Samsung CY-SWR1100

Overview
"8WRGND10.2A1G" is silkscreened on the board.
 * The device is assumed to use RT3092 for the 2.4GHz wireless interface.
 * The default SSIDs for this device are SWR1100 and SWR1100_media.
 * The default telnet credentials are Alphanetworks (user) and wrgnd10_samsung_ss815 (password).

Included PSU(s)
The power supply included with the unit is a (Samsung branded) Yang Ming Industrial DA-24B12-FAC.

Links of Interest
Pictures

Manufacturer firmware
It has long been thought that no manufacturer firmware, other than that installed, was available. But at D-Link Korea we find (2015-08-19)
 * CYSWR1100A1_FW100b29.bin
 * CYSWR1100A1_FW100b31.bin

and better still, by interpolation:
 * CYSWR1100A1_FW100b30.bin

Each of these firmwares can be uploaded from the others. Also importantly, each can be used to restore the firmware to stock after trying Padavan, OpenWrt etc., by flashing from uBoot using a serial console and tftp. (It is also possible to save stock before the first flash, from mtd2)

The three firmwares:

100b29
Significantly smaller, so presumably lacks something.

Log as built:

Linux version 2.6.33.2 (joely@enzo) (gcc version 4.3.3 (GCC) )
 * 1) 1 Tue Feb 15 10:23:37 CST 2011

Version in web interface is:

1.00 Tue 15 Feb 2011

100b30
Log as built:

Linux version 2.6.33.2 (joely@enzo) (gcc version 4.3.3 (GCC) )
 * 1) 1 Fri Mar 25 11:42:20 CST 2011

Version in web interface is:

1.00 Fri 25 Mar 2011

100b31
Perhaps defaults to a 192.168.1.1 gateway, at least that address is mentioned in its description. It is not immediately obvious whether there are any other improvements over 100b30.

Linux version 2.6.33.2 (joely@Apollo) (gcc version 4.3.3 (GCC) )
 * 1) 1 Tue Feb 21 17:06:02 CST 2012

Version in web interface is:

1.00 Tue 21 Feb 2012

Serial
Linux version 3.0.102 (padavan@hms) (gcc version 4.4.7 (GCC) ) #1 Thu Aug 21 22:23:58 MSK 2014
 * Samsung CY-SWR1100 - How to flash firmware via serial USB

Serial Pinouts
The header is JP1. The pinout seems to be the following.. (RxD) (+3.3v) (GND) (TxD)