Linksys WRT54GC v1

Overview
"49000K00E" is silkscreened on the board.
 * Presumably OEM SerComm (SerComm IP806SM)

WRT54GC v1.0 serial numbers appear to start with SIJ0.

Links of Interest

 * Linksys WRT54GC on OpenWrt wiki
 * Hacking the WRT54GC Router