Free VOIP / SIP phone (softphone) for Windows. Works with popular VOIP providers and SIP PBX's (including 3CX Phone System, Asterisk and many more). The interface is easy to use and similar to that of popular Smartphones. 3CXPhone is compact and easy to install across a network. Features include Call Transfer, Call Recording, Hold, Headset support, Call History.
What's new in this version:
Version 4.0 features new smartphone like interface; multi-line support; online help manual; multi-lingual support (German, French, Italian, Spanish).