Everybody likes something for FREE, what about a free of charge software based SIP Server which allows you to create a VoIP network at no cost at all, utilize your customers existing LAN infrastructure, POE connectivity and a spare PC.


CyberData Intercom SIP-enabled IP endpoints are certified after successful interoperability testing by: 3com, 3CX, Alcatel Lucent, Avaya, Cisco, Microsoft-Lync, Mitel, NEC, Nortel, Panasonic, Toshiba + 20 other leading VoIP manufacturers. When registered to a SIP Server, the IP Intercom can speed dial and dial multiple extensions. You can also utilize more advanced features.


3CX ‘Phone System’ is a FREE VoIP IP PBX for Windows / SIP server software for Windows that allows you to easily set-up a professional, modern phone system for your customer.



  • Use popular VoIP providers and SIP trunks for low cost calling
  • Use popular IP Phones (Yealink, snom, Cisco & others) or Softphones
  • Keep using your old telephone lines with the use of VoIP gateways
  • Runs on Microsoft Windows – no need to dedicate a PC or learn Linux! Eliminate phone wiring
  • Includes enterprise phone system features such as voicemail, auto attendant, unified communications and more


3CX Phone System FREE edition is a fully functional product, it supports an unlimited number of extensions and does NOT time out. It is supported only via the 3CX Forums.


3CX Phone System IP-PBX Brochure


FREE and Ideal for Cyberdata SIP Intercoms