Could anybody tell me what is likely causing the following event to be fired please? It seems to be happening every 15 minutes. 2013-12-05 12:31:29.310838 [DEBUG] switch_rtp.c:1280 [ zrtp cache]: Storing ZRTP cache to <C:/Program Files/FreeSWITCH/db/zrtp.dat>... [DEBUG] esl.c:1307 esl_recv_event() RECV HEADER [Content-Type] = [log/data] [DEBUG] esl.c:1307 esl_recv_event() RECV HEADER [Content-Length] = [75] [DEBUG] esl.c:1307 esl_recv_event() RECV HEADER [Log-Level] = [7] [DEBUG] esl.c:1307 esl_recv_event() RECV HEADER [Text-Channel] = [0] [DEBUG] esl.c:1307 esl_recv_event() RECV HEADER [Log-File] = [switch_rtp.c] [DEBUG] esl.c:1307 esl_recv_event() RECV HEADER [Log-Func] = [zrtp_cache_save_ca llback] [DEBUG] esl.c:1307 esl_recv_event() RECV HEADER [Log-Line] = [1141] [DEBUG] esl.c:1307 esl_recv_event() RECV HEADER [User-Data] = [] [DEBUG] esl.c:1470 esl_recv_event() RECV MESSAGE Event-Name: SOCKET_DATA Content-Type: log/data Content-Length: 75 Log-Level: 7 Text-Channel: 0 Log-File: switch_rtp.c Log-Func: zrtp_cache_save_callback Log-Line: 1141 Content-Length: 75 2013-12-05 12:31:29.342010 [DEBUG] switch_rtp.c:1141 Saving ZRTP cache: OK 2013-12-05 12:31:29.342010 [DEBUG] switch_rtp.c:1141 Saving ZRTP cache: OK I am trying to get a PBXwithH323 -> Yate server -> FreeSWITCH SIP working and am trying to work out what's happening. Richard