Is there something that can be done about high latency and jitter at my first-hop on Comcast's network? I've been noticing this problem nightly for at least a month, where I'll see extreme latency and packet loss at the first hop outside my home. I'm testing using a windows 10 PC that's connected to my firewall with a 1-gig ethernet connection. The same ping to my local firewall is consistent at <1ms latency, so I'm fairly confident it's not contributing to the problem. This is causing problems with applications like remote desktop, which I'm using far more these days (as I assume many are).
Can't see your pics. Since you are a new poster, they need to be approved by a Forum Admin. That could take some time. In the interim, you could try hosting them at one of those free third-party pic hosting sites like Imgur or Photobucket and post the link to them here.
Post the upstream power level numbers as well.
Can't see your latest pic.
The downstream power is high. Is there an amplifier on the coax line leading to the modem ? If so, try removing it. If not, try using a 3 dB signal attenuator pad like this one on the back of the modem;
You could try a 6 dB one as well. Not certain that this is the direct cause of the problem. YMMV. Good luck !
Does anyone from Comcast actually read these forums? I'm wondering if I'm just wasting my time here.
I did (finally) get in touch with an agent using chat. He blamed my wireless connection (I'm not using wifi), before providing me this gem:
"7:20:03 PM Ann Marie : ’Im sorry that we haven't been able to get the MODEM working, but after performing [list troubleshooting steps taken] we've determined that the modem is working and responding to our efforts. "
Have you tried an attenuator ?