Actually i recently did a bunch of reseach on dsl stats, hopefully this helps you in some way.
I used dmt to see modem stats, dl is in german, when using program can select english
DMT (DSL-Modem Tool)
Dslam locator tool. This is sort of cool, but the exact location doenst seem to be correct in some instances, i couldnt find the physical unit when i looked for it, though the distance did correspond to my attenuation. Input area code, and first 3 of telephone number.
Telcodata.US: Search by Full Area Code / Single Exchange
Some good info on low snrm
::. Kitz - Low SNR Margin & problems .::
Attuenuation is a direct result of the distance you are from the dslam, so you cant change this figure.
Higher the value the farther away you are (46db = to about 3.3 K)
There is a tool to approximate the distance but for the life of me i cant find the site.
The sync profiles available from teksavvy are: (courtesy of the teksavvy faq on dslreports)
601/75KB/sec = 6016/800kbit sync profile
601/48KB/sec = 6016/512kbit sync profile
502/75KB/sec = 5056/800kbit sync profile
502/48KB/sec = 5056/512kbit sync profile
410/75KB/sec = 4032/800kbit sync profile
410/48KB/sec = 4032/512kbit sync profile
350/75KB/sec = 3488/800kbit sync profile (rarely used now)
298/75KB/sec = 3008/800kbit sync profile
298/48KB/sec = 3008/512kbit sync profile
240/60KB/sec = 2496/640kbit sync profile
165/75KB/sec = 1728/800kbit sync profile
165/60KB/sec = 1728/640kbit sync profile
165/35KB/sec = 1728/384kbit sync profile
105/60KB/sec = 1184/640kbit sync profile
105/35KB/sec = 1184/384kbit sync profile
105/12KB/sec = 1184/160kbit sync profile
60/14KB/sec = 672/160kbit sync profile
48/48KB/sec = 512/512kbit sync profile
25/25KB/sec = 288/288kbit sync profile
14/14KB/sec = 160/160kbit sync profile
11/11KB/sec = 128/128kbit sync profile
14/8KB/sec = 160/96kbit sync profile
5/5KB/sec = 64/64kbit sync profile
Also there are 2 modes of opperation, fastpath and interleave. Fastpath is the default and optimized for low pings, interleave can be enabled to give a more stable connection.
There is a wealth of info on dslreports, as well as an official teksavvy support section.
To give you an idea of what my connection is like with teksavvy,
downstream: 5056kb, attenuation 46db, SNRM 8.5 (bounces between 14 and 8)
upstream 800kb, attenuation 28, SNRM 12