The Windows-based softphone, a free VOIP and SIP phone, enables users to make calls using their personal computers. It is compatible with several VOIP providers and SIP PBXs, such as the 3CX Phone System. The software is light, user-friendly, and a full version.

One of the most noticeable aspects of the 3CXPhone is its intuitive interface, which is very similar to that of popular smartphones. This makes it easy for anyone to use, even if they've never used a softphone before. Another great feature is that it's very compact and easy to install across a network, which is helpful for businesses or anyone wanting to use it across multiple devices.
In terms of features, there's quite a few to choose from. You can record calls to a file, display caller ID, view personal call history and logs, and support for multiple SIP profiles. It also has the ability to identify incoming calls, which you can either accept or reject, and you can put calls on hold or transfer them at the click of a button. There's also Message Waiting Indication (MWI), which is a great feature if you want to know if you have any voicemails.
The 3CXPhone also has a keypad with an intuitive interface, so you can easily navigate and make calls. It supports a range of codecs including G.711 (A-Law and u-Law), GSM, iLBC, and Speex, and includes STUN support for NAT/firewall traversal. You can install it using the provided MSI file, which makes it very easy to deploy. It also comes with an integrated phonebook, which allows you to assign a caller ID to a name.
As an added bonus, the 3CXPhone can function as a client for 3CX Phone System for Windows, which is a software-based VOIP PBX that replaces traditional proprietary phone systems. This gives you even more options and flexibility when it comes to managing calls and phone systems.
Overall, the 3CXPhone is a great softphone for Windows users, with an easy-to-use interface and plenty of features to choose from. It's definitely worth considering if you're looking for a reliable and free VOIP/SIP phone.
Version 4.0: N/A
Version 6.0:
Supports Call Transfers, Multiple profiles and BLF line status updates,
Works with 3CX and Asterisk,
Works with leading VOIP providers