Hello, I am interested to know whether we can integrate CUCM and Asterisk seamlessly. My office uses Elastix as VoIP solution and all other offices outside my country (same firm) uses CUCM. Elastix version used: 1.6 with Asterisk 1.4 integrated into it. CUCM version Used: 6.xx We have Polycom, thomson, some linksys and CISCO phones provisioned in our office. We would like to integrate the CUCM in other offices to our Elastix server. I have read on forums about 2 different methods to connect these two. 1. Using SIP 2. Using H323 We do not have any gateway concept in our office right now (For that purpose, we use a thir party for bridging functionalities. We will be shortly buying gateway for our own use). The way we read in forums, and blogs it seems the communication from CUCM to Asterisk is fine, but from asterisk to CUCM is not proper. Anyone has any experience regarding this one? What is your take on this? We might be moving to CUCM V 8.XX shortly. Also, does CUBE come into play in CUCM and Asterisk integration?