3CX Mini Edition Up to 4 Simultaneous Calls License

3CX Phone System is a software-based IP PBX for Windows which replaces traditional PBX hardware phones. It is based on the SIP standard and supports standard SIP software / hardware phones.

Sangoma A101D + NetBorder Express

Sangoma NetBorder Express is a complete SIP compliant VoIP Gateway, delivering an affordable TDM to SIP VoIP Gateway card that plugs directly into a Windows based server and is fully interoperable with 3CX.