There's a bug in the latest build of X-Lite (41150) that causes issues with SER. The client ignores registration timeout settings, and rapidly re-registers every 20 seconds with a new rinstance. Either the server gets thousands of records with your client info (most of which are invalid), or the server is configured to limit the number of registrations you can have (those are your two config options). What will happen in the latter case is that X-Lite will continue to register over and over until it hits its limit, and then, when SER tells it its hit its limit, it will time out. I've already brought it to the attention of Counterpath, and they've promised me a bug fix in the upcoming build. N. Andrey Kuprianov wrote: