Change Ip Ad In Wiki When Cannot Login Troubleshoot the SNR and Attenuation of Your DSL Modem to Fix Your Broadband Internet Speed

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Troubleshoot the SNR and Attenuation of Your DSL Modem to Fix Your Broadband Internet Speed

DSL Internet connections can experience problems for a variety of reasons. The information is related to the user’s connection. And more can be determined through a simple check of Sync speed, attenuation and Signal-to-noise ratio (SNR) statistics on a DSL modem. This article will explain why these parameters are important, how to monitor them and how to customize them.

It is always a good idea to test for packet loss on any network before any maintenance work begins. A packet loss test should confirm that there is a problem with the user’s connection and that the Internet Service Providers (ISPs) network is not the source of the problem. Additionally, packet loss testing will provide baseline statistics to compare future results against.

Assuming that the packet loss test has revealed a problem with the user’s IP address, it’s time to check the DSL modem and troubleshoot it:

Signal-to-Noise Ration

According to Wikipedia.org, “signal-to-noise ratio (SNR) is a measure used in science and engineering to determine how much of a signal is contaminated by noise. signal. A ratio greater than 1:1 indicates more signal than noise.”

An everyday example of SNR is listening to music in your car over traffic noise or other people talking. The louder the radio is compared to other car noises, the better you can hear the music. The same is true for a DSL modem “hearing” a signal to drive Internet traffic. The higher the signal-to-noise ratio, the faster the Internet connection and the less packet loss. When information is less clear compared to noise, speed decreases causing latency. Packets can be lost or discarded, making retransmission of data packets a problem with real-time applications such as Voice over Internet Protocol (VoIP) used by Vonage, Skype and other PBX providers. In fact, any real-time app will struggle to include videos from Netflix, Blockbuster and others or any type of online game.

DSL Parameter Values

The parameters to look for in a DSL modem are Sync, Attenuation and Signal-to-Noise Ratio.

Synchronization is defined downstream and upstream and is the speed of connection in each direction. The stream goes from the ISP to the modem. Upstream is from the modem to the ISP.

Reduction and loss of signal on land. The db loss is not dependent on distance. It also depends on the type of cable and the gauge (which can vary with the length of the cable), the number and location of other connection points on the cable. Attenuation is recorded by the lower and upper channels.

20db and below = Excellent

20db-30db = Very good

30db-40db = Very Good

40db-50db = Good

50db-60db = Poor and may experience connectivity issues

60db and above = Bad and will experience connectivity issues

Like Sync and Attenuation, SNR has low and high values.

6db or below = Bad and won’t have line sync and frequency dropout 7db-10db = Good but doesn’t leave much room for adjustment.

11db-20db = Good with little or no interference

20db-28db = Very good

29db or higher = Excellent

SNR is sometimes expressed in margin or SNRM. This is the difference between the current SNR value and the SNR that is required to create a reliable circuit at the communication speed. If the SNRM is low, the circuit may suffer from intermediate and low-level errors. Larger currents are required to avoid bursting interference so as not to damage the connection. The target SNRM is usually 6db but can be as high as 12db.

Determining the Characteristics of a DSL Modem

Many DSL modem replacement sites can be found at the internal address of 192.168.1.254. Look at http://broadband.modemhelp.net/dsl_modem_info/index.shtml and look up the specific specifications of your DSL modem or the manufacturer’s manual. The manufacturer’s website or manual will provide the address for the modem’s configuration page. Just plug the address into the browser of the PC connected to the modem and the page should load. Remember that these values ​​can change. If intermediate problems are encountered, the values ​​should be checked if everything is fine and compared to what happens in the event of a problem.

Changing DSL Modem Settings

Cabling and connectors are the main cause of DSL problems. Internal wiring can be easily eliminated by simply plugging the modem into the Network Interface Device (NID) and unplugging everything else. The NID is usually located outside the home or in a business equipment room. If the values ​​do not improve to an acceptable level then the problem is with the modem or the ISPs. Here are some things to try and check:

1. Reset the modem.

2. Check with the ISP to make sure there are no load-bearing sprays or bends in their cabinets.

3. Check with the ISP to make sure there are no T1 circuits installed on the cable that supports DSL (which may not work at home).

4. If the problem seems to be related to the weather especially in the rain, ask the ISP to check and bypass the weather-worn cabling or find better pairings.

5. If none of the above is successful, ask the ISP to change the ports on the DSLAM.

If plugging the modem into the NID improved the conditions, then the problem is in the internal wiring. Check out the following:

1. Calling from NID to modem is fine without any cables.

2. All telephone equipment passes through the DSL filter.

3. The telephone jacks are in good condition and the connections behind the wall plates are firmly connected.

4. If the modem is plugged into a DSL filter, replace the filter.

5. If none of the above works, unplug all phone accessories except the modem and check the contents. If the results are acceptable, start plugging other phone devices back into the wall at the same time. Check if any device is plugged into the jack. When the modem values ​​change back to the default value, the culprit has been found.

Most of the time, the problem is solved by one of the things above. If the ISP is affected, persistence may be required until a technician is available with the knowledge or customer care to correct the problem. Remember, almost all online problems can be solved with determination and hard work.

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