zyxel_gs1920_series

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Zyxel GS1920 series

The GS1920 series is a line of managed gigabit ethernet switches. Two revisions exist, but both are built with Realtek hardware.

Switch name RJ45 ports Combo SFP ports Dedicated SFP ports PoE ports
GS1920-24 28 4 - -
GS1920-24HP 28 4 - 24
GS1920-48 48 4 2 -
GS1920-48HP 48 4 2 48
GS1920-8HPv2 10 2 - 8
GS1920-24v2 28 4 - -
GS1920-24HPv2 28 4 - 24
GS1920-48v2 48 4 2 -
GS1920-48HPv2 48 4 2 48

Hardware

  • SoC: RTL839x
  • Ethernet:
    • 3× RTL8218 (to be confirmed)
    • 1× RTL???? (combo ports)
  • RAM: Nanya NT5CB64M16FP-DH, 128MiB DDR3
  • Flash: Macronix MX25L1283F, 16MiB SPI NOR
  • PoE controller: STM32F100
  • PoE PSE: 6× BCM59111
  • GPIO: 4× RTL8231
    • HC164 shift register for device status LEDs
  • ADT7468 thermal controller with 3× 3-pin fan
  • Sipex SP3232 RS-232 transceiver

The serial port header J2 uses the standard DCE pinout, with TX/RX on pins 2 and 3, and ground on pin 5. Port settings are 9600 baud, 8n1, with ±5.6V logic levels.

Photos

Board Pictures
Overview device front inside overview
Main board main board overview main board SoC and memory main board GPIOs main board fan control main board serial port and SFP cages main board backside
PoE daughter board PoE board PoE controller ICs PoE board backside
  • zyxel_gs1920_series.1603705655.txt.gz
  • Last modified: 2020/10/26 09:47
  • by svanheule