What is good ADSL line attenuation?
What is good ADSL line attenuation?
The higher the value of this parameter, the lower the line quality and, therefore, the lower the data transfer/receipt speed. Optimal values should be between 5 and 30 dB (excellent or good line). An attenuation value of 45 dB or higher means that the line is not suitable for ADSL.
What is the attenuation limit for an ADSL loop?
When we refer to signal attenuation, we consider a value of 5 dB to 30 dB to be optimal, and above 45 dB to be unacceptable for ADSL use.
What should SNR and attenuation be?
Typical values are: 10dB and lower is bad. 11db – 20dB is OK. 20dB – 28dB is excellent.
How do I reduce attenuation on ADSL line?
How to Reduce Line Attenuation For DSL
- Change the network and connection cables running from your cable to your modem.
- Switch the cables running from your modem to the main source of power in the building you are in.
- Check that the phone line is connected to a DSL/POT splitter before entering the phone jack.
What is the normal SNR margin?
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.
What is loop attenuation?
Loop Attenuation is a measure of the quality of the line from the point of view of how much the signal is impeded. The longer a line, the higher the attenuation will be (hence the ‘quieter’ the signal).
What is a good DSL SNR?
The higher the SNR, the better. Twenty-nine and above is considered outstanding and as this number drops, the likelihood of sync problems increases. Anything at or below 6 dB is considered bad. Now, once you know your measured SNR and the minimum required to sync, the calculation of DSL margin is simple.
How can I improve my SNR ADSL?
Luckily, there are some things you can do to improve the SNR margin:
- Replace your router with a better one.
- Install a good quality ADSL / VDSL filter to your router.
- Try to change Internet provider, as some providers are less crowded than others.
- Check cabling patching.
- Change the in-building cabling.
What is normal SNR margin?
How can SNR and line attenuation be improved?
How do you fix SNR problems?
Fixing SNR Issues
- Remove Extra WiFi networks. This is especially true if this is a business environment.
- Check for “Noisy” devices. Take a look at the devices around the WiFi router.
- Turn off unneeded signals. Some routers support multiple bands in the 2.4 GHz and 5 GHz range.
What causes SNR margin drop?
Florescent light sources, telephone devices installed on your phone line, your mom’s cake-blender, all these may decrease the SNR margin. Luckily, there are some things you can do to improve the SNR margin: Replace your router with a better one. Install a good quality ADSL / VDSL filter to your router.
How do you fix a SNR problem?
How can I improve my SNR margin?
What causes SNR issues?
Usually this is caused by bad shielding, R59 cabling, or bad connectors/wall plates. It’s not easy to determine the location of interference. Downstream interference means that you are getting a lot of noise around the frequency that your cable modem runs at.
What is a high line attenuation?
Line attenuation (loss) is a measure of how much the signal has degraded between the DSLAM and the modem. This is largely a function of the distance from the exchange. The lower the dB, the better for this measurement.
