Faculty and staff must have a Cisco desk phone to use Jabber, and also must request an account. This software is different than the Movi client; if you are looking for Movi, it is now located on the Deprecated Software list here: https://www.brown.edu/information-technology/software/catalog/deprecated
With Jabber, you can bring your Brown phone number with you, even if you're away from your desk. Jabber is a unified communications application for Windows, Mac OS X, and mobile devices. It'll let you make and receive phone calls, conduct encrypted chats to others who are logged into the system, and search the Brown directory.