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Forum Discussion
CM500 cable modem -- losing connections & grounding
Heya folks...would like to get insight on grounding, in-house wiring, and cable modems here. Currently with Comcast and a CM500, was fine for a few years, now currently dealing with several losses of...
Hey Furry...thanks for taking a look at the message. The troubleshooting details you're asking about are in the link to Comcast forum post at the bottom of my message, and has all the relevant background. Router is a Netgear Nighthawk, it's irrelevant to this post, as I've taken it out of the equation. Realize you're just catching up on details I've already been through, so thank you again for taking a look!
I am specifically jumping past all those details to ask specifically about cable modem sensitivities to variations in house electricity groundings, and would love to know more about that.
Or maybe the modem is just flakey and I need to get a new one...?
You'll need to get with the ISP and have them check the items mentioned here. Most modem issues found are betweent the ISP service and modem.
Good Luck.
Hi Furry...realize you're on the front lines of all kinds of networking issues and see repeat incidents over and over. In this case, I've already had a tech to the house and am trying to understand the impact of house electric grounding to a Netgear CM500 cable modem. Can't imagine I'm the only one who's run into this.
Have seen lots of support incidents trace connectivity issues back to line issues from the street or a bad splitter somewhere, or maybe the ISP monkeying with something the customer doesn't know about...in this case the ISP is SUGGESTING that my variable house current is causing the cable modem to hiccup, resulting in packet loss. Do you have any experience with that angle?
Thanks again for listening!
You'd need to get a power meter and check your house hold power to see if there is any fluxuations in power and if you have any grounding problems. Find any power devices that maybe introducing power fluxuations. If you feel there is a house hold problem, then you might get a Qualified Electrician out to the home and have him run some tests on the power in the home. You might power everything in the home off while testing is happening. Large items. Try them all off and then bring them online 1 at a time and have the electrician test. Have them check grounding points as well.
Try a different power adapter for the cable modem as well.
FURRYe38 wrote:You'd need to get a power meter and check your house hold power to see if there is any fluxuations in power and if you have any grounding problems.
Right...have done this already, which is where I'm trying to have the conversation -- why is a cable modem sensitive to power fluxuations when other electrical units in the house are not? i.e., TV stays on during viewing, lights don't flicker, can still listen to FM radio, etc. Shouldn't cable modems have some built-in electronics to manage this?