Wow that's a lot of FEC errors if it has only been up for 1/2 an hour.
I usually see that many after a week on my line last time I checked.
I would ask to have your max connection speed limited to 17 or 15Mbps down and see if that helps.
You could also ask them to switch you to a different Dslam if they can. Dropping your speed a little bit may allow you to switch to fast path which will give you a better connection over all as well. (Latency wise)
FEC, HEC, and CRC errors types are a little confusing so here is some reading:
»en.wikipedia.org/wiki/Forward_er ··· rrection
»en.wikipedia.org/wiki/Header_Err ··· _Control
»en.wikipedia.org/wiki/Cyclic_red ··· cy_check
Basically the high FEC error rate points to a noisy line. Basic troubleshooting you can do:
Do you have filters on every phone jack? sometimes adding a filter even if there is nothing plugged can be helpful.
Does the phone line pass along side a power cable? (crossing is fine laying along side is not)
Does the phone line pass by any large AC motors such as fridge, freezer, or other large type load such as florescent light's ballast, microwave, electric stove or oven etc?
How far away from the NID is your modem? (actual cable length is helpful)
Have they replaced the wires from the network box on the street to your nid or have they been checked that they are in good shape?