I am having TP- link make modem cum router model TD – W8968. I am using internet services of M/s Vodafone through SIM enabled dongle ZTE K-3770Z attached to USB port of the router. This 3G dongle disconnects intermittently on its own due to  network strength variations. It requires to be reconnected by making off/on router. Can dongle be configured to have auto connect command whenever it gets disconnected. Please update.