Here's an example of the messages I get when I issue the sendevent command. Nothing happens on the SIP session. { "Command": "sendevent NOTIFY", "profile": "external", "content-type": "application/simple-message-summary", "event-string": "check-sync", "user": "447700900...", "host": "sip.d…………com", "content-length": "2", "Event-UUID": "355b411b-4a7f-43ad-9b17-3a2f2835c4e7", "Event-Name": "NOTIFY", "Core-UUID": "e97dd287-7ae3-4099-8119-f36ec097ca5d", "FreeSWITCH-Hostname": "spare3", "FreeSWITCH-Switchname": "spare3", "FreeSWITCH-IPv4": "83………….", "FreeSWITCH-IPv6": "::1", "Event-Date-Local": "2013-07-24 09:32:50", "Event-Date-GMT": "Wed, 24 Jul 2013 09:32:50 GMT", "Event-Date-Timestamp": "1374658370308320", "Event-Calling-File": "mod_event_socket.c", "Event-Calling-Function": "parse_command", "Event-Calling-Line-Number": "2139", "Event-Sequence": "9710", "Content-Length": "2", "_body": "OK" } By the way, looking at Wireshark I see that Blink subscribes to application/simple-message-summary and receives 202 from FS. Occasionally FS sends a message waiting update, so I can see that the notification system is somewhat working. Regards, Martyn