Upstream channel power levels too low - what to do.
I'm paying for the most expensive plan available at my apartment complex (Gigabit). I'm getting ~600 Mbps download (which I'm okay with), and ~5 Mbps upload. The upload speed has become unbearable and, honestly, unacceptable for a top-tier modern internet plan.
For reference, 5 Mbps upload speeds means it takes 40 minutes to upload a 10-minute home video to social media. 5 Mbps means streaming gameplay on something like Twitch is guaranteed to be horrible quality. 5 Mbps means having choppy video calls with family back home. 5 Mbps means my personal file server is painfully slow outside of the local network.
When I called support this morning, after 40 minutes of running identical speed tests and four separate modem restarts, the support agent directed me to call my modem manufacturer Arris. Instead of doing that, I looked into my modem (SB6190) myself and found this:
|Upstream Bonded Channels|
|Channel||Lock Status||US Channel Type||Channel ID||Symbol Rate||Frequency||Power|
|1||Locked||ATDMA||3||5120 kSym/s||23.70 MHz||43.25 dBmV|
|2||Locked||ATDMA||2||5120 kSym/s||30.10 MHz||43.25 dBmV|
|3||Locked||ATDMA||1||5120 kSym/s||36.50 MHz||43.25 dBmV|
Arris' FAQ says that acceptable upstream signal levels should be no less than 45 dBmV:
My modem is reading a power level of 43.25. In this situation the FAQ directs me to ask my service provider to adjust the levels. So here I am, asking. Please, sir, may I have some more upstream bandwidth?
@ComcastMorgan this is extremely similar to another thread you answered: https://forums.xfinity.com/t5/Your-Home-Network/upstream-channel-power-levels-too-low-what-to-do/td-p/3195031
The solution there appears to have been a modem swap, but the symptoms were different (outages and packet loss vs. upstream bandwidth). Do you believe a modem swap would help me here as well?