Many moons ago, my colleague David Hailey and I put together a few quick write ups on SIP endpoints with CUCM and iPhone SIP Clients. I recently bought an Android phone (Droid Incredible) and one of the items on my list of “things to do” is testing out SIP clients on the Android OS. I have started testing with two applications, Sipdroid and CsipSimple. In this article we will discuss how to register CSipSimple to Cisco Unified Communications Manager (CUCM). Sipdroid is covered separately.