Well right I figured this would come, elaborate on the arma2oa.cfg, if I need to paste it or describe it, I know that its a configuration file.
I'm playing with 250ms ping on a server which also hosts a TS³, and while I lose connection on Arma 2, the TS³ connection remains established and uninterrupted, which leads to me being extremely sure that the problem is Arma related.
The mission file is Takistan Life, and on some days I really experience an 8 hour uninterrupted session, whereas I usually play for a short and aggravating 20 minute session, before some component of Arma 2 decides that I have had my fun and kicks me off. I did a bit of research and testing in order to discover that the cause is in someway BattlEye related, I had a friend of mine host Domination with and without BE on, in order to discover that without BE we played uninterrupted, save for his computer desyncing to itself, but that's a problem we fixed afterwards.
I believe that graphics settings are unrelated, but if relevant:
Everything on high except for the post processing and anti aliasing stuff, I deem it as unnecessary to my gaming experience.
My system runs Arma smoothly and without problems.
Intel i5-2500K OC'd @ 3.7 Ghz
nVidia GTX 550 Ti
8 Gigabytes of RAM
2 TB of HDD
Gigabyte Mobo