This KB explains how to pass outbound Caller-Id Name, but to get what you want you just need to apply CU3 to all roles and clients
support.microsoft.com/.../972721
Currently we are at CU6, so just apply these updates to your Server Roles (FE, Mediation, Edge, Back End and Clients).
www.microsoft.com/.../details.aspx
For Server install the ServerUpdateInstaller.exe, Back End needs to be updated with OCS2009-DBUpgrade.msi. Also make sure you are running the latest client, as it is needed to support the Caller-Id Name.
Geoff