The Decibel real-time messaging framework, which has now reached version 0.5, combines CTI, VoIP, chat and other instant messaging solutions. As a D-Bus-based API it also complies with the Telepathy specifications and provides interfaces to KDE applications without integrated telephony or chat functions. From the user's point of view, Decibel provides a standardized control center for all accounts, connections and settings in the real-time communications field.

Just a few days later, Kcall 0.7 was released, the first port of an application with Decibel support for KDE 4. Kcall is a telephony client which integrates with Kontact and uses its phonebook giving KDE users the ability to establish connections by clicking on a phone number in the address book. Kcall outputs ring tones or pops up a dialog to signal incoming calls via VoIP, for example. Connection data and accounts are managed by Decibel.