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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 * SKhynix H5TQ1G63EFR * Macronix MX25L12805D * Sipex 3232EC RS232 level converter * 6 x RTL8218B PHY * 2 x RTL8231
PoE board
* PoE controller: STM32F100 * PSE: 6 x Broadcom BCM59111