Hi, I'm new to FreeSWITCH lists and I'm not sure if this is the correct list for my post, any help will be much appreciated. I have a FreeSWITCH server configured to connect to a Draytel (draytel.org) SIP service. This works correctly and I can dial in and out using the service. I have an application running on a Windows Server that interfaces using event socket to the FreeSWITCH server. The intended use is that calls dialling in through the draytel service are automatically handled by this application. Again this works correctly. However, after a period of time which does not yet appear to be deterministic the FreeSWITCH server stops responding to INVITE requests from the draytel server. The FreeSWITCH server can still respond as I can dial using a local network VOIP phone and the application handles that call, but on the draytel connection there is no response. When FreeSWITCH stops responding I see absolutely nothing in the output logging information. I have run WireShark on the server that is running FreeSWITCH and I can see SIP INVITE requests being sent from draytel to the FreeSWITCH host but I don't see any kind of response. Help! Thanks Chris.