It helps to have a phone that is not the computer you are working on. At least for me that excludes any tablet I have on hand (if I have it nearby, there's probably something there that I should read). I didn't think about using smartphones - bring your own SIP endpoints for work, could be nice.
Agreed. A coworker of mine rolled back to a restore point, which caused his computer to get kicked off the domain. He couldn't log in at all, so he had to call IT. The problem was his phone was a softphone on his computer.
Not sure if we have 2 drops per cube. There's 2 ports, but I don't know if they're active, cabled but not hooked up to a switch, or not even run to the cube. Haven't bothered to test because our old Cisco phones had a pass-through port, and now I only have 1 device that could use an ethernet port.