I know this has been asked before, but I didn't see an answer. Why, when I ring my softphone and hang up it still continues to ring, ie it doesn't drop the call. This has happened a few times, I rang my wifes to test it, and it was still ringing 2 hours after I had hung up. Any ideas or solutions would be appreciated. Oh and this has happened with SJphone and X-lite so doesn't appear to be a software issue.