The switch is a 24 + 2-port Gigabit L2 switch with 24 gigabit ports. This model is part of the DGS-1210 series line-up.
2 Uplink ports are SFP cages which support 1000 Base-X mini GBIC modules
Power is supplied via a 100-240V Type C13 connector.
A unpopulated serial header is found at J6. Pins are Vcc(3.3V, Square), TX, RX and GND. Serial connection is via 115200 baud, 8N1.
There appears to be a unpopulated 14-pin JTAG available at J5.
The switch ships with a bootloader based on Realtek's SDK for RTL83xx SoCs and Linux 2.6 based on Realtek's SDK. It has a web interface for all management functions.
Support will be added soon as it should be an easy change based on other switches in the DSG-1210 series.