I'm on the "Blast Plus" package and when they called and offered it to me they said it was 50mbps. They never mentioned upstream but I assumed it'd be the 50/10 I had seen posted online so much. Usually my speed tests show around 36/6. Could it be that the 2 upstream channels aren't enough to support the 10mbps? I only show two upstream channels. The first is channel 1 @ 2.560Msym/sec with [3] QPSK and [2] 16QAM modulation. The second is channel 2 @ 5.120Mysm/sec with [3]QPSK and [3] 64QAM modulation. Signal levels are OK all the way around. I'm just wondering if the upstream is a limit of the local CMTS or if I should be complaining that I'm not getting the speeds I'm supposed to.
I also have the issue of sustained downloads kind of stuttering. It'll download for a few seconds at reasonable speed, then cut out for a few seconds, then go back to full speed. You can see it in the graph of the last attached image. That test finished at a whopping 24Mbps.
Edit: I'm sure it'll come up, so the modem is a SB6121.
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