3CXPhone is a free VoIP phone that allows you to use your PC or laptop as a phone. Connect 3CXPhone to a VOIP provider or to a VoIP PBX (for example 3CX Phone System) to make calls to any VoIP, mobile or landline number. With 3CX Gateway for Skype you can even make and receive calls to Skype numbers!
3CXPhone is based on the SIP standard and developed by 3CX, which pioneered Windows VoIP technology with the innovative and award-winning 3CX Phone System for Windows.
Installing 3CX VOIP Phone is easy and only takes a few minutes. Download it here and start enjoying the benefits of VOIP telephony!
3CXPhone is a free VOIP/SIP phone that can be used with popular VOIP providers and SIP PBX systems. The interface is easy-to-use and resembles that of an iPhone and includes features like call transfer, call recording, hold, headset support, personal call history, integrated phone book, and more. 3CXPhone offers support for G.711 (A-Law and u-Law), GSM, iLBC and Speex codecs as well as NAT/firewall traversal. A detailed PDF manual is provided on the website.
Features:
* Choose from several popular phone interfaces (Nokia, iPhone)
* Multi-line ability (up to 3 lines)
* Ability to transfer calls
* Record calls to disk
* Shows personal call log/history
* Supports G.711, GSM, iLBC and Speex codecs
* Works with 3CX Phone System, Asterisk and popular VoIP providers
* Easy to deploy and manage in a computer network
* Supports standard USB and Plantronics headsets
* Environmentally friendly and FREE!
3CXPhone is a SIP Phone with a user-friendly and intuitive interface. 3CXPhone features:
* Intuitive Apple iPhone or Nokia like interface
The intuitive interface will be instantly familiar for many users because it looks and behaves like a mobile phone. Users can choose between an Apple iPhone or a Nokia interface
* Completely free
3CXPhone is provided totally free of charge to individuals and organizations including commercial entities. All features (including call transfer) are enabled. This makes it easy for companies to deploy it on any Windows desktop without having to worry about cost or license administration hassles.
* Remote extensions are easy with the 3CX Tunnel
3CXPhone can easily be configured as a remote extension, allowing users away from the office to easily connect to the corporate phone system. The unique tunnel feature proxies all SIP & RTP traffic over a single port and makes firewall and NAT configuration a breeze. It is also possible to configure it as a remote extension using 'direct SIP'.
* Ability to record calls
3CXPhone can record calls to disk at the click of a button. Calls will be recorded in the popular Wav format.
* Environmentally friendly
Software SIP phones are installed on an existing PC or laptop and therefore save on electricity.
Other features:
* Intuitive iPhone or Nokia like interface
* Lightweight and fast
* Supports XP, Vista, 2008 and Windows 7
* Ability to transfer calls
* Ability to put calls on hold
* Supports up to 3 lines
* Supports several SIP profiles
* Displays caller ID
* Shows personal call log/history
* Popup for incoming calls - identify, accept, reject or ignore
* SIP phone that properly supports SIP RFC standards
* Supports standard USB and Plantronics headsets
* Support G.711 (A-Law and u-Law), GSM, iLBC and Speex codecs
* STUN support for NAT/firewall traversal
* Installation provided as MSI for easy deployment
3CXPhone is a free softphone that allows you to make and receive phone calls via your computer. To operate your 3CX VOIP softphone you will need:
* A VOIP provider / SIP server connection
* A PC / laptop / notebook running on: Windows 2000, XP, 2003, Server or Vista
* A broadband internet connection
* A headset with a microphone and/or sound card
3CXPhone benefits:
* Quick and simple installation
* Open Standards based next generation softphone
* Easy to use, intuitive user interface with dial pad and buttons
* MSI installation allows for easy network wide installation
* Completely free - saving licensing costs and licensing administration
* Supports use of headsets
* Can be used as an IP phone replacement
* Environmentally friendly - Softphones save electricity!
* Substantial savings on telephone bills
* Developed by 3CX: an award-winning and experienced company in the field of telecommunications program and developers of 3CX IP PBX
3CX softphone for Windows also works as a VOIP Client for 3CX Phone System for Windows, an award winning IP PBX that helps businesses break free from obsolete proprietary hardware based PBXs. Read more about 3CX Phone System.
A complete 3CX Phone System for Windows consists of the server software, soft phones or SIP hardware phones, and a VOIP Gateway to connect your existing phone lines. A VOIP provider can be used to leverage low cost calls across your user network.
The system can use the existing computer wiring (and share the network point with the computer) and can be installed on an existing, non-dedicated Windows server (no need for Linux!) or run as a virtual machine. Say goodbye to expensive, proprietary, phone system expansion modules and costly phone bills!

The license of this software is Freeware, you can free download and free use this internet phone software.