I am transferring the current session to mod_callcenter like this: $session->transfer("47673503","XML","public"); where 47673503 is the extension number for the callcenter. The call is getting hungup as soon as the program sees the above line. The console shows this: 2013-07-15 11:38:04.221516 [DEBUG] switch_ivr.c:1815 (sofia/internal/ 5000@10.1.30.236) State Change CS_EXECUTE -> CS_ROUTING 2013-07-15 11:38:04.221516 [DEBUG] switch_core_session.c:1340 Send signal sofia/internal/5000@10.1.30.236 [BREAK] 2013-07-15 11:38:04.221516 [DEBUG] sofia.c:5741 Channel sofia/internal/ 5000@10.1.30.236 entering state [completed][200] 2013-07-15 11:38:04.221516 [DEBUG] sofia.c:5741 Channel sofia/internal/ 5000@10.1.30.236 entering state [ready][200] 2013-07-15 11:38:04.221516 [DEBUG] switch_core_session.c:860 Send signal sofia/internal/5000@10.1.30.236 [BREAK] 2013-07-15 11:38:04.221516 [NOTICE] switch_ivr.c:1822 Transfer sofia/internal/5000@10.1.30.236 to XML[47673503@public] 2013-07-15 11:38:04.221516 [DEBUG] switch_cpp.cpp:844 transfer result: 0 Please help. -- Ashish Gautam