====== 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 | {{:wiki:zyxel_gs1900-48hp_full.jpg?400|}} |
| Main board | {{:wiki:zyxel_gs1900-48hp_main.jpg?400|}} |
| PoE board | {{:wiki:zyxel_gs1900-48hp_poe.jpg?400|}} |

====== References ======
  * [[https://download.zyxel.com/GS1900-48HP/datasheet/GS1900-48HP_17.pdf | Datasheet]]
  * [[https://www.zyxel.com/us/en/support/DownloadLandingSR.shtml?c=us&l=en&kbid=M-01612&md=GS1900-48HP | Product page]]

{{tag>zyxel-gs1900}} {{tag>jtag}}