Go Premium for a chance to win a PS4. Enter to Win

x
?
Solved

How do I troubleshoot erractic Comcast Internet Speeds

Posted on 2013-12-12
2
Medium Priority
?
549 Views
Last Modified: 2013-12-27
In the past year I have averaged 28 mbps with Comcast High Speed Internet.  Recently the service has been unpredictable..Per speedtest.net one minute I get a download speed of 28 and if I try the speed test 5 minutes later it is 3 mbps.  It has been so erratic at times I can not work on the computer connected to Comcast and am forced to use a T-Mobile Hotspot.  Note I have tried multiple computeres wired into the modem with the same speed results.

My setup is a:
Cable Modem
A PC directly wired via ethernet into the cable modem

Comcast has said they have done everything over the phone they can do and will send a tech out over the weekend.  My fear is they are going to immediately blame it on the cable modem and tell me to buy a new one without researching my issue.  How do I prepare for the tech coming out so I can avoid the "go get a new modem" response.

Note the modem is only a few months old.  It is a DCP3008 CISCO Cable modem.  The Cable connection comes into the house at the basement and then is connected to a splitter.  Once branch comes upstairs to my cable TV which is fine and the other branch from the splitter comes upstairs and connects to my cable modem.

Note I will go downstairs tomorrow with the modem and connect the income signal from outside into the modem and see if that makes a difference....so far I only checked downstairs that the splitter connections were fine.  It was all put in 6 months ago and it looks tight.

Do they sell anything at a MicroCenter in terms of a tool where I could test the speed outside of the modem ?
0
Comment
Question by:upobDaPlaya
2 Comments
 
LVL 54

Accepted Solution

by:
Scott Fell,  EE MVE earned 2000 total points
ID: 39715815
I have had good luck with comcast.  At one time, I had my own cable modem/router.  When I had issues, they tried everything and blamed it on the cable modem router.  They were right.

Another time they came out and checked my line.  Turned out somebody had recently added new service at the junction box and that took away my speed so they put in a new line and buried a cable and all was good.

It could be the splitter and good point to check the speed downstairs.
0
 

Author Closing Comment

by:upobDaPlaya
ID: 39742959
Comcast was out today...They did some type of upgrade that hosed a lot of people for a weeks according to the tech.  My signal seems to be back now on a consistent basis..
0

Featured Post

Important Lessons on Recovering from Petya

In their most recent webinar, Skyport Systems explores ways to isolate and protect critical databases to keep the core of your company safe from harm.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Sometimes you have to pull out old tricks to get a new firewall to work… While we were installing a new Sonicwall at a customers site we found that sites they were able to visit before were not working.  It seemed random and we could not understa…
Why do some people recommend buying business VoIP from an ISP? What are the benefits to my company? What are the costs?
Video by: ITPro.TV
In this episode Don builds upon the troubleshooting techniques by demonstrating how to properly monitor a vSphere deployment to detect problems before they occur. He begins the show using tools found within the vSphere suite as ends the show demonst…
How to fix incompatible JVM issue while installing Eclipse While installing Eclipse in windows, got one error like above and unable to proceed with the installation. This video describes how to successfully install Eclipse. How to solve incompa…
Suggested Courses

963 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question