I knew I could count on the great help of this forum. Thank you for all the findings and recommendations. Now that we established that the cabinet is indeed a Huawei make,
Should I just go with the HG612 VDSL2 modem or get theTP-Link W9970 suggested by MrSaffron? They both cost roughly the same though I already have a decent router. Would there be any difference in terms of the speed/stability/latency, or even some complications pairing it with my 7800DXL?