Pls Google to understand more:
This is a very limited 2 in 1 router & modem.
Unifi, Maxis, Celcome, Time & Streamyx
BUILD IN MODEM for buildings that uses RJ11(phone line)
DSL = ADSL2/2+, ADSL, VDSL2, fiber.
2 in 1 WAN port supports:
RJ11 = Phone line from wall socket
RJ45 = Direct fiber => modem => this unit
RT = Router (AC1900):
Powered by 5th Gen Broadcom chip.
Could handle heavy traffic of multiple devices
Asus Ai Mesh, 2 unit could cover the size of a warehouse (I've got another unit of RT86U-non DSL RM250.00)
U = USB3.0
This port usable as network storage or printer.
Whatever an average user need this unit could handle it all. Once U go Asus, U won't turn back