new line stats
Thank you both very much for your responses. I do live on a condo and don't have access to the demarc. I tried all the phone jacks in here, with much the same result for each.
I picked up a new modem this morning: a D-Link DSL-520B. There is quite a difference! Speed is higher (getting what I'm paying for) and SNR is higher (new stats below). But, according to the new line stats, I'm out of luck for the higher upload speeds.