I'm working on upgrading my entire phone system in my office and Telecommunications is not my cup of tea. We currently using a PBX and copper lines, Voice quality is horrendous when its windy, rains, or snows. I've looked into PRI (potentially hook it up with my PBX) and VoIP, but I can't wrap my head around these 2 systems. Can anyone give me some advice or shed some light on this? Which one is being used out there? Any information is very much appreciated.