I am trying to do test in the laboratory with callmanager 6.1 and I have the following problem: I configured the callmanager using the MGCP Protocol and I am using the directory number of PABX analogic. When I start the conversation the IP Phone (DN 3500 - IP Phone CallManager) to DN 2486 (DN PABX analogic) there is only audio in IP Phone. I verified the configuration CallManager and Gateway and didn`t find any problem. I configured the command voice rtp send-recv, but, it doesn`t solve the problem. Any Idea?