![]() ![]() ![]() The easiest way to adjust your target SNR margin is to upgrade to a modem equipped with this feature. We have documented a number of ways in which you may be able to reduce your downlink target SNR margin to substantially increase your speeds. You pay a high price in terms of broadband connection speed if the target SNR margin is increased by BT’s Digital Line Management from its default 6 dB setting. We hope that you have gathered from this page that the downlink target SNR margin is a very important factor in determining your downlink connection speed. It could make a big difference to broadband speeds We find the RouterStats software is relatively complicated to use, but if you have the time to search the Internet for support information, then it may provide a cost-effective way to change the target SNR margin. They point out that all routers are different and users may need to do some detective work to get RouterStats working with a particular modem. On the RouterStats website, the developers warn that the RouterStats software is not ‘plug and play’. RouterStats can be configured to work with a broad range of modems, including: In addition, RouterStats can be used to adjust the target SNR margin in some modems. For example, you can monitor (over time) the actual SNR margin and the number of errors experienced on your line, which can help to diagnose problems. RouterStats is powerful free software (which runs with Windows or Linux) that connects to your modem to provide a comprehensive range of statistics and graphs. RouterStats allows you to monitor your connection stats and adjust the target SNR margin with a supported modem This means that if BT has increased your target SNR margin to 15 dB, for example, you will only be able to decrease this to about 9.5 dB. Please note that the target SNR margin adjustment using the DGTeam firmware is limited to about -5.5 dB in the downward direction. ![]() We still, however, find that broadband connections made with our favourite Billion modems are generally more robust than with Netgear modems – with or without the DGTeam firmware. We have regularly used the DGTeam firmware over a number years, and have found it very reliable and easy to use. The firmware is free of charge to download, and versions are available for the following models: This firmware allows the downlink target SNR margin to be adjusted (which cannot be done using the standard Netgear firmware). You will no longer be a slave to Digital Line Management in your exchange!ĭGTeam has develop custom firmware with SNR margin adjustmentĭGTeam provides unofficial custom firmware developed for selected Netgear modems. We will show you how to adjust your target SNR margin to any value that you desire. In the worst case scenario, you may be saddled with very slow downlink speeds caused by an 18 dB target SNR margin when your line could work perfectly with a 3 dB (or less) SNR margin. Once the BT exchange equipment has increased the target SNR margin, it can take days for the target SNR margin to be reduced and, in some cases, it is never reduced. a faulty broadband microfilter, or forgetting to install a microfilter on all extension phone sockets.regularly switching your modem on and off.from Christmas lights or faulty electrical equipment) a poor or faulty modem (see our broadband router/modem page for information on the best modems).not using a filtered faceplate (see our ADSL faceplate page for more information).Many things can cause the exchange equipment to increase the target SNR margin, including: This action – aimed at stabilising the line – reduces the connection speed.īT’s DLM system, or BT’s manual intervention, can increase the target SNR margin to a maximum value of 18 dB. ![]() If the line experiences any issues (such as bursts of errors at a particular time), the exchange equipment can increase the target SNR margin – usually in steps of 3 dB. The corresponding target margin for TalkTalk equipment is 9 dB.Īs part of the Digital Line Management process, the exchange equipment continuously monitors your broadband connection, for example recording the number of times that it drops and the number of errors it suffers. On a good line, BT generally considers that a 6 dB SNR margin is appropriate to maintain a connection without a significant number of drops or errors. When your broadband service is first switched on, the target SNR margin is set by the BT exchange equipment at 6 dB. BT can increase your downlink target SNR margin to 18 dB ![]()
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