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Downstream : The opposite of upstream. This means information coming down from the internet to your modem. Quite simply, this is a number that represents how much signal there is on the line versus noise.
Signal is what you want: encoded, understandable information from the internet. Noise is bad and can come from electromagnetic interference from other electronic devices and radio signals and thermal noise. Knowing what those two things are isn't too important right now. Just know that you want a better signal and less noise. Frequency : When you tune your radio or change your TV channel, you are telling the device to listen at a different frequency.
Channels are also used to send information destined for the internet over the cable Upstream And Downstream Problems Shortcuts Amazon network in pretty much the same way that TVs do. This is a piece of equipment operated by your ISP that manages all the cable modems and connects them to the internet.
From here, network engineers can check the health of your modem as well as reboot it remotely and push configuration changes to it.
FEC : Forward error correction. Data doesn't always transmit through cables perfectly, there are often some errors in the bits 1s and 0s. For instance, a 0 might be flipped to a 1 or vice versa. In order to correct those errors, some extra data has to be attached to every codeword that goes out a codeword is just a fixed chunk of data.
If it can fix the error, then everyone's happy. However, sometimes codewords have too many incorrect bits and the error correction algorithm called Reed-Solomon, if you're interested can't fix it. Find your modem's diagnostics page. Most modern modems do have such a feature to aid people with solving technical problems. For many modems, this is " For others, this may differ so contact your ISP or research it in the owners manual that came with your specific modem. Many Linksys modems listen at You'll need to enter that into your web browser's address bar.
If you're not sure, look up your modem's brand and model number followed by "diagnostics page" to find what address it should be located at. If your modem does not have a web page, you won't be able to Upstream And Downstream Problems Shortcuts Youtube follow this article � contact your ISP for help with diagnosing your connection if you're having issues. If you have more than one Internet connection, to get this local IP address, make sure that you are connected to that particular connection before typing in the address into your browser.
For only some issues, even if your modem is connected to your computer, you can still check your server settings despite the inability to check any other page. However, a more complicated setup may require a visit from a technician. Login to your modem. Login if your modem allows its users to connect to their own server settings page. These modems will have the login settings written in the book. For some Linksys modems especially wireless modems , you can stick pretty much anything in the username box even gibberish and place your current network password into the password box.
Check the status of each of the modem's stages. These are all important and if one does not match up with what you expect you may need to dig deeper to figure out why. This means your modem found the frequency with which to receive information from the internet. Configuration File : This should show the name of your configuration file. If not, just see if it says "OK" or similar. This file is downloaded from your ISP and tells the modem how it should behave.
Evaluate the power levels. These are classified into two types, upstream and downstream. You'll have some downstream channels and also Upstream Downstream Problems Not Found some upstream channels. Each one has separate power levels and SNR listed for it. Ideally, it should be as close to zero as possible.
As long as it's within these ranges, they should be okay. Too low means your signal is weak, and too high means the signal is strong - possibly too strong and will need to be corrected with an attenuator or splitter.
Upstream power levels should be between 40 - 50 dBmV. Think of this measurement as how loud your modem has to scream to be heard by the CMTS. If it's higher than about 50 dBmV, your cable modem may intermittently go offline or have a high number of uncorrectable codeword errors. One of the most common causes of upstream power problems is splitters. If possible, your cable modem for your internet should be on the first splitter attached to the line that comes in from your house.
Further splitters will degrade the signal quality � TVs can handle it, but you will see more noticeable problems with the internet. Check the SNR values. Typically, you will only see the downstream SNR value as it can be more accurately measured. With this value, the higher the better.
You want this number over 30, although you might not experience any problems 25 or above. There is no real maximum to this number, but it rarely goes higher than 40 dB on most installations because there is inevitably some noise in the line. Review the event log. A lot of the events in here are usually unimportant, however if you have been experiencing internet issues then some of them may be relevant.
Look for any thing with a status code of "Critical" or similar, and ignore those that say "Notice". Here are some examples of errors you might encounter. Alas no one's home or it can't hear them if they are. If so, call your ISP for help. Possible causes include too much noise, low signal, or a bad cable modem. Resetting the cable modem due to docsDevResetNow : Normally a reboot issued by your ISP, due to a firmware update, provisioning your modem, or other upstream maintenance.
It's not usually something to worry about. If it happens frequently, you should ask your ISP what's going on � there might be an outage in your area they're trying to fix. If in a river running at 2 km an hour, it takes him 40 minutes to row to a place and return back, how far off is the place? The man rows to a particular place and comes back.
You have to calculate the distance of this place. Let this distance be X. See the below diagram to understand clearly. Man starts from A, travels to B and comes back. Therefore, above equation becomes,. Also we have calculated downstream and upstream speeds at the start see values 1 and 2. In question, you can see that the man takes 40 minutes to travel to B and come back to A.
You have to convert this to hours and apply in above equation. We are converting from minutes to hours because we are using speed values in km per hour units. It takes him twice as long to row up as to row down the river. Find the rate of the stream.
Solution: Step 1: Calculate upstream and downstream speeds. Based on our assumptions, you can easily calculate upstream and downstream speeds as shown below. In this type, you have to form linear equations based on conditions given. You have to solve those equations to find the answer. Example Question 5: Kavin can row 10 km upstream and 20 km downstream in 6 hours. Also, he can row 20 km upstream and 15 km downstream in 9 hours. Find the rate of the current and the speed of the man in still water.
Solution: You have to make below assumptions to form equations. You already know the below equation. If you are not clear about this, refer to the equation in type 3.
Note: To solve such linear equations, there is another simple shortcut. Here is the video link to that shortcut. From the values of u and v, you can find the downstream and upstream speeds as shown below.
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