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CM1000 Xfinity issues
I am quite frustrated at this point. I had a CM600 modem to support Comcast's Extreme 150 service. I've had it for a few years and was consistently getting 160 to 170mbps speed from it. About thre...
Well it is finally fixed. The tech showed up today and I showed him the two frequencies that were having the problem. He checked outside, and then at the tap. He came into the house and said he needed to call a bucket truck in to fix it. I got a recorded call from Comcast that they were working to fix the issue. I got a second call an hour later that the issue was fixed. I ran a speed test and got a consistent 160mbps (yay!). I used the reset button on the modem and let it re-provision. All the signal/noise and power levels were good and there were no uncorrectable codewords. They didn't tell me what they fixed, but at long last, it is fixed.
vkdeltawrote:do you have lot of attenuators or splitters at home?
The main coax line comes into the garage where, via a splitter, it feeds all the coax outlets in the house. Each coax outlet has a unique line from the main splitter in the garage. Regarding the outlet that the modem is plugged into, I had two, two-way splitters on it: one with an output to the modem and an output to the input of the second two-way splitter, and the second two-way splitter had one line to a cable box and one line to a bonded MoCA 2.0 adapter for our MoCA network. We actually got rid of the cable box, so I removed that splitter and now the coax outlet only has one, two-way splitter: one output feeds the modem and one output feeds the MoCA adapter. I'm not sure what you mean by attenuators, but we do have two POE filters on our coax, one at the main line into the garage to be sure our MoCA network doesn't leave the house, and a second attached directly to the modem because I was advised that modems don't appreciate being bombarded by the electronic traffic the MoCA network generates. Below are links to pics of updated screenshots of the cable connection. Power issues seem to have gotten worse!
Your upstream power levels are WAY too high. Look at the second image you posted. Look at the three upstream channels under power. All three are around 59 and they should be about 30-35. This is a COMCAST issue. I just called them they other day and I told them what to look at and they found that it was not just my house but 7 other houses with the issue. You need to tell them what to do. If they send someone to the house, show them those three channels. Ask that they look on the tap to see if it's the same out at the street. If it is, it's their problem. If it isn't, then it's a cabling issue. My internet drops out like 4 times a day. They replaced every cable from the tap to the modem including trenching a new cable under my yard. It is not the NetGear modem. It's a wayward amp or connection somewhere in the system. You have to be persistent with them. Don't give up. I actually ended up getting a call from Corporate because I am now labeled a "chronic" customer.