We have a CP860 with the 2 external mics. No matter what we try, the audio quality is horrible and un-usable. It sounds like the mics (no external/internal) are over modulated and blown, while at the same time, the audio is distant, muffled and tinnie. Ive adjust codec priorities on both 3CX and the phone itself. This wasn't a cheap phone. I know many people on here use this phone, and if all the others sound the same, I can't imagine how people could use this. Latest firmware, latest template, all 3CX updates. Any thoughts? Any recommends for a solid, great sounding conference phone? Our T48S sound way better than this junk.