Smoothly running and Always update. Support almost OS, easily to train to new user. Easily to intergrate into any system by API.

I had several softphone programs on my PC before. Unfortunately, none of them could handle multiple SIP accounts. Softphone.Pro, on the other hand, is very good, better than the others. Over the years, I have rarely had any issues with it. It always runs smoothly, has a nice, intuitive interface, and is easy to use. Sometimes, a SIP account fails to connect to the server or loses the connection. This may not be Softphone.Pro's fault, as all the apps had this issue. It would be nice if it could be indicated right away on the Windows taskbar icon. Overall, it's a very fine program.

it's simplicity and the design also the backpanel is also good for setting up and listening to the calls.