I don't know DU connections, to be honest.
But I heard it doesn't require a modem/router.
If this is the case then any wirless access point should work.
You would connect the AP via network cable (RJ45) and then your computers will connect via wireless.
Set the AP to receive DHCP settings, and create NAT (a seperate network internally).
Enable DHCP for the internal network.
Note that RJ45 is network, RJ11 is phone.