U.S. CitiesCity-Data Forum Index
Go Back   City-Data Forum > General Forums > Science and Technology > Internet
 [Register]
Please register to participate in our discussions with 2 million other members - it's free and quick! Some forums can only be seen by registered members. After you create your account, you'll be able to customize options and access all our 15,000 new posts/day with fewer ads.
View detailed profile (Advanced) or search
site with Google Custom Search

Search Forums  (Advanced)
Reply Start New Thread
 
Old 07-26-2010, 11:41 AM
 
Location: Victoria TX
42,663 posts, read 75,366,687 times
Reputation: 36174

Advertisements

Good comments. Two years ago I had a similar problem, numerous service calls, finally somebody admitted that there are to many people trying to water their lawns with the same hose, and service drops off when kids come home from school and download music. But a drop from 10 MBI to 0.02 Mbi seems excessive, unless it's designed to drop off one blade at a time, or something. A tech said he thought there was a problem in one blade out of many, and not enough people are calling to report outages to be able to diagnose it without individually pulling each component and testing it.

I'll put a yogurt tub of water in the freezer, and set the modem on top of it next time it happens. Under would cool better, but condensation would drip into it. It gets a little warmer than the top of my flat screen. I keep my AC thermostat at 80. The outages do occur at the hottest part of the day, but due to AC, those are the coolest hours inside the house. Could be outdoor wiring. I turn on my AC when its near 90 inside, and cool it down to 80, and then is when the outages occur.

No SNR shown on moden trace---only model, serial and version numbers (the story of my life). Googling DOCSIS 1.0/1.1/2.0 just gets me QA forums with people asking the same questions and getting no answers.

Last edited by jtur88; 07-26-2010 at 12:12 PM..
Reply With Quote Quick reply to this message

 
Old 07-26-2010, 12:13 PM
 
16,308 posts, read 25,262,012 times
Reputation: 8302
DOCSIS 1.0/1.1/2.0

That is just the standard or protocol used to transmit data across the cable system network, it is not the model of your modem.

Sometimes it is tough to view the SNR, often behind a default password to get in, as is my Webstar modem, but you should be able to find out how by searching.

My experience has been that the cable company hates it when you can tell them the SNR, as it confirms that it is not you or your PC or router. It could also be your cabling inside your home.
Reply With Quote Quick reply to this message
 
Old 07-26-2010, 01:24 PM
 
Location: Victoria TX
42,663 posts, read 75,366,687 times
Reputation: 36174
It's an Ambit U10C018. Googling that yields a lot of people asking the same question and nobody answering it.
Reply With Quote Quick reply to this message
 
Old 07-26-2010, 02:11 PM
 
16,308 posts, read 25,262,012 times
Reputation: 8302
What is displayed when you type in 192.168.100.1?

If you get a logon screen, use "user" for both the user name and password

I found references where people have posted the info from their Ambit U10C018
Quote:
Ambit U10C018

Cable Modem Downstream
Downstream Lock : Locked
Downstream Channel Id : 46
Downstream Frequency :
Downstream Modulation : QAM256
Downstream Symbol Rate : 5360537
Downstream Interleave Depth : 32
Downstream Receive Power Level : 0.9 dBmV
Downstream SNR : 35.9 dB This is the one you are looking to be above 30
Reply With Quote Quick reply to this message
 
Old 07-26-2010, 02:55 PM
 
Location: Victoria TX
42,663 posts, read 75,366,687 times
Reputation: 36174
Quote:
Originally Posted by Asheville Native View Post
What is displayed when you type in 192.168.100.1?
OH, I see. When I log in, I get 36.9, but my download speeds now are the expected 10 Mbi. Ill try it when there is a downage.
Reply With Quote Quick reply to this message
 
Old 07-27-2010, 01:07 PM
 
Location: Victoria TX
42,663 posts, read 75,366,687 times
Reputation: 36174
OK, I now have my daily afternoon dropoff.

Download speed 1.57 Mbi (normal 10 Mbi)
SNR 30.7 dB (normal 36,9)
Reply With Quote Quick reply to this message
 
Old 07-27-2010, 01:30 PM
 
16,308 posts, read 25,262,012 times
Reputation: 8302
Quote:
Originally Posted by jtur88 View Post
OK, I now have my daily afternoon dropoff.

Download speed 1.57 Mbi (normal 10 Mbi)
SNR 30.7 dB (normal 36,9)
I suspect that the sun shinning on a cable, junction box or something is what is happening. Does the cable come in to your house on the west side, and is the sun now heating up the splitter or any exterior connections?

The fact that the SNR coincides with your speed drop off discounts anything but a bad connection or cable segment or cable equipment on the pole. If you can get a tech out at the time of day the SNR drops, he should be able to isolate the problem with their test equipment.

When you call in, and can tell them that you can directly track your speed with the SNR, they can't blame your computer or router, and if they have any competency, they will recognize the problem is on their side, demand to talk to Tier 2 support when you call in, if the initial person doesn't pick up on that.
Reply With Quote Quick reply to this message
 
Old 07-27-2010, 02:44 PM
 
Location: Victoria TX
42,663 posts, read 75,366,687 times
Reputation: 36174
My cable is underground. Wiring shouldn't be the problem, because with drops down to 0.02 Mbi, my cable TV should be tiling or dropping out completely, unless it's after the splitter.

The cable tech was just here, swapped out my modem, everything now seems to be wonderful. SNR up to 39.6, steady 10 Mbi download, Ping rate 58. But now I'm getting a little packet loss ( 3 or 4 /250) which I never had before.

Which raises this interesting question? Why aren't modems furnished with an internal diagnostic, enabling one to read how well they are functioning?

Last edited by jtur88; 07-27-2010 at 02:52 PM..
Reply With Quote Quick reply to this message
 
Old 07-27-2010, 07:45 PM
 
16,308 posts, read 25,262,012 times
Reputation: 8302
Quote:
Originally Posted by jtur88 View Post
My cable is underground. Wiring shouldn't be the problem, because with drops down to 0.02 Mbi, my cable TV should be tiling or dropping out completely, unless it's after the splitter.

The cable tech was just here, swapped out my modem, everything now seems to be wonderful. SNR up to 39.6, steady 10 Mbi download, Ping rate 58. But now I'm getting a little packet loss ( 3 or 4 /250) which I never had before.

Which raises this interesting question? Why aren't modems furnished with an internal diagnostic, enabling one to read how well they are functioning?
TV, analog and digital seems to be much more tolerant, as when I was having the problem I described earlier, both the analog and digital TV reception was as good as it ever is.

Why not build the diagnostics in, to some extent I think there is, but it is for the cable company to access, not the end user. The second reason, $$$
Reply With Quote Quick reply to this message
Please register to post and access all features of our very popular forum. It is free and quick. Over $68,000 in prizes has already been given out to active posters on our forum. Additional giveaways are planned.

Detailed information about all U.S. cities, counties, and zip codes on our site: City-data.com.


Reply
Please update this thread with any new information or opinions. This open thread is still read by thousands of people, so we encourage all additional points of view.

Quick Reply
Message:

Over $104,000 in prizes was already given out to active posters on our forum and additional giveaways are planned!

Go Back   City-Data Forum > General Forums > Science and Technology > Internet
Follow City-Data.com founder on our Forum or

All times are GMT -6. The time now is 06:50 AM.

© 2005-2019, Advameg, Inc. · Please obey Forum Rules · Terms of Use and Privacy Policy · Bug Bounty

City-Data.com - Archive 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35 - Top