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| Computers Forum Index » Computer - DCOM - Modems (Cable) » Modem model versus download speed?... |
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| Marco... |
 Posted: Sat Apr 25, 2009 12:46 pm |
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Guest
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How much does my older cable modem affect download speed?
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:
Quote: Old modem? Post modem model and version numbers
"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..
my followup:
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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| Ken Whiton... |
| Posted: Sun Apr 26, 2009 5:16 am |
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*-* On Sat, 25 Apr 2009, at 05:46:49 -0700,
*-* In Article
aaf8eb44-f40e-4a63-a099-f4d8d80debbd at (no spam) y6g2000prf.googlegroups.com,
*-* Marco wrote
*-* About Modem model versus download speed?
Quote: How much does my older cable modem affect 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.
Quote: 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?
That's the service level I have.
Quote: ====================
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/
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.
Quote: http://www.speakeasy.net/speedtest/
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.
Quote: according to Comcast I should be getting 6 Mbps
If you read the fine print you'll find that that's *UP TO* 6 Mbps.
Quote: 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:
Old modem? Post modem model and version numbers
"IF" your modem supports it check signal power and snr at
http://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..
my followup:
SurfBoard 3100 appears to be DOCSIS 1.1
Mine is a Motorola SURFboard SB5100, which supports DOCSIS 2.0.
Quote: Downstream Value
Signal to Noise Ratio 37 dB
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. :-)
Quote: 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
49 dBmV here Also from the same post: "Upstream should be below
55db", so you're marginally high there.
Quote: what is a good reading?
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 at (no spam) surfglobal.net.INVAL (remove the obvious to reply) |
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| Andrew Rossmann... |
| Posted: Sun Apr 26, 2009 4:18 pm |
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Guest
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In article <aaf8eb44-f40e-4a63-a099-
f4d8d80debbd at (no spam) y6g2000prf.googlegroups.com>, prenom_nomus at (no spam) yahoo.com
says...
Quote: How much does my older cable modem affect download speed?
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?
my followup:
SurfBoard 3100 appears to be DOCSIS 1.1
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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| Marco... |
| Posted: Sat May 02, 2009 12:45 pm |
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Guest
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On Apr 25, 10:14 pm, Ken Whiton <kenwhi... at (no spam) surfglobal.net.INVAL>
wrote:
Quote: *-* Marco wrote
*-* About Modem model versus download speed?
How much does my older cable modem affect download speed?
I'm thinking of down-tiering to Comcast 1 Mbps service (we do very
little video) would I expect a similar percentage drop?
That's the service level I have.
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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