ithut (.) net

Howtos and Tutorials from behind the firewall

  • Home
  • Android
    • Root Your Phone
    • Android News
  • Urdu Tutorials
  • Top Tutorials
  • Forum
  • Policies
    • Copyright Policy
    • Comment Policy
  • Contact us
Twitter Youtube RSS

SNR Margin and Line Attenuation – What do they mean?

Posted on July 31, 2011 by Muhamamd Zeeshan
38 commentsLeave a comment

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+
Categories: internet | Tags: cisco, internet, line attenuation, snr margin
Notice: This work is licensed under a BY-NC-SA. Permalink: SNR Margin and Line Attenuation – What do they mean?
The Purpose of the Configuration Register

38 Responses to “SNR Margin and Line Attenuation – What do they mean?”

  1. Katty says:
    August 20, 2011 at 4:19 pm

    God, I feel like I souhld be takin notes! Great work

    Reply
    • Karson says:
      October 26, 2011 at 5:16 pm

      Your answer was just what I ndeeed. It’s made my day!

      Reply
  2. iphone 5 prototype says:
    November 7, 2011 at 9:57 am

    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

    Reply
  3. Breanne Kwak says:
    November 22, 2011 at 1:54 am

    Aloha dude! I really like what you’re posting here. Keep going that way.

    Reply
  4. Daina Thibert says:
    November 30, 2011 at 5:20 am

    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.

    Reply
  5. Kyra Jose says:
    December 9, 2011 at 11:46 am

    I like this website because so much useful stuff on here.

    Reply
  6. coupon for shoebuy says:
    December 12, 2011 at 1:39 pm

    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 🙂

    Reply
  7. Sean Calta says:
    December 12, 2011 at 3:24 pm

    Some genuinely prime posts on this website , saved to favorites .

    Reply
  8. maxi summer dresses 2010 says:
    December 12, 2011 at 4:58 pm

    I’m having a small problem. I cannot subscribe to your rss feed for some reason. I’m using google reader by the way.

    Reply
  9. pozycjonowanie stron internetowych says:
    December 12, 2011 at 6:35 pm

    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.

    Reply
  10. offer code says:
    December 12, 2011 at 7:00 pm

    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.

    Reply
  11. free bet says:
    December 12, 2011 at 7:33 pm

    I like this web blog very much so much fantastic info.

    Reply
  12. singapore says:
    December 12, 2011 at 7:37 pm

    I really enjoy looking through on this website , it has good blog posts.

    Reply
  13. Offer Code says:
    December 12, 2011 at 8:13 pm

    I gotta bookmark this site it seems very useful very helpful

    Reply
  14. Jolene says:
    December 12, 2011 at 8:59 pm

    Lovely blog! I am loving it!! Will be back later to read some more. I am bookmarking your feeds also

    Reply
  15. bonus says:
    December 12, 2011 at 9:25 pm

    Absolutely composed content material , regards for selective information .

    Reply
  16. shoebuy 25 off coupon says:
    December 13, 2011 at 2:13 am

    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.

    Reply
  17. Odloty says:
    December 13, 2011 at 9:18 am

    I conceive you have mentioned some very interesting points , thanks for the post.

    Reply
  18. Click Here says:
    December 13, 2011 at 3:45 pm

    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 🙂

    Reply
  19. Alissa Klumph says:
    December 13, 2011 at 4:52 pm

    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.

    Reply
  20. pozycjonowanie Gliwice says:
    December 13, 2011 at 6:50 pm

    I like reading and I think this website got some genuinely utilitarian stuff on it! .

    Reply
  21. casino says:
    December 14, 2011 at 5:57 am

    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.

    Reply
  22. Jaime Marcum says:
    December 17, 2011 at 6:09 pm

    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.

    Reply
    • Zeal says:
      January 11, 2012 at 1:27 pm

      Thanks for contributing. It’s helped me undetrnsad the issues.

      Reply
  23. ÿþw says:
    January 9, 2012 at 12:28 pm

    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!

    Reply
  24. divot tool ball marker says:
    January 11, 2012 at 11:10 am

    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.

    Reply
  25. Montane9318 says:
    January 15, 2012 at 8:01 pm

    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.

    Reply
  26. Hordyk says:
    January 16, 2012 at 7:22 am

    I just added this feed to my bookmarks. I have to say, I really enjoy reading your blogs. Keep it up!

    Reply
  27. montres says:
    January 16, 2012 at 12:41 pm

    I always was interested in this topic and stock still am, thanks for posting.

    Reply
  28. Darin Grebel says:
    January 22, 2012 at 11:20 am

    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

    Reply
  29. divot tool ball marker says:
    February 15, 2012 at 2:33 am

    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.

    Reply
  30. duşakabin says:
    March 16, 2012 at 4:01 pm

    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.

    Reply
  31. Franke says:
    March 18, 2012 at 3:01 pm

    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.

    Reply
  32. Get More Information says:
    April 20, 2012 at 9:36 pm

    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!

    Reply
  33. prochaksa says:
    April 21, 2012 at 9:22 pm

    Some truly wonderful posts on this website , appreciate it for contribution.

    Reply
  34. Robbie Aguiar says:
    August 1, 2012 at 2:44 pm

    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.

    Reply
  35. Don Robateau says:
    August 9, 2012 at 2:57 pm

    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.

    Reply
  36. windowsareawesome: Awesome Windows says:
    August 15, 2012 at 10:25 pm

    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.

    Reply

Leave a Reply Cancel reply

Your email address will not be published. Required fields are marked *


question razz sad evil exclaim smile redface biggrin surprised eek confused cool lol mad twisted rolleyes wink idea arrow neutral cry mrgreen

*

*

  • Recent Posts

    • Samsung Galaxy S7 rumor roundup: price, release date, features, specs
    • How to Root any LG Mobile
    • How To Record Ptcl Smart TV(iPtv) channels on PC
    • How to change the interface metric from GUI?
    • What’s the recommended way to enable / disable services in Ubuntu?
  • Categories

    • Android
    • Android_News
    • Android_Root
    • CCNA urdu
    • Cisco
    • internet
    • iptv
    • ipv6
    • Linux
    • Networking
    • Oracle
    • perl
    • PHP
    • Proxy
    • ptcl smarttv
    • Ubuntu
    • unblock
    • Uncategorized
    • urdu_tutorials
    • Windows
  • Tags

    bad username password ccna centos cisco command line configuration register cpan cron job cron tab dbd facebook get ipv6 free internet iptv ipv6 iso image ithut.net line attenuation Linux Linux Laptop mode mount iso networking oracle perl php proxy ptcl ptcl smart tv rhel sendmail smarttv snr margin squid Tutorials ubuntu unblock facebook unblock youtube urdu Urdu Tutorials utdu windows windows 7 windows xp youtube zee.im
zee.im ithut.net