Just to give a little background. I am a bio/chem teacher at a relatively small charter school who inherited the IT position (along with other duties) when our IT guy left. He thought I'd be able to do the job...I think he overestimated my ability. In any case, we are working with an OfficsServ 7200 system for our phones. We have a few that need to be swapped out. We bought used and now I'm having a problem programming them on our system. I'm fairly certain this is due to incompatible firmware. We're running in the 70's the refurbed phones are running in the 30's. I tried to update...failed. I tried using a TFTP server...again no joy. Admittedly, this may be due to my lack of know-how. In any case, I was hoping maybe some of you had some ideas of what I might be doing wrong and how I might correct this. Thanks in advance.