You are looking at the UCC server with presence capability - it does use the toolbars in IE or Outlook:
http://www.cisco.com/en/US/docs/voice_ip_comm/cucallconnectors/1.5/client_QRC.html#wp39869
If you are looking for an attendant console type application - one option maybe to look at Arc Express. Make sure you use Arc Express 2.1 with CCA 1.9.1 for compatibility with UC520 SW Pack 7.0.2