Vote for 3CX Phone System for Windows

3CX Phone System for Windows is a software based VOIP phone system that replaces a traditional PBX. It supports standard SIP software / hardware phones, and allows calls to be made via a VOIP service provider or via the regular PSTN.

Key Features: Complete VOIP phone system: Provides call switching, routing & queueing; Web based configuration & status indication - Easy phone system management!; Unified messaging: Receive voice mail via e-mail; Auto attendant (e.g. 1 for sales, 2 for support etc.); Reduce long distance and inter office call costs; No more expensive proprietary phones: Use standard SIP phones; Eliminate phone wiring and improve user-mobility