We purchased a new VoIP phone system, Do I need new Call accounting software?

Not with WinCall®.  WinCall® is compatible with all PBX's. When you upgrade your PBX to a newer VoIP system, your WinCall® software does not change.  Some vendors today require clients to upgrade or purchase new call accounting software which can be different and cost thousands of dollars to upgrade. 

We have clients running both analog and VoIP switches throughout their network utilizing a single WinCall® system.