need help understanding slow when I pay for 16mb business HYPERFAST when paying for 50mb

You do have one downstream channel that is slightly out of spec and  your downstream SNR is out of spec on a few channels. It should be 35 or higher which makes only four channels actually in spec, but not  by much. Do you have a splitter before the modem? If so, try removing that to see if it helps.  If it doesn't, I'd recommend asking for a tech to come out so he can look at the levels as they are a bit inconsistent.

hey krase

thanks for your input

there are two reports the first is when I was at 16mb and the second when I was at 50mb.  I am a little suspicious of this whole thing.  I wasn't using the connection at all at 16mb ( I turned off everything and hooked the pc straight to the modem) and when I was paying for 16mb my speedtests ( speedtest.net) always read 4-5 mb down. SO comcast blamed the modem (sb6141 brand new) .  They ran a provision test and came to the conclusion that I was using all my bandwidth ( remember I had ONE machine on the modem and I know EXACTLY what it is up to) 

SO they upgraded the link to 50mb and sure enough ALL IS PEACHY !!!  ( remember it's the same modem, remember how it was a problem before BUT not now at an extra $50 per month!!!!)

In short this looks like a little throttling was going on and that is a BIG no no. I just had lunch with the Chicago Trib guys and they are interested in looking into this as the package ( starter package 16/3mb) is being touted to startups and it clearly has issues.

thanks again

It could be that the boot file on the modem was messed up in some way, but it's hard to say. Have you re-downgraded yet to see if the original issue comes back?

Nah, Comcast does no throttling. Kraze was right. You have signal issues. Both of your posted levels look similar, particularly the high error counts; they are much too high, particularly on the first 2 channels. I would recommend calling into support on this one if you haven't already, though I am aware it can be tough to get Comcast to investigate "marginal" problems like yours, versus the real bad ones (no connection, loss of sync, etc.)

thanks Train_wreck for your great counsel. I have had three techs come over and ALL have reported the situation AND escalated it.  It is VERY strange to me that it works at $100 per month ( 50 mb ) and NOT at $70 per month!   the Chicago Trib have mentioned that they are interested in this case so we will see where that leads. The issue here is that this package is been touted as a ideal for an "Internet startup package" and Chicago needs all the help it can get in that arena.  If our startups are been induced to upgrade throwing money at a problem like this when the issue is poor infrastructure provision by the vendor, then that will be a fairly serious issue. It is somewhat fortunate that we have a new Mayor and one that understands these things. Thanks again