The 3CX VoIP PBX for Microsoft Windows can completely replace traditional telephone switchboards. Based on the SIP Standard it is possible to use almost any SIP-based phone (Software as well as Hardware).
Benefits
Use of existing LAN cabeling
Broad range of vendor independent SIP-Phones
Low cost of calls over SIP-based VoIP-Services or WAN-Connections
Flexible Licensing
Integration of existing analog and ISDN Phone-Lines over VoIP-Gateways
