On Thursday 01 November 2007, Gerson A. Matiolli wrote: > Hi, all > > I am using Openser 1.2.2 - tls. > > I have 400 registered users. > > Everything works well as traffic is low. > > If traffic is high, the calls are not completed (Busy tone) > > Can anyone help me? Hello Gerson, 400 users should not cause a problem, if you run OpenSER on a normal server system. Have you checked the server logs about any error messages? Search for errors indicating a low memory condition or a memory leak. What type of SIP error message the server returns to the phones? Use tcpdump and wireshark or ngrep to capture and analyse a trace of the problem. Cheers, Henning