RUN! Run as far and fast as you can from these models! With out a doubt, the biggest piece of crap Km ever produced. You would be better off finding a used C3130 or C1530.
=========================== Think of how stupid the average person is, and realize half of them are stupider than that. - G. Carlin
I still have 3 of the C850Ds out in the field, just replaced the power supply in one of them, don't get many service calls on any of them but I don't like it when I do, hopefully they will upgrade to something newer soon.