Use your smartphone like a remote controller of your Cisco desk phone! with this app you can call any number of your smartphone contacts using your VoIP Cisco desk phone just using a simple interface, a WiFi connection and connecting directly to Your Cisco PBX, Call Manager or Unified Communications Manager.
In order to do that you need a working CUCM and ask your CUCM administrator to activate a valid application user (see documentation).
You dont need any 3rd party application server, the app connects directly to the CUCM!