I am in need of a single phone line in an adjacent building (and single data line) to connect to our main office. They are right at 100m apart at the closest point (not including any length inside the building). We are likely going to use a wireless method to provide the data line. I want to know how (or if) I can add a single VOIP phone that will integrate with our current phone system. This seems like our easiest option (no physical wiring, no new lines from telco company, etc.). I don't really know much about the phone system other than it is Nortel Meridian and doesnt' support VOIP in any way.
Is there a simple conversion box that I could put on each end of the wireless link to convert phone to IP, then back again?
Do you have any other suggestions?