How is ADSL speed calculated?
Attenuation is calculated differently for ADSL and ADSL2, it is common to see a 3-4 db increase when moving from ADSL1 to ADSL2+….
| DSL Maximum Speed Calculator | |
|---|---|
| Cable loss | dB/km (default=13.81) |
| Approximate Distance | meters |
| ADSL Max Speed | kbps |
| ADSL2+ Max Speed | kbps |
What is good DSL attenuation?
Signal attenuation — shows the signal attenuation in the line at the moment of modem synchronization with the DSLAM (this parameter should be less than 45 dB). 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 max speed for ADSL?
While ISPs often advertise ADSL2+ and ADSL services as having maximum downlink connection speeds of 24 Mbps and 8 Mbps, respectively, very few broadband users can expect to achieve such speeds.
What is a good attenuation?
Unluckily, you can do nothing about a low attenuation figure, except from moving to a new location closer to the ADSL / VDSL exchange….Slow internet speed and distance.
| Attenuation | Performance |
|---|---|
| 20dB – 30dB | Excellent |
| 30dB – 40dB | Very good |
| 40dB – 50db | OK |
| >50dB | Bad |
What is good line attenuation for VDSL?
Optimal values should be between 5 dB and 30 dB (for excellent and good line). An attenuation value of 45 dB and above means that the line is not suitable for VDSL to use.
What is line attenuation dB?
In general, the longer the total cable length between your modem and the BT exchange, the greater the so-called line loss (also known as line attenuation). This is measured in dB. Most modems can display the measured line loss.
What is downstream line attenuation dB?
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.
How do you reduce line attenuation?
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.
- Find the phone jack where your modem connects to the phone line in your building.
How many kms is 25 Mbps?
Mbps to kB/s Conversion Table
| Megabit per second | Kilobyte per second |
|---|---|
| 25 Mbps | 3125 kB/s |
| 26 Mbps | 3250 kB/s |
| 27 Mbps | 3375 kB/s |
| 28 Mbps | 3500 kB/s |
How do you increase line attenuation?
How can I boost my ADSL signal?
Here are some more than achievable tips you can do that will help improve and isolate overall internet ADSL performance speed issues within your home.
- Hardwire yourself to your ADSL2+ modem router.
- Perform a Speed Test Using Online Speed Test Websites.
- Check Modem Connections & Phone Socket Wiring.