Need help figuring out why I am having connection issues (~10 second lag spikes every couple minutes)
I am currently experiencing consistent lag spikes every couple minutes that last anywhere from 1-10 seconds, which is considerably frustrating, naturally. (My internet connection is directly wired to the router so this almost certainly isn't a wifi issue.) Aside from when the lag spikes hit, my connection is not slow or delayed in any noticeable way, but my connection is entirely down for a few moments when they occur (no services work, websites won't load etc).
I've had this issue a couple months ago, and after several technicians came out to try and diagnose and fix the problem, what ended up working then was when the last guy replaced the line because the line was bad. Essentially my signal strength was weak. My internet was perfect for months until tonight. While this might not even be the same issue it seems unlikely since this is the only consistent connection issue I've had in literally years and it is pretty much the exact same problem as before.
I ran into this problem frequently in the early AM, from 10PM to 4AM, but I had it happen at other hours as well. It is inconsistent, which is odd. I checked for packet loss and had none, and my connection is fine until the internet suddenly cuts out. (Of course, the timing of this problem is a big issue because it's not likely to happen when a technician is here to see it.)
My ARRIS BGW210-700 is several years old at this point but has been fairly reliable. The log says that I have a lot of "generic discards" but this is pretty normal. Nothing especially unusual is going on in the logs, and sometimes even when I have these issues nothing shows up in the log at all. Likewise the last time I had a technician come by they found nothing wrong with the router then, either.
I would assume that the most likely issue is the same as before; a problem with the line. However, it seems strange that the line would be having issues so soon after replacing it, given that I had gone years without running into this particular issue in the past. I should mention the area I live in gets pretty hot and humid especially this time of year, so I wouldn't be surprised if that caused problems with the line in some way, as well, indirectly or otherwise.
(Another thing worth noting is that I originally started having the issues last time after AT&T ran lines preparing the neighborhood for fiber if I recall correctly. I don't know if this is related but I don't want to discount anything, and it was strange how these issues started happening relatively soon after.)
I've been with AT&T for years, over a decade probably at this point, and in this time the service has been very reliable, and I've never had consistent internet problems like this. I am trying to figure out what the problem might be before I call a technician so that I might see it fixed faster, and hopefully not have this problem crop up again in the future.
And if it is likely to be a line problem again, if there is a way I can encourage this be properly tested and/or fixed early on that would be great since it took about 3-4 technicians before the problem was fixed properly last time, and I'd like to see this problem fixed in a day or two not in a week or two as it all but makes my internet virtually unusable.
If any additional information is needed, I can provide it. My attempts to try and figure out what this is on my own have not worked out, so I'm posting here for assistance. What do I need to do to ensure this problem doesn't happen again, and is fixed efficiently?