Compare the original with my plain English version.
Original version:
One2Talk Starter is client software runs on your computer to realize mobile usage experience on PC. One2Talk Starter enables user to make/ receive phone calls, leave voicemail, instant message and transfer file etc. The One2Talk Starter User Guide provides you with the instructions necessary to get up and running with this product. This guide also describes the capabilities of the One2Talk client, a feature-rich user interface.
After plain English editing:
One2Talk Starter is a Voice over Internet Protocol (VoIP) phone service which converts your PC to a VoIP phone. It enables you to make and receive phone calls, leave voicemail, instant message, transfer files and more.
This User Guide gives you all the instructions you need to get One2Talk Starter up and running. It also outlines the capabilities of the One2Talk client, a feature-rich user interface.

