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tschmidt
Premium,MVM
join:2000-11-12
Milford, NH
kudos:9
Reviews:
·G4 Communications
·Fairpoint Commun..
·Hollis Hosting
reply to sreilly24590

Re: Need to reboot the DSL Modem to get my rated speeds

You need to step back and identify the root cause of the change.

How are you determining speed is degrading? DNS does not affect speed directly however a typical web site is often composed of many components each requiring its own DNS translation so slow DNS may affect perceived speed, but not a speed benchmark.

First step is to log into the modem and check sync speed and margin. Copper phone circuits are susceptible to noise and other interference. DSL is designed to adjust speed automatically when line degrades. Both should remain pretty stable over time. Margin may change by a dB or so but ideally sync speed does not. If your line is marginal modem and DSLAM will adjust speed to reflect line characteristics. When you reboot the modem it goes through a lengthy training period to determine line conditions. Ideally modem/DSLAM should automatically adjust speed up and down but this does not always happen, it is easier to adjust speed down when line degrades then up as it gets better.

Next perform speed test to stable sites like this one. There is a speed test on the tools page and I like to use speedtest.net.
If modem stats are stable but speed test varies it is most likely congestion within your ISPs network or that one or more PCs on you LAN is using the Internet affecting speed test. Lots of software is pretty chatty these days calling the mothership.

Speed test result should be stable based on modem sync rate. If you think there is a congestion problem try running traceroute (tracert in Windows) to stable sites like this one. Latency should slowly increase with distance and hop count. Sudden unexplained increase typically indicates congestion at that or the previous hop.

If you think you have a DNS problem might want to run GRC DNS benchmark:
»www.grc.com/dns/benchmark.htm

I'm not a fan of using 3rd party DNS. If your ISP has an arrangement with a content distribution network (CDN) provider using other then their DNS resolver can degrade performer because it is not aware of these special connections.

/tom



mooch
No Booing Allowed

join:2001-11-11
Dublin, OH
Reviews:
·Embarq Now Centu..

Not sure he'll find an issue with his equipment or the wiring in his house.

As indicated above, after I tried 3 different modems to fix this same issue, it turned out that was all in vain due to the problem suddenly going away when CL fixed another issue with my line.

Whatever CL did, it fixed two issues at the same time...night time dial up speeds and a sync rate that would drop but not recover unless I disconnected the modem.


sreilly24590
Premium
join:2002-10-27
Scottsville, VA
Reviews:
·HughesNet Satell..
reply to tschmidt

When I see the downloads slowing I usually run the dslreports speedtests. I'll run several times and look for an average.

I've looked through the various menus and setting for the modem and see nothing relating to sync speed or margin. A hint here might be useful.



mooch
No Booing Allowed

join:2001-11-11
Dublin, OH
Reviews:
·Embarq Now Centu..

said by sreilly24590:

When I see the downloads slowing I usually run the dslreports speedtests. I'll run several times and look for an average.

I've looked through the various menus and setting for the modem and see nothing relating to sync speed or margin. A hint here might be useful.

What kind of modem do you have? As far as I know All DSL modems
display downstream and upstream sync speeds. Easiest thing to do is just google your modem and either look for the manual online or google sync speeds+model of your modem. Something should pop up.