Advanced Wireless Settings

Here is a list of all advanced wireless settings

Afterburner

This should only be used with WRT54GS Models and only in conjunction with other Linksys "GS" wireless clients that also support Linksys "Speedbooster" technology.

AP Isolation

This isolates all wireless clients and wireless devices on your network from each other. Wireless devices will be able to communicate with the Gateway but not with each other in the network.

Authentication Type

Auto allows either Open System or Shared Key authentication to be used. For Open System authentication, the sender and the recipient do NOT use a WEP key for authentication. For Shared Key authentication, the sender and recipient use a WEP key for authentication. If you want to use only Shared Key authentication, then select Shared Key.

Basic Rate

Depending on the wireless mode you have selected, a default set of supported data rates will be selected. The default setting will ensure maximum compatibility with all devices. You may also choose to enable all data rates by selecting ALL. For compatibility with older Wireless-B devices, select 1-2Mbps.

Beacon Interval

The Beacon Interval value indicates the frequency interval of the beacon. A beacon is a packet broadcast by the router to synchronize the wireless network. 50 is recommended in poor reception.

CTS Protection Mode

When set to Auto, a protection mechanism will ensure that your Wireless-B devices will connect to the Wireless-G router when many Wireless-G devices are present. However, performance of your Wireless-G devices may be decreased.

Regulatory Mode

The country-specific regulatory domains also incorporate mechanisms for detecting other services that have priority use of the bands shared with wifi, such as aircraft radar. Using modes "d" or "h" causes compatibility problems with many wifi clients, notably Intel. It is normally set to "off".

Country / Region

Depending on what country the router is used in, regulations provide for the router to automatically set the transmit power and frequencies that may be used in that country. Tomato allows some of these parameters to be changed manually.

Bluetooth Coexistence

An 802.11 device and Bluetooth can interfere with each other when the 802.11 device operates on the 2.4 GHz band. All Bluetooth devices operate at the 2.4 GHz band. If you experience wireless disconnects, decreased range or speed, and other connectivity issues when you turn on some of your Bluetooth devices, try to change this option to "Enable" (this will make the router and Bluetooth device to take turns in using the spectrum for communication) or "Preemption" (the router will inform the Bluetooth device about the channel it is operating on, and the Bluetooth device can preemptively disable communication on the respective Bluetooth channels).

Please note that this option requires your Bluetooth device to "cooperate". If the Bluetooth device doesn't implement the coexistence techniques, using this option will have no effect. Experiments in late 2010 seemed to show that few devices support this feature.

Distance / ACK Timing

After a wireless transmitter has sent data to a client, it cannot transmit again unless it has waited long enough for the signal to get to that client, and back again. The setting is the number of metres from the router to the client x2. It is best left at the default setting unless a long range link is being attempted.

DTIM Interval

This indicates the interval of the Delivery Traffic Indication Message (DTIM). A DTIM field is a countdown field informing clients of the next window for listening to broadcast and multicast messages. When the router has buffered broadcast or multicast messages for associated clients, it sends the next DTIM with a DTIM Interval value. Its clients hear the beacons and awaken to receive the broadcast and multicast messages.

Fragmentation Threshold

Specifies the maximum size for a packet before data is fragmented into multiple packets. If you experience a high packet error rate, you may slightly increase the Fragmentation Threshold. Setting the Fragmentation Threshold too low may result in poor network performance. Only minor modifications of this value are recommended.

Frame Burst

Frame burst allows packet bursting which will increase overall network speed though this is only recommended for approx 1-3 wireless clients, Anymore clients and there can be a negative result and throughput will be affected.

Maximum Clients

You may specify the maximum number of clients allowed to connect to the router's wireless at one time. Too many clients can result in lower speeds per client.

Multicast Rate

Sets the transmission rate used for multicast broadcasts.

Preamble

If your wireless device supports the short preamble and you are having trouble getting it to communicate with other 802.11b devices, make sure that it is set to use the long preamble.

802.11n Preamble

Like 802.11g, 802.11n transmits a signal that can't be decoded by devices built to an earlier standard. However, 802.11n operating in "mixed" mode transmits a radio preamble and signal field that can be decoded by 802.11a and 802.11g radios. 802.11n Wi-Fi networks have an optional "greenfield" mode that improves efficiency by eliminating support for 802.11a/b/g devices.

RTS Threshold

Should you encounter inconsistent data flow, only minor modifications are recommended. If a network packet is smaller than the preset RTS threshold size, the RTS/CTS mechanism will not be enabled. The router sends Request to Send (RTS) frames to a particular receiving station and negotiates the sending of a data frame. After receiving an RTS, the wireless station responds with a Clear to Send (CTS) frame to acknowledge the right to begin transmission.

Receive Antenna

Transmit Antenna

These two settings are legacies from the WRT54 series. They allow the dedication of one or other antenna sockets to transmit and/or receive, useful if you intend to use directional, high gain antennas.

Transmit Power

A safe increase of up to 70 would be suitable for most users. Higher power settings are sometimes not recommended for users due to the possibility of increased noise and excess heat generated by the radio chipset (which can affect the life of the router). Depending on the model of the router, the actual level setting does not indicate the actual transmit power. Maximum power level on WRT series are around 250 depending on the driver used, but on the RT-N16 it is approximately 60.

Transmission Rate

The default setting is Auto. The range is from 1 to 54Mbps. The rate of data transmission should be set depending on the speed of your wireless network. You can select from a range of transmission speeds, or keep the default setting, Auto, to have the router automatically use the fastest possible data rate and enable the Auto-Fallback feature. Auto-Fallback will negotiate the best possible connection speed between the router and a wireless client.

Interference Mitigation

Sets the Wireless Interference Mitigation mode. Select "None" if you have no other electronic devices around that may cause an interference. Use "Non-WLAN" if the primary source of interference in your area are non-WLAN electronic devices, such as cordless phones, microwaves etc. "WLAN Manual" activates interference mitigation against other Wireless LAN APs. "WLAN Auto" is similar to "WLAN Manual", but it only activates mitigation if it actually can see other wireless APs transmitting at the time. It seems that the "WLAN Auto" selection works better in most cases, but you may try to disable the mitigation if you experience wireless stability issues. This "feature" has been responsible for much instability and poor throughput.

WMM

Wi-Fi Multimedia (WMM) is a Wi-Fi Alliance interoperability certification, based on the IEEE 802.11e standard. It provides basic Quality of service (QoS) features to IEEE 802.11 networks. WMM prioritizes wireless traffic according to four Access Categories (AC) - voice, video, best effort, and background. However, it does not provide guaranteed throughput. It is suitable for simple applications that require QoS, such as Voice over IP (VoIP) on Wi-Fi phones. Operation is limited to the local network, there is no implied QOS over the internet.

No ACK

In QoS mode, service class for frames to send can have two values: QosAck and QosNoAck. Frames with QosNoAck are not acknowledged. This avoids retransmission of highly time-critical data.

APSD Mode

Automatic Power Save Delivery is a more efficient power management method than legacy 802.11 Power Save Polling. Most newer 802.11 stations already support a power management mechanism similar to APSD. APSD is very useful for a VoIP phone, as data rates are roughly the same in both directions. Whenever Voice data are sent to the Access Point, the Access Point is triggered to send the buffered Voice data in the other direction. After that the Voice over IP phone enters doze state until next Voice data have to be sent to the Access Point.

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