Zyxel GS1900-48HP
The GS1900-48HP is a 48-port managed Gigabit switch, of which 24 ports are PoE-capable.
Hardware
Main board
- RTL8393M SoC
- SK hynix H5TQ1G63EFR (128MB DDR3 SDRAM)
- Macronix MX25L12805D (16MB flash)
- Sipex 3232EC RS232 level converter
- 6 x RTL8218B PHY
- 2 x RTL8231 GPIO extender
PoE board
- PoE controller: STM32F100
- PSE: 6 x Broadcom BCM59111
Serial port
The RS232 serial port is available on header J4, which matches a standard IDC10 pinout:
- J4.2: RX
- J4.3: TX
- J4.5: GND
A system reset switch (SW1) is reachable through a vent hole.
Board Pictures
| Board | Pictures |
|---|---|
| Full board setup |  |
| Main board |  |
| PoE board |  |