I pay for the Gigabit Speed service and bought the Arris SBG8300 as approved by Comcast for Gigabit Speed service. I am unable to get quality service with download speeds in the 10-30 Mbps range (connected to ethernet), but often below 10 Mbps and dropping off completely. I believe I am having similar issues that others seem to be having with the Arris SBG8300 in regards to upstream / downstream power levels and was hoping to get some help / feedback on these issues and how to approach Comcast and get these handled. As of note, what is weird is when first connected everything seemed to work fine for the first 2 weeks, but hasn't worked for 2-3 weeks now with Comcast saying everything is fine and Arris' tech support saying my power levels aren't right and to reach out to Comcast. Comcast support, when I am able to get in touch, doesn't appear to understand the issues I am trying to explain (which, given my elementary understanding of all of this, is hard to explain). Here are my specs: Downstream Levels Upstream Levels Per Arris' Guidelines, Downstream Power Levels at 256QAM are supposed to have SNR levels 30-33 dB or greater depending on power. My dB levels dip below 30 on Channel Bonds 6-11 & 20 and the power level is pretty much outside the -15 to -6 dBmV range from Channel Bond 5-12. Per Arris' Guidelines, Acceptable Upstream Power Levels are +61 dBmV to 45 dBmV. I consistently get ~43 dBmV. My understanding is that the Arris guidelines are not accurate, but if that is not the issue, I'm not sure why I am unable to get solid connectivity per my plan. Any help would be appreciated! If any additional information is needed, I'm happy to provide. Thanks in advance.
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