My Dlink DPH-541 WiFi phone doesn't ring in response to inbound\ncallers after a certain amount of time. I just verified that it stops\nresponding after 2 hours although it might have stopped responding\nbefore that. When I open the clamshell it shows that it is registered,\nbut I have to Restart the phone to get it working properly again. What\nparticularly frustrates me is that this problem didn't happen at all\nwhen I used Callcentric as my SIP provider.\n\nI'm currently using Sipsorcery tied to my Gizmo5/GoogleVoice SIP\naccount. Sipsorcery has a Keep Alive option that I activated. I set\nthe Register Expiry in both Sipsorcery and Gizmo5 at 3600 seconds and\nthen to 60 seconds, but it makes no difference. This problem happened\nwith Gizmo5 even before I used Sipsorcery. Any assistance or ideas to\nhelp this situation will be greatly appreciated. Thanks.