU) aggregation collects Ethernet frames along with their 802.11n headers and wraps them in a 802.11n MAC header. This method is useful for increasing bandwidth throughput in environments that are prone to high error rates. Enter the maximum frame size to be aggregated. Enter the maximum number of frames to be aggregated each time. ZyWALL ATP Series User's Guide 212