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Zyxel GS1900-48
Hardware
- RTL8393M SoC
- Macronix MX25l12805D (16MB flash)
- 128MB RAM
- 6 * RTL8218B external PHY
- 2 * RTL8231 GPIO extenders to control the port LEDs, system LED and reset button
2 Uplink ports are SFP cages which support 1000 Base-X tmini GBIC modules.
Power is supplied via a 230 volt mains connector. The board has a hard reset switch SW1, which is is not reachable from the outside. J4 provides a 12V RS232 serial connector which is connected through U8 to the 3.3V UART of the RTL8393. Conversion is done by U8, a SIPEX 3232EC. To connect to the UART, wires can be soldered to R603 and R602.
Board details
Firmware
It 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.
OpenWRT Support
There is experimental hardware support for the device in OpenWRT. SFP does not work.