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Advanced settings

You can configure advanced settings for the 2.4 GHz wireless band. These settings are for experienced users. We only recommend changing the values on this page if you're familiar with these functions. Changing these settings can adversely affect the performance of your access point. The settings you can configure are as follows:

  • Contention slot: Sets the Wi-Fi Multimedia (WMM) contention window. The WMM contention window determines how long devices must wait and listen for other transmitting devices before they can transmit, also called a backoff period. Choose from the following options:

    • Short (default)
    • Long
  • Preamble type: The preamble type in 802.11-based wireless communications defines the Cyclic Redundancy Check (CRC) block length for communication between the access point and roaming wireless adapters. CRC can help reduce data transmission errors. Choose from the following options:

    • Short (default)
    • Long
  • Guard interval: A guard interval reduces signal loss by specifying a time to wait for signal reflections from previous transmissions to settle before transmitting a new signal. A shorter interval can improve performance. Choose from the following options:

    • Auto (default)
    • Normal GI (0.8 µs)
    • Double GI (1.6 µs)
    • Quadruple GI (3.2 µs)
  • 802.11g protection: Turns 802.11g protection on or off. This increases reliability but reduces bandwidth. Devices will send Request to Send (RTS) to the access point, which broadcasts Clear to Send (CTS) before the devices send a packet.

  • DTIM period: Delivery Traffic Indication Message (DTIM) alerts devices in power-saving mode that the access point has traffic for them so they can wake up to receive the traffic. Set a value between 1 (default) and 255. A higher value may improve the power consumption of wireless devices but may reduce wireless network performance.
  • RTS threshold: The RTS threshold of the wireless radio determines the frame size limit before devices must transfer RTS packets. A lower value may reduce wireless network performance. Set a value between 1 and 2347 (default).
  • Tx power: Set the power output of the wireless radio. You may not need 100% output power. Setting a lower power output may enhance security by reducing access to your signal.
  • Beacon interval: The Wi-Fi beacon is a repeating broadcast that informs devices of nearby wireless networks and access points. The beacon interval of the wireless radio determines how often, in milliseconds, the access point sends that broadcast. Set a value between 40 and 1000. The default is 100.
  • Station idle timeout: Sets how often, in seconds, the access point sends keepalive messages to wireless devices to check if they're still active.
  • Beamforming/MU-MIMO: Turns beamforming and MU-MIMO on or off. Beamforming focuses the wireless signal toward specific devices, rather than broadcasting uniformly in all directions. Multi-user, multiple input, multiple output (MU-MIMO) splits the available bandwidth into multiple steams that share the connection equally with multiple users simultaneously.
  • Airtime fairness: Airtime fairness helps prevent low-speed clients from taking up too much bandwidth by giving equal amounts of air time (instead of an equal number of frames) to each device regardless of its theoretical data rate. Choose from the following options:

    • Auto: The access point manages the share rate.
    • Static: Click Edit SSID rate to enter each SSID’s share rate manually. The total of all Shared rate fields must add up to 100.
    • Disable: Turn airtime fairness off.