MCI Adds Windows Messenger to its Converged Communications Service

MCI is adding Microsoft Windows Messenger to its MCI Advantage (formerly known as the WorldCom Connection) converged communications service. Both Windows Messenger and the MCI Advantage support SIP. With the new Windows Messenger capability, MCI Advantage business users can complete and receive voice calls, participate in real-time chat sessions and share information with colleagues directly from their desktop or any SIP enabled device. Users can also take their MCI Advantage service and calling features with them to any location by connecting to an MCI IP network.
http://www.mci.com