Argus Technologies EW2104

Datasheet (via archive.org), Manual (via archive.org)

This device actually uses a 10/100 Ethernet controller for the WAN, unlike almost all other S3C4510x based routers from this era.

This device uses a EPIC Ei16C550 (Ei16C550-CJ44) FIFO UART to provide for the DE-9 serial port on the back of the unit.

This device uses an Altera EPM3032ALC44-10 (MAX 3000A PLD).

"AGS200117" and "Ver: 1.0" is silkscreened on the board in the FCC photos. "GEMTEK", "2100700801", and "WL-216" is silkscreened on the wireless module.

This router was also sold as the..
 * Hawking WR254S (OUI: 00:03:0A [Argus Technologies])

The manual shows the sample value in the ESSID field to be Wireless. As this SSID is very common with the 00:03:0A (Argus Technologies) OUI, it can (probably) be safely assumed that the default SSID of the device is indeed Wireless.