Gateway Connection Drop


I am using the Milesight UG67 gateway with cellular connectivity. I have two different situations. First, if no node is connected to the gateway, the last activity starts to count after 2-3 hours later. I mean 2-3 hours later I see the gateway does not send data but I also see it’s connected.


Second, if I connect a node to the gateway, the connection drops within 20 mins. I see it is connected on the gateway page but there is no activity.