There have been many posts regarding SNR and Line Attenuation.
SNR
SNR means Signal to Noise Ratio. Simply put divide the Signal value by Noise Value and you get SNR. You need high SNR for a stable connection. In general, a higher signal to noise ratio will result in less errors.
- 6bB. or below = Bad and will experience no line synchronisation and frequent disconnections
- 7dB-10dB. = Fair but does not leave much room for variances in conditions.
- 11dB-20dB. = Good with little or no disconnection problems
- 20dB-28dB. = Excellent
- 29dB. or above = Outstanding
Note that most modems display value as SNR Margin and not pure SNR.
SNR Margin
You can think of SNR margin as the measure of quality of the service; it defines the ability of the service to work error free during noise bursts.
This is a measure of the difference between your current SNR and the SNR that is required to keep a reliable service at your connection speed. If your SNR is very close to the minimum required SNR, you are more likely to suffer intermittent connection faults, or slowdowns. You need a high margin to ensure that bursts of interference don’t cause constant disconnections.
With traditional broadband, the higher the SNR Margin, the better. With MaxDSL the faster speeds are only available as a trade-off with what your line can reliably support. The Target SNR Margin is about 6dB. If your broadband is provided through an LLU (Local Loop Unbundled) network, this target SNR Margin may be as high as 12dB.
Line Attenuation
In gerneral, attenuation is the loss of signal over distance. Unfortunately, dB loss is not just dependent on distance. It also depends on cable type and gauge (which can differ over the length of the cable), the number and location other connection points on the cable.
- 20bB. and below = Outstanding
- 20dB-30dB. = Excellent
- 30dB-40dB. = Very Good
- 40dB-50dB. = Good
- 50dB-60dB. = Poor and may experience connectivity issues
- 60dB. and above = Bad and will experience connectivity issues
Line attenuation also affects your speed.
- 75 dB+: Out of range for broadband
- 60-75 dB: max speed up to 512kbps
- 43-60dB: max speed up to 1Mbps
- 0-42dB: speed up to 2Mbps+
God, I feel like I souhld be takin notes! Great work
Your answer was just what I ndeeed. It’s made my day!
I really like your weblog.. really great colours & theme. Did you create this internet site yourself? Plz reply back again as I’m looking to create my own website and would like to know wheere u acquired this from. many thanks
Aloha dude! I really like what you’re posting here. Keep going that way.
I and my friends ended up checking the great helpful hints found on your site then quickly developed an awful feeling I had not expressed respect to the site owner for those tips. Most of the young boys ended up for this reason excited to learn them and have now truly been taking pleasure in them. Appreciation for getting well accommodating and for going for such very good subject areas millions of individuals are really needing to discover. My personal sincere apologies for not saying thanks to sooner.
I like this website because so much useful stuff on here.
This is absolutely gold. I was not expecting that I’d get so much out of reading your write up! You’ve just got yourself a returning visitor 🙂
Some genuinely prime posts on this website , saved to favorites .
I’m having a small problem. I cannot subscribe to your rss feed for some reason. I’m using google reader by the way.
I actually still can’t quite believe that I could always be one of those reading the important suggestions found on this blog. My family and I are seriously thankful on your generosity and for presenting me the opportunity to pursue my chosen profession path. Thanks for the important information I acquired from your web site.
It’s actually a nice and helpful piece of info. I’m happy that you just shared this helpful information with us. Please keep us informed like this. Thanks for sharing.
I like this web blog very much so much fantastic info.
I really enjoy looking through on this website , it has good blog posts.
I gotta bookmark this site it seems very useful very helpful
Lovely blog! I am loving it!! Will be back later to read some more. I am bookmarking your feeds also
Absolutely composed content material , regards for selective information .
Thanks a ton for being my tutor on this subject. My spouse and i enjoyed your article quite definitely and most of all enjoyed the way in which you handled the aspect I regarded as being controversial. You happen to be always really kind to readers much like me and help me in my life. Thank you.
I conceive you have mentioned some very interesting points , thanks for the post.
This is just what I was looking for. I did not expect that I’d get so much out of reading your write up! You’ve just got yourself a returning visitor 🙂
We are a gaggle of volunteers and starting a brand new scheme in our community. Your web site offered us with valuable info to work on. You’ve performed a formidable process and our entire community might be thankful to you.
I like reading and I think this website got some genuinely utilitarian stuff on it! .
I’m honored to receive a call from a friend as he identified the important ideas shared on your site. Looking at your blog posting is a real excellent experience. Thank you for taking into consideration readers like me, and I want for you the best of success like a professional domain.
I have to express some thanks to you for bailing me out of such a problem. As a result of researching through the world-wide-web and obtaining notions which are not productive, I figured my life was over. Existing devoid of the answers to the difficulties you have fixed by means of this blog post is a critical case, as well as those which might have badly damaged my career if I had not noticed your website. Your personal natural talent and kindness in dealing with all the things was vital. I don’t know what I would have done if I had not encountered such a thing like this. I can at this moment look ahead to my future. Thanks for your time so much for this high quality and sensible guide. I will not think twice to endorse your web sites to anybody who needs to have counselling on this subject matter.
Thanks for contributing. It’s helped me undetrnsad the issues.
Its rare for me to discover something on the net that is as entertaining and fascinating as what youve got here. Your page is sweet, your graphics are outstanding, and whats more, you use reference that are relevant to what youre talking about. You are definitely one in a million, keep up the good work!
Enjoyed examining this, very good stuff, regards . “It is well to remember that the entire universe, with one trifling exception, is composed of others.” by John Andrew Holmes.
You made some good points there. I looked on the internet for the subject matter and found most individuals will go along with with your blog.
I just added this feed to my bookmarks. I have to say, I really enjoy reading your blogs. Keep it up!
I always was interested in this topic and stock still am, thanks for posting.
Nice weblog right here! Also your website quite a bit up very fast! What web host are you using? Can I am getting your associate hyperlink for your host? I want my site loaded up as fast as yours lol
I really enjoy looking at on this website, it holds excellent blog posts. “Beware lest in your anxiety to avoid war you obtain a master.” by Demosthenes.
I just couldn’t go away your website before suggesting that I really loved the usual information a person supply on your visitors? Is going to be back continuously to check out new posts.
Hi, Neat post. There is a problem along with your site in internet explorer, would check this? IE still is the marketplace leader and a large part of people will miss your great writing because of this problem.
Nice read. I just passed this onto a colleague who was doing a little research on that. He actually bought me lunch as I found it for him! Thus let me rephrase: Thanx for lunch!
Some truly wonderful posts on this website , appreciate it for contribution.
Thanks for sharing superb information. Your website is very cool. I’m impressed by the info that you have on this site. It reveals how nicely you understand this subject. Bookmarked this website page, will come back for more articles.
Thanks for a very interesting site. Where else may I get that kind of info written in such an ideal manner? I have a project that I’m just now running on, and I have been at the look out for such information.
Hiya, I’m really glad I have found this info. Today bloggers publish only about gossip and internet stuff and this is actually irritating. A good site with interesting content, this is what I need. Thanks for making this web-site, and I will be visiting again. Do you do newsletters? I Can’t find it.