Solved

New modem?

Posted on 2016-09-29
4
74 Views
Last Modified: 2016-09-30
I have a Motorola SB6121 modem.  For the past week & a half, I've been having intermittent signal loss, usually around noon.
I finally contacted Comcast today and "Rick" stated that the issue is that my modem is far too old and is probably causing the problem.

Logs indicate around the time of the dropped signal, the following (some repetitive)
Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;
SYNC Timing Synchronization failure - Loss of Sync;
No Ranging Response received - T3 time-out;
MIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1;

Now, I really don't know what the above indicates, and if it is in fact a modem starting to croak, I can live with that (I truly don't remember when I bought it, but I could easily look it up and suspect it's around 2-3 years old).

But, particularly if there is an issue with it, what's a good model to look at that doesn't break the bank?
0
Comment
Question by:sirbounty
4 Comments
 
LVL 83

Assisted Solution

by:Dave Baldwin
Dave Baldwin earned 125 total points
ID: 41822378
First, you need to look at the list of modems that Comcast supports.  http://mydeviceinfo.xfinity.com/   Your SB6121 modem is there but it says it's made by Arris.
0
 
LVL 22

Accepted Solution

by:
eeRoot earned 250 total points
ID: 41822399
Loss of sync and timeouts could be an issue with the modem or the Comcast line.  Does your modem's logs show signal strength?

If you do buy a new modem, the Motorola's that are approved for use by Comast are the best option.  And they're not too expensive.
http://www.newegg.com/Product/Product.aspx?Item=N82E16825690002
0
 
LVL 24

Assisted Solution

by:masnrock
masnrock earned 125 total points
ID: 41822727
I bought a SB 6141 from the Warehouse Deals sections of Amazon. Has worked like a charm.

However, it sounds like your issue might require a tech to come out. Sometimes poor signal is starting from the Comcast office, or there could even be an issue somewhere in between.
0
 
LVL 67

Author Comment

by:sirbounty
ID: 41823857
Didn't happen today - perhaps it just needed a hard reboot or perhaps Comcast identified the issue.  Thanks for the ideas.
0

Featured Post

Windows Server 2016: All you need to know

Learn about Hyper-V features that increase functionality and usability of Microsoft Windows Server 2016. Also, throughout this eBook, you’ll find some basic PowerShell examples that will help you leverage the scripts in your environments!

Question has a verified solution.

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

Suggested Solutions

Title # Comments Views Activity
Skype for Business video calls drops 2 59
iMac cannot 'remember' Wifi connection after restarting. 3 37
Some devices won't connect to AP 2 25
Patch panel 7 38
DECT technology has become a popular standard for wireless voice communication. DECT devices are not likely to be affected by other electronic devices and signals because they operate in a separate frequency-band.
In this article, I am going to show you how to simulate a multi-site Lab environment on a single Hyper-V host. I use this method successfully in my own lab to simulate three fully routed global AD Sites on a Windows 10 Hyper-V host.
After creating this article (http://www.experts-exchange.com/articles/23699/Setup-Mikrotik-routers-with-OSPF.html), I decided to make a video (no audio) to show you how to configure the routers and run some trace routes and pings between the 7 sites…
Here's a very brief overview of the methods PRTG Network Monitor (https://www.paessler.com/prtg) offers for monitoring bandwidth, to help you decide which methods you´d like to investigate in more detail.  The methods are covered in more detail in o…

772 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