In India, we have regular power outages, say twice or thrice a day. We, however, have 100% generator backup where I live. The problem is this – my modem connected to power through a UPS disconnects and reconnects when there is a power outage. UPS seems to have continuity otherwise. PC and monitor have full continuity.
But here is the most crucial part – modem is also continuous when I switch off power from the socket connecting power to the UPS. Discontinuity occurs only in modem and only when there is power outage. Not when power is switched off locally.
Can anyone tell me what might be happening? It is a Huawei DSL broadband modem. Also, there is a surge protector between modem and UPS.