Why isn’t my ISP showing a link on WAN1 or WAN2 on the BLR-108 router?

If after you connect a BLR-108 router to a WAN port you don’t see the lights indicating an active connection, check which WAN port is being used. The BLR-108 only supports auto negotiation on ports WAN1 and WAN2 since they are combo RJ-45/SFP ports. It does not support hard-coded links of 10/100mbps on those ports. In this case, connect the cable to ports WAN3 or WAN4.