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Forum Discussion
Netgear CM700/Nighthawk AC4000 - High uncorrectables/power levels
So I had a CM1000 modem and Nighthawk AC4000 router over the past year without noticeable issues. Then at the end of July through August, I was having my Internet constantly drop out every day. Outside temperatures were in the high 90s/low 100s. About two weeks ago, I finally had a tech from my ISP come out, and he checked the outside and replaced a filter. However, he also told me my modem downstream power levels were all over the place, ranging from -3 to 10 depending on the channel frequency. He suggested getting a new modem, because it was likely something faulty with the modem.
I bought a CM700, and that’s been hooked up for about two weeks. The drops have only happened a few times, but the outside temperatures have been a lot cooler (high 70s/low 80s), so there probably hasn’t been as much fluctuation.
However, when I log into this modem’s admin page, the downstream power levels still have a large range in the decibels, and there are a large number of uncorrectables (the numbers in the attached image reflect only 24 hours after rebooting my modem, so the numbers had reset). Something is still off here, and I’d suspect if the temperatures went up again, the drops would return.
I don’t have any splitters, attenuators, etc. connected. I’ve switched out my Coax cable (and every cable connected is new and came with the new modem). All attachments are tight.
Does this likely seem to be an issue with the line outside my house? Any other things I need to test before attempting to call my ISP so that I cover everything (I’m not super tech-savvy, so if there is, please explain in detail)?
What should be a normal number of correctables/uncorrectables? Are my SNR numbers fine?
I bought a CM700, and that’s been hooked up for about two weeks. The drops have only happened a few times, but the outside temperatures have been a lot cooler (high 70s/low 80s), so there probably hasn’t been as much fluctuation.
However, when I log into this modem’s admin page, the downstream power levels still have a large range in the decibels, and there are a large number of uncorrectables (the numbers in the attached image reflect only 24 hours after rebooting my modem, so the numbers had reset). Something is still off here, and I’d suspect if the temperatures went up again, the drops would return.
I don’t have any splitters, attenuators, etc. connected. I’ve switched out my Coax cable (and every cable connected is new and came with the new modem). All attachments are tight.
Does this likely seem to be an issue with the line outside my house? Any other things I need to test before attempting to call my ISP so that I cover everything (I’m not super tech-savvy, so if there is, please explain in detail)?
What should be a normal number of correctables/uncorrectables? Are my SNR numbers fine?
1 Reply
They need to send a new tech to check your line. If both modems are having the same issue, it isn't the modem.
And your power levels are all over the place. They should be withing 3.5dbmv of each other. You're way over that.
