Disgusted with cable 1st few hours in Cable users http://www.dslreports.com/forum/r5836776 en Wed, 09 Dec 2009 06:48:32 EDT Wed, 09 Dec 2009 06:48:32 EDT Re: Disgusted with cable 1st few hours http://www.dslreports.com/forum/remark,6115336 bigjer : Hey, Thanks to the many experts on this forum I have achived really good speeds.
Upload-130kb/s
Download-3mb/s
1) I can't complain about that. Mostly what I did was reboot the modem ( shut down overnight ).
2) I went to speedguide.com as you people recommended and downloaded a registry tweak for concurrent downloads and that was it.
Ping tests (PCPitstop) were good, between 14ms & 100ms mostly. With the exception of the last site on the test. Australia I think. That one was over 200 ms.
My computer runs great, has a snap to it it didn't have before.I thank you for your sharing your knowledge and experience with me. Have a good night.]]> http://www.dslreports.com/forum/remark,6115336 Wed, 26 Feb 2003 02:33:33 EDT Re: Disgusted with cable 1st few hours http://www.dslreports.com/forum/remark,6067513 keo eke : According to DOCSIS specs modems should WORK from -15 to +15 but it says nothing about "quite nicely". I would say that having an upstream in the mid 30's and low 30's is unusual at least by design. Your modem will find the downstream and then will start broadcasting from +8 to +58dbmv to the headend until the headend says "I see you" it is at that point that the headend can adjust levels at the modem but only by 1 dbmv or so. Your SNR of 32.1 is OK, Modems should work from about 24 to 36db of SNR with no problem but it is better to be on the upper end than the lower end and you can add a db or two each way.
Once your signal gets above 54 or 55 dbmv other factors(distortions) come into play but up to that point your CNR(carrier to noise) and SNR(signal to noise) will continue to improve but once above that threshold the other distortions rapidly cancel out the affects of higher signal level. The same applies with to low of a signal, CNR and SNR will not be high enough away from the noise floor for good digital(modem) operation.]]> http://www.dslreports.com/forum/remark,6067513 Fri, 21 Feb 2003 12:09:57 EDT Re: Disgusted with cable 1st few hours http://www.dslreports.com/forum/remark,6062639 ThreeD :
said by keo eke See Profile:
You are correct, the headend does tell the modem if it should transmit higher or lower but it can only adjust the signal level about +1 or -1 dbmv at 1/4 dbmv intervals.

Good information. I did not know about the change limitations in xmit strength. I guess I need to go back and read that chapter again.:)
I have had the same levels, give or take a .5dBmv for about 5 months now and also the receive signal only varies about .5dBmv. No problems with the connection in that time and it is on 24/7. Prior to that I had a different modem with similar levels and results. The one thing that you mentioned that interests me is that with a higher xmit level, my SNR would potentially be better. Had not thought about that and the SNR is a bit low at 32.1db. I would prefer to see better on that, although as you also said, if it is not broken, don't fix it. ]]> http://www.dslreports.com/forum/remark,6062639 Thu, 20 Feb 2003 22:25:41 EDT Re: Disgusted with cable 1st few hours http://www.dslreports.com/forum/remark,6061975 keo eke : You are correct, the headend does tell the modem if it should transmit higher or lower but it can only adjust the signal level about +1 or -1 dbmv at 1/4 dbmv intervals. The modem will transmit at different levels until the headend tells the modem "I see you". The SNR will be better the higher the modem transmits up to about 55dbmv, hence may statement started with the word MOST, if your system is quiet and there are not tons of modems, digital boxes and ingress getting back to the headend than 33dbmv may work fine for you but if you start having trouble then I would look at why you are only transmitting at 33db.
My modem never goes offline and it has -12dbmv hitting it going through 2 2-way's and 1 3-way splitter, but if I had trouble than I would change the config back to the way Adelphia set it up but hey if it's not broke don't fix it.]]> http://www.dslreports.com/forum/remark,6061975 Thu, 20 Feb 2003 21:29:38 EDT Re: Disgusted with cable 1st few hours http://www.dslreports.com/forum/remark,6061719 ThreeD :
said by keo eke See Profile:
Most modems need to transmit at least 40 dbmv and not more than 54 dbmv on the upstream side to be effective(yours is at 33).

Not to be argumentative, I am sure that some modems have trouble as you say with those signal levels, but - Most DOCSIS modems, according to DOCSIS spec. will operate quite nicely on a receive signal between -15 to +15 dBmv. On the upstream, it is not unusual to have a signal in the mid 30 dBmv range. My modem is currently xmitting at +32.7 dBmv and my receive signal is +5dBmv. The xmit is controlled by the head end equipment. It tells your modem what strength to xmit at so that the head end receives a good signal. In fact when the xmit signal goes into the 40's, I would start getting concerned about the return signal path have too much loss. YMMV.:)]]> http://www.dslreports.com/forum/remark,6061719 Thu, 20 Feb 2003 21:09:54 EDT Re: Disgusted with cable 1st few hours http://www.dslreports.com/forum/remark,6030216 keo eke : hope that helps.]]> http://www.dslreports.com/forum/remark,6030216 Tue, 18 Feb 2003 01:29:38 EDT Re: Disgusted with cable 1st few hours http://www.dslreports.com/forum/remark,6030066 bigjer : Thank you.]]> http://www.dslreports.com/forum/remark,6030066 Tue, 18 Feb 2003 01:08:55 EDT Re: Disgusted with cable 1st few hours http://www.dslreports.com/forum/remark,6023079 keo eke : Well you could go over to the Adelphia forum and at the top of the page there are two good links to read through about cable modems.]]> http://www.dslreports.com/forum/remark,6023079 Mon, 17 Feb 2003 15:12:33 EDT Re: Disgusted with cable 1st few hours http://www.dslreports.com/forum/remark,6020317 bigjer : Good idea, I'm not to cable savvy. Thank you.
BTW, where can I get some specific info on all of this?
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WinMe Diml866r AdAware6 ZoneAlarm 3 NAV2002 Comcast cable RCA DCM235 Modem]]> http://www.dslreports.com/forum/remark,6020317 Mon, 17 Feb 2003 10:27:26 EDT Re: Disgusted with cable 1st few hours http://www.dslreports.com/forum/remark,6018180 keo eke : No bigjer you need to call Comcast and have someone from the maint. dept. look at your line. Most modems need to transmit at least 40 dbmv and not more than 54 dbmv on the upstream side to be effective(yours is at 33). It is hard to say where your problem is, either in your home or on the Comcast main line. You could go out and get a 4-way splitter(rated from5-1000mghz) and put it between your modem and the wall jack where the cable comes into the room and get your levels to spec but not knowing how many outlets are in your house and how many splitters there are before the modem makes a big difference. I think you should call Comcast and swing over to the Comcast forum to see if anyone in your area has been having trouble. Keo ]]> http://www.dslreports.com/forum/remark,6018180 Mon, 17 Feb 2003 00:55:22 EDT Re: Disgusted with cable 1st few hours http://www.dslreports.com/forum/remark,6015490 bigjer : CableGuyNJ, Can I do this stuff myself or is this to difficult and expensive? Also, where do I get instructions?
You're a great help, thank you.
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WinMe Diml866r AdAware6 ZoneAlarm 3 NAV2002 Comcast cable RCA DCM235 Modem]]> http://www.dslreports.com/forum/remark,6015490 Sun, 16 Feb 2003 19:51:52 EDT Re: Disgusted with cable 1st few hours http://www.dslreports.com/forum/remark,6007926 CableGuyNJ : no...he doesn't have good levels. Your downstream power (7.2dBmV) is too high. and your return/upstream (33dBmV) is too low. you need to either have a cable tech give you an attenuator pad of -6dB or move your cable outlet to a different splitter or splitter port.
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Have you smacked your contractor today?]]> http://www.dslreports.com/forum/remark,6007926 Sun, 16 Feb 2003 00:12:13 EDT Re: Disgusted with cable 1st few hours http://www.dslreports.com/forum/remark,6006459 Jeff7477 : you have good levels]]> http://www.dslreports.com/forum/remark,6006459 Sat, 15 Feb 2003 21:35:07 EDT Re: Disgusted with cable 1st few hours http://www.dslreports.com/forum/remark,6006267 bigjer : CableGuyNJ, This is what I got when I clicked on the link you provided.
forward path
signal acquired @ 555.004
snr 35.9 db
received signal strength 7.2dbmv
micro-reflections 23dbc
modulation 64 qam

data service details
provisioned address-yes
provisioned time-yes
provisioned configuration-yes
registered-yes
bpi-disabled

return path
connection-acquired
frequency-22mhz
power level-33.0dbmv
channel id-20
modulation-qpsk

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WinMe
Diml866r
AdAware6
ZoneAlarm 3
NAV2002
Comcast cable
RCA DCM235 Modem
[text was edited by author 2003-02-15 21:20:08]
]]> http://www.dslreports.com/forum/remark,6006267 Sat, 15 Feb 2003 21:14:21 EDT Re: Disgusted with cable 1st few hours http://www.dslreports.com/forum/remark,6002237 CableGuyNJ : for the RCA it is:
192.168.100.1/moreinfo.html
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Have you smacked your contractor today?]]> http://www.dslreports.com/forum/remark,6002237 Sat, 15 Feb 2003 13:43:53 EDT Re: Disgusted with cable 1st few hours http://www.dslreports.com/forum/remark,5953293 Jabbu :
said by bigjer See Profile:
dw2, This is my second try to post this same message. My os is Windows Millenium, which has run smooth and stable since day one.


An absolute miracle.]]> http://www.dslreports.com/forum/remark,5953293 Mon, 10 Feb 2003 23:48:39 EDT Re: Disgusted with cable 1st few hours http://www.dslreports.com/forum/remark,5951893 bigjer : Thanks, I will follow your instructions and post my results. ]]> http://www.dslreports.com/forum/remark,5951893 Mon, 10 Feb 2003 21:54:39 EDT Re: Disgusted with cable 1st few hours http://www.dslreports.com/forum/remark,5951449 joe bauers : Here are the steps to switch your IP address from an automatically assigned one to a static one, for accessing the internal diagnostics page for certain RCA cable modems (DCM 225, 235 and 245). This should work for Windows 95, 98 and ME. Note: you may want to print out this page as a reference.

1. Go to the network control panel (start, settings, control panel, then select the Network control panel).
2. In the network control panel, you will find a white box labeled "The following network components are installed:". Double click on "TCP/IP -> (model of your ethernet adapter)".
3. A window labeled TCP/IP properties should pop up, and the IP address settings should be visible. Click on the button for "Specify an IP address", and enter 192.168.100.10 in the IP address area, and 255.255.255.0 in the Subnet Mask area.
4. Click on the OK button on the bottom of this window, and the OK button at the bottom of the network control panel. You should now be prompted to restart the computer.
5. After the computer restarts, you should be able to access the diagnostics page.

To access the main diagnostics page for the RCA cable modems, go to: »192.168.100.1/moreinfo.html (signal levels). There is another diagnostics page with basic information at: »192.168.100.1/diagnostics.html.

To set everything back to normal, go thru steps 1 and 2, as shown above, but for step 3, click on the button for "Obtain an IP address automatically", and continue to step 4. ]]> http://www.dslreports.com/forum/remark,5951449 Mon, 10 Feb 2003 21:19:09 EDT Re: Disgusted with cable 1st few hours http://www.dslreports.com/forum/remark,5950796 l33tn00b : Try this website ... somewhat works

»www.speedguide.net

a famous site heh]]> http://www.dslreports.com/forum/remark,5950796 Mon, 10 Feb 2003 20:27:37 EDT Re: Disgusted with cable 1st few hours http://www.dslreports.com/forum/remark,5948415 bigjer : dw2, This is my second try to post this same message. My os is Windows Millenium, which has run smooth and stable since day one.
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WinMe Diml866r AdAware6 ZoneAlarm 3 NAV2002 Comcast cable RCA DCM235 Modem]]> http://www.dslreports.com/forum/remark,5948415 Mon, 10 Feb 2003 17:07:38 EDT Re: Disgusted with cable 1st few hours http://www.dslreports.com/forum/remark,5948346 bigjer : dw2, If I'm posting correctly, my specs should be listed below.]]> http://www.dslreports.com/forum/remark,5948346 Mon, 10 Feb 2003 17:02:42 EDT Re: Disgusted with cable 1st few hours http://www.dslreports.com/forum/remark,5943778 joe bauers : what operating system do you have?]]> http://www.dslreports.com/forum/remark,5943778 Mon, 10 Feb 2003 08:00:35 EDT Re: Disgusted with cable 1st few hours http://www.dslreports.com/forum/remark,5943573 bigjer : dw2, I'm connected directly to the internet, no router. I do not know how to set up a temp.static i.p. address or subnet mask. If you know a site where I can learn how to do this I will go there and read about it. If not I'm afraid I'm at a disadvantage.
Thanks all. ]]> http://www.dslreports.com/forum/remark,5943573 Mon, 10 Feb 2003 06:52:02 EDT Re: Disgusted with cable 1st few hours http://www.dslreports.com/forum/remark,5941486 joe bauers : For the RCA cable modems, you may need to temporarily set up a static IP address and subnet mask. The settings that have worked for me are (IP): 192.168.100.10, (Subnet Mask): 255.255.255.0. The diagnostics pages are at: 192.168.100.1/moreinfo.html (signal levels), and 192.168.100.1/diagnostics.html (status). Note: the PC needs to be connected directly to the modem, and cannot run thru a router. I have successfully used these settings for the DCM 225, 235 and 245 models.
Click for full size
Click for full size
]]> http://www.dslreports.com/forum/remark,5941486 Sun, 09 Feb 2003 22:43:38 EDT Re: Disgusted with cable 1st few hours http://www.dslreports.com/forum/remark,5941466 bigjer : keo eke, Thanks for your patience and help. ]]> http://www.dslreports.com/forum/remark,5941466 Sun, 09 Feb 2003 22:41:45 EDT Re: Disgusted with cable 1st few hours http://www.dslreports.com/forum/remark,5941219 keo eke : Well those links don't go to my internal web page so bigjer try just typing them in. I will have to work on posting links in threads, sorry. Check out the link that Optimized has in the post above.
[text was edited by author 2003-02-09 22:29:24]
]]> http://www.dslreports.com/forum/remark,5941219 Sun, 09 Feb 2003 22:19:09 EDT Re: Disgusted with cable 1st few hours http://www.dslreports.com/forum/remark,5941140 keo eke : Try 192.168.100.1/diagnostics.html or 192.168.100.1/signal.html . To capture a screen hit Ctrl+Prt Scr then open MS Paint from Programs-accessories and in edit click paste than save as a .jpg not .bmp if you don't get the hang of it right away just type the url that comes up when you type 192.168.100.1 in your next post and maybe we can get you to the signal level page.
[text was edited by author 2003-02-09 22:13:34]

[text was edited by author 2003-02-09 22:15:19]]]> http://www.dslreports.com/forum/remark,5941140 Sun, 09 Feb 2003 22:11:06 EDT Re: Disgusted with cable 1st few hours http://www.dslreports.com/forum/remark,5940874 bigjer : keo eke, That's not the screen I'm seeing. I don't know how to do a screen capture ( if that's what it takes ) to show you. I'm seeing "Thompson Cable Modem Diagnostics". Below that I get "Cable signal: ready" Below that I get A box "tuning" below that I get a box "ranging". No clickable links, no results but the test continues to run on and on.
Here "192.168.100.1moreinfo html" I get "page cannot be displayed".
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WinMe Diml866r AdAware ZoneAlarm NAV2002 Comcast cable RCA DCM235 Modem]]> http://www.dslreports.com/forum/remark,5940874 Sun, 09 Feb 2003 21:46:12 EDT Re: Disgusted with cable 1st few hours http://www.dslreports.com/forum/remark,5940234 keo eke : I not sure you may have to type in diagnostics after the 192.168.100.1 for that model, no space after the .1]]> http://www.dslreports.com/forum/remark,5940234 Sun, 09 Feb 2003 20:40:30 EDT Re: Disgusted with cable 1st few hours http://www.dslreports.com/forum/remark,5940198 Optimized : Does the RCA DCM 235 Modem even have a diagnostic page? I've never worked with it.

Docsdiag should help you get some answers.
»homepage.ntlworld.com/robin.d.h.···ocsdiag/]]> http://www.dslreports.com/forum/remark,5940198 Sun, 09 Feb 2003 20:38:11 EDT Re: Disgusted with cable 1st few hours http://www.dslreports.com/forum/remark,5940049 keo eke : Is this the screen you got? If so click on signal and scroll down and look at the upstream, downstream and snr levels and report back. If you are only getting the tuning page try this one 192.168.100.1moreInfo.html
[text was edited by author 2003-02-09 20:37:00]
Click for full size
]]> http://www.dslreports.com/forum/remark,5940049 Sun, 09 Feb 2003 20:24:47 EDT Re: Disgusted with cable 1st few hours http://www.dslreports.com/forum/remark,5939739 bigjer : keo eke, I followed your advice but don't know what to do. I stayed on the site for a while but don't know what to look for or expect. The tests just keep running and say complete. Do I get any results or does this web site do the tuning and you X out? I don't see any results. How long should I wait?
Told you I was new!
Need more directions.
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WinMe Diml866r AdAware ZoneAlarm NAV2002 Comcast cable RCA DCM235 Modem]]> http://www.dslreports.com/forum/remark,5939739 Sun, 09 Feb 2003 19:51:11 EDT Re: Disgusted with cable 1st few hours http://www.dslreports.com/forum/remark,5930616 keo eke : Open your browser and go to 192.168.100.1 you should be able to see your signal levels there. Modems like to transmit upstream between 40 and 54 and downstream between -15 to +15, your snr should be above 30 db. If the above url doesn't go to the modem diag page type moreInfo.html after the .1]]> http://www.dslreports.com/forum/remark,5930616 Sat, 08 Feb 2003 22:14:02 EDT Re: Disgusted with cable 1st few hours http://www.dslreports.com/forum/remark,5929999 bigjer : carbonfour,
Thanks for your interest. I have a RCA DCM 235.
I'm sure you read about my problems. Obviously I don't know much about cable connections or cable modems. New to this kind of stuff. I don't often post on this forum and am not familiar with the ins and outs.
Right now my speeds are good, both up and down. I'll learn as I go I guess.
Have a good night
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WinMe Diml866r AdAware ZoneAlarm NAV2002 Comcast cable RCA DCM235 Modem]]> http://www.dslreports.com/forum/remark,5929999 Sat, 08 Feb 2003 21:05:02 EDT Re: Disgusted with cable 1st few hours http://www.dslreports.com/forum/remark,5907133 biohazard :
said by bigjer See Profile:
All I did was shut the modem off for the night,when I turned it back on,the above is what I got.


Commonly referred to as a Power Cycle. It solves most of my problems. Most likely Comcast screwed up the config it sent to your modem. Just outta curiosity.. what kinda modem do you have?

And a slight P.S. I finally found a fellow Holmdelian on DSLR ;)]]> http://www.dslreports.com/forum/remark,5907133 Thu, 06 Feb 2003 18:53:42 EDT Re: Disgusted with cable 1st few hours http://www.dslreports.com/forum/remark,5868772 bigjer : One problem solved! I'm new to cable so excuse me. Latest test results. 1.5 down and 130kb/s up. That's good enough for me. Now to get the tv receiver back and I'm all set. Thanks for listening to my headaches.I'll be back soon, maybe to help others.
Thanks a million.
P.S. All I did was shut the modem off for the night,when I turned it back on,the above is what I got. ]]> http://www.dslreports.com/forum/remark,5868772 Mon, 03 Feb 2003 06:15:05 EDT Re: Disgusted with cable 1st few hours http://www.dslreports.com/forum/remark,5865189 bigjer : Well here's an update. After 6 or so calls to comcast tech support they made an appointment for Sat. 3pm to adjust my signal. At 3:20pm comcast called to find out if the tech had arrived. I answered no and she said thank you and hung up! That was all I heard from them until I called today ( Sunday ). They never mentioned the missed appointment nor did they say why it wasn't kept. We made another appointment for friday 3pm. We'll see what happens this time.
Today I noticed the directv receiver is no longer in my house, I cannot find it! Not only did they take the sat. dish and tv receiver they took all the cable and the modem too.
Doesn't this either belong to me or directv?
The deal is I sell them my dish and they take the sale price ( $400 ) off my bill in the next 16 months.
What a mess I've gotten myself into! Meanwhile I'm stuck with 90kb/s up and 200kb/s +or- down!
Some story, huh? ]]> http://www.dslreports.com/forum/remark,5865189 Sun, 02 Feb 2003 20:28:39 EDT Re: Disgusted with cable 1st few hours http://www.dslreports.com/forum/remark,5844109 bigjer : Just to keep you good people informed, I called comcast today. They assumed that, from reading out of their book, one of the problems was a fragmented HDD!!! What idiots! How could a computer have a ping of 1000+ms and download speed of 200kb/s from a fragmented HDD. My drive btw is clean. Reformat/reinstall Nov,2002. Less than 2% fragmentation. 76% free space. TIF's, temp files and cookies cleaned daily.
Anyway she diagnosed the problem as a weak signal to the modem. A "tech" will be out tomorrow afternoon to raise the signal strength.
Sorry 'bout the rant, just venting.
Will let you know how it goes. ]]> http://www.dslreports.com/forum/remark,5844109 Fri, 31 Jan 2003 15:12:44 EDT Re: Disgusted with cable 1st few hours http://www.dslreports.com/forum/remark,5838296 bigjer : Tweak tester says all looks good! My last download speed test was 200+kb/s down. I ran the tweak tester earlier and used DR Tcp. Still lousy speeds.
No modem tweaks? I'm a little surprised.
I'll call them tomorrow.
The speed is so slow I can't do a line test. Waited 30 minutes for it to complete before I gave up.
Thanks and have a good night]]> http://www.dslreports.com/forum/remark,5838296 Thu, 30 Jan 2003 23:33:48 EDT Re: Disgusted with cable 1st few hours http://www.dslreports.com/forum/remark,5837872 mrbill : Give it a few hours to optimize and call them if it doesn't improve.
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------- mrbill "Playing in the sand with broadband" ]]> http://www.dslreports.com/forum/remark,5837872 Thu, 30 Jan 2003 22:53:43 EDT Re: Disgusted with cable 1st few hours http://www.dslreports.com/forum/remark,5837250 Jarhead : Try this and follow instructions for Tweaking

[url=http://www.dslreports.com/tweaks[/url]]]> http://www.dslreports.com/forum/remark,5837250 Thu, 30 Jan 2003 22:02:17 EDT Disgusted with cable 1st few hours http://www.dslreports.com/forum/remark,5836776 bigjer : Good evening all.I had the displeasure of having cable installed today! I ordered it, they made an appointment and showed on time. Cable was installed and all went well until the installer left and I did a speed and ping test. WOW what a disappointment. Download speed 300+or-, pings in the 400ms area. I have an RCA DCM 235 modem, ( if that makes a difference )
Besides call them back for a tech. can I do anything to improve the situation?
With my one way sat. I was downloading 800KB/s+or-.

Windows Millenium
512 mb SDram
ZoneAlarm 3
NAV 2002

Any ideas, modem tweaks?

P.S. It's comcast
[text was edited by author 2003-01-30 21:25:51]
]]> http://www.dslreports.com/forum/remark,5836776 Thu, 30 Jan 2003 21:21:10 EDT