Modem model versus download speed?
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Posted by Marco on April 25, 2009, 8:46 am
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How much speed loss would be expected from a wireless router in the mix? I'm thinking of down-tiering to Comcast 1 Mbps service (we do very little video) would I expect a similar percentage drop? thanks ==================== from my post at alt . online-service . comcast original: download speed testing I get around 4.5 to 5.5 Mbps using these: http://speedtest.comcast.net/ http://www.speakeasy.net/speedtest/ but only get 2.7 to 3 Mbps using this site: http://www.speedtest.net/index.php according to Comcast I should be getting 6 Mbps Anybody test lately and which sites seem more believable? (should I complain that I don't get 6 Mbps) note: upload speed seems more consistent around 1 Mbps It seems that the chosen server for each test excessively influences the test a response:  SurfBoard 3100 appears to be DOCSIS 1.1 Downstream Value Signal to Noise Ratio 37 dB Power Level 0 dBmV The Downstream Power Level reading is a snapshot taken at the time this page was requested. Please Reload/Refresh this Page for a new reading (this did not change on refresh) Upstream Value Power Level 56 dBmV what is a good reading? | |||||||||||||
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Posted by Ken Whiton on April 26, 2009, 1:14 am
Please log in for more thread options *-* In Article aaf8eb44-f40e-4a63-a099-f4d8d80debbd@y6g2000prf.googlegroups.com, *-* Marco wrote *-* About Modem model versus download speed? Probably not much. According to <http://www.speedguide.net/faq_in_q.php?category=92&qid=170> , the changes in DOCSIS 2.0 over DOCSIS 1.1 are on the upstream channel. There's no mention of any enhancements to the downstream channel. Furthermore, <http://en.wikipedia.org/wiki/DOCSIS#Speed_Table> lists the same downstream "Maximum usable speed" for both versions. That's the service level I have. On three tests I get 0.875, 0.900, and 0.872 Mbps download speed, and 0.365, 0.364, and 0.362 Mbps upload speeds, using their Boston, Mass., server, the one closest to me. 928, 929, and 880 Kbps download, 360, 365, and 191 Kbps upload, using New York City. 0.87, 0.87, and 0.90 Mbps download, 0.36, 0.36, and 0.36, upload, using Portland, Maine. As you can see, my results there are right in line with the other two, so I don't know why yours are so much slower than the others. Note that I have a router, and I'm streaming Internet radio to my other computer, so I know that these tests aren't getting the full benefit of my available bandwidth. If you read the fine print you'll find that that's *UP TO* 6 Mbps. Mine is a Motorola SURFboard SB5100, which supports DOCSIS 2.0. 36 dB here According to this post, from December, 2004: http://groups.google.com/group/comp.dcom.modems.cable/msg/e7105dcdc643e030 it should be above 30, so we're both good there. 4 dBmV here From the same post: "The recommendation is +15 to -15, so again we're both good. :-) 49 dBmV here Also from the same post: "Upstream should be below 55db", so you're marginally high there. From another old thread here is what a poster was told by a Cox level 2 tech: Ideal Normal SNR 30+ mid 30's Down Power 0 0-3 Up Power 50 or lower 30-50 Ken Whiton -- FIDO: 1:132/152 InterNet: kenwhiton@surfglobal.net.INVAL (remove the obvious to reply) | |||||||||||||
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Posted by Marco on May 2, 2009, 8:45 am
Please log in for more thread options wrote:Do you have VOIP service? We are thinking about getting magic jack and wondering if the upstream speed would be an issue at the 1 Mbps service level. by the way thanks for the previous replies - very helpful | |||||||||||||
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Posted by Ken Whiton on May 3, 2009, 2:08 am
Please log in for more thread options *-* On Sat, 2 May 2009, at 05:45:12 -0700 (PDT),*-* In Article 9f7d5e40-95da-4b5b-9128-6edcfacea0dd@j18g2000prm.googlegroups.com, *-* Marco wrote *-* About Re: Modem model versus download speed? No. A little poking, probing, and digging at the magicJack web site uncovers the following answer to several related FAQuestions: "A minimum bandwidth UPLOAD speed of 128 kb/s (or kbit/s or kbps) is required." http://service.liveperson.net/hc/s-73335289/cmd/kbresource/kb-4150654949807238978/view_question !PAGETYPE?sc=19&sf=101133&documentid=334766&action=view http://service.liveperson.net/hc/s-73335289/cmd/kbresource/kb-4150654949807238978/view_question !PAGETYPE?sc=19&sf=101133&documentid=335937&action=view http://service.liveperson.net/hc/s-73335289/cmd/kbresource/kb-4150654949807238978/view_question !PAGETYPE?sc=19&sf=101133&documentid=334771&action=view Since the upload speed test results I got were almost three times that value, I wouldn't think it would be a problem. You're welcome. Ken Whiton -- FIDO: 1:132/152 InterNet: kenwhiton@surfglobal.net.INVAL (remove the obvious to reply) | |||||||||||||
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Posted by Andrew Rossmann on April 26, 2009, 8:18 am
Please log in for more thread options In article <aaf8eb44-f40e-4a63-a099-f4d8d80debbd@y6g2000prf.googlegroups.com>, prenom_nomus@yahoo.com says... It should be more than enough for the 1M service. The 3100 is ancient. Although DOCSIS 1.x and 2.x support up to 38M down, many older modems don't have enough horsepower to actually push data that fast. I used to have an RCA that peaked at 5M. -- If there is a no_junk in my address, please REMOVE it before replying! All junk mail senders will be prosecuted to the fullest extent of the law!! http://home.att.net/~andyross | |||||||||||||
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> "IF" your modem supports it check signal power and snr athttp://192.168.100.1/
> If you get the right person when calling Comast they might check your
> signal levels from their end if your modem doesn't support it..