TRENDnet TEW-811DRU

Overview

 * "WRT-C40B Rev:UC" is silkscreened on the board in the FCC photos.
 * A SK hynix H5PS1G63JFR-S6C (128MB) chip is shown in the photos.

The FCC docs specify that this FCC ID is also used for the TEW-800MB
 * (AC1200 Dual Band Wireless Media Bridge).

The TEW-800MB is also specified as an additional model in the FCC filing
 * for the TEW-812DRU (AC1750 Dual Band Wireless Media Bridge).

Reviews

 * On SmallNetBuilder
 * "0500-253411000" is silkscreened on the board.
 * A label affixed to the switched Ethernet ports casing
 * indicates the U-MEDIA model of the device is WRT-C40B.
 * CPU, Flash, RAM, and Wi-Fi IC P/Ns are per SNB.

Third party firmware related

 * TRENDnets PR announcing DD-WRT' availability

Serial Pinouts
It's the same pinout as is used by the Linksys WAP610N,
 * another U-MEDIA device.

[3.3] (GND) (TxD) (RxD)