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Netgear GS728TPv2
The Netgear GS728TPv2 is a 24 + 4-port Gigabit L2 switch with 24 gigabit ports. 4 Uplink ports are SFP cages which support 1000 Base-X tmini GBIC modules. It has an RTL8391M SoC. There are 3 RTL8218B PHYs and an unknown PHY for the SFP cages. One RTL8231 GPIO extenders controls the port LEDs of the SFP cages. Power is supplied via a 230 volt mains connector, with an internal power supply for 12 and 54 Volt. The board has a hard reset switch SW1, which is is not reachable from the outside. CN1 provides a 3.3V UART, the pins are marked. From CN1 a cable leads to a conversion pcb for a 12V RS232 serial connector, which is accessible on the router's back.
The 2 fans of the device are controlled by an MSP430 microcontroller: MSP430FR2311
A Nuvoton M0516LDN on the a PoE control board controls 3 BCM5912100.
A USB port provides USB 1.1 via a Maxim MAX3421E USB Peripheral/Host Controller with SPI Interface.
It ships with a bootloader based on Realtek's SDK for RTL83xx SoCs and Linux 3.18 based on Realtek's second generation 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, nor does USB and fan control.
PCB
There are 5 PCBs, a main PCB, a power supply, a PCB for PoE, a UART-RS232 converter, and a smaller PCB for Leds, USB-port and buttons.
Overview of the main PCB:
The PoE PCB:
The following are details of the main PCB:
