First, I am new with 3CX. This is my first install. Figured most of it out without any problems but I have one issue that I can not seem to solve. The system is pretty basic. 3CX Free Edition running on Windows Home Server (Win Server 2003) with 4 Snom 320s, 2 Snom 360s, 2 Snom M3 with 1 base station and a Grandstrem GXW-4101. I have looked over the manual and checked all of the obvious places but when ever a number is dialed from the 320s or 360s the system is automatically adding a prefix after the seventh number is dialed. Any ideas?