This user manual is intended to describe the contents and use of the Ring KDE Client 1.1.0 softphone. Ring KDE Client is a KDE client for Ring. It communicates with the core side, Ring daemon, through D-Bus. Ring is meant to be a robust enterprise-class desktop phone. It provides functions like call transfer, call hold, multiple lines, multiple accounts support. It is SIP and IAX2 compatible. Ring audio layer is built upon a native ALSA interface and a native PulseAudio interface.