When I first got my 770 I had a cheap old "Pheenet" 11 Mbps (WEP) router. Later on I disabled the Wifi part and kept it as a router/NAT/firewall/LAN switch. Added an entry-level Netgear WG602 54Mbps AP with WPA.

The tablet has always worked fine with both, in DHCP or fixed-address mode. Always connects first try, and connections are very stable.