In a perfect world, this would have been posted here:
A moderator may move it there. In the meantime, Let's try to figure out what's happening.
There aren't a lot of tones there. What are the port rates [downstream, upstream]? The stats look OK, for whatever port rate you're synced at. Line attenuation is on the good side of average.
There are many factors which can affect DSL. If you give us more information to work with [what's the problem, what are the symptoms, when does it happen and how frequently, etc.], someone may get an idea as to what's going on, and whether it's your problem or Centurylink's.
Here are a few places for general info on DSL troubleshooting:
»AT&T Southeast Forum FAQ
»I'm not getting the advertised DSL speeds. What's wrong? What can I do?
Just ignore any references that aren't relevant to your ISP.
Now that I've looked around a bit more, it seems you're lucky enough to have 'official' support techs who post in your forum, unlike Earthlink customers. Here's the contact info:
»Who are the Official CenturyLink Techs that Post Here?