AC-MXNET-USP-ES-B Latest APP + MCU Firmware

AC-MXNET-USP-ES-B ~ APP Ver V1.2.3.9 ~ MCU V0.28.0 ~ 09-03-2026


Notes
Please ensure your endpoints are greater than APP Version V1.2.0.7 before proceeding.
The recommended update procedure for the USP product line is as follows:
  1. Upgrade the USP-CBOX to the latest firmware available.
  2. Upgrade the USP Endpoints to the latest APP Firmware available.
  3. Upgrade the USP Endpoints to the latest MCU Firmware available.
    1. If upgrading from APP V1.2.2.5 to APP V1.2.3.9 or later, factory reset the updated endpoints after upgrading the MCU.

Latest AC-MXNET-USP-ES-B APP + MCU Firmware can be downloaded here: AC-MXNET-USP-ES APP + MCU Firmware

# Release notes - USP Software - USP-ES-B APP V1.2.3.9 / MCU V0.28

Key Features

  1. First production firmware release — Hardware revision -B of existing AC-MXNET-USP-ES product with support for interlaced formats. includes the complete current USP-ES feature set (playlist management, scheduled synchronized playback, adjustable preview streams, and more).
  2. Automatic HDMI I/O chipset firmware recovery — the device remains responsive and self-heals without manual intervention.
  3. Improved HDMI decoder lock and recovery during HDCP and source changes, with multichannel (up to 8-channel LPCM) HDMI audio capture.
  4. Corrected HDMI output HDR signaling for accurate color on connected displays.
  5. Improved HDMI input recovery after hot-plug resets, with accurate Ethernet link LED behavior.

Full changelog list can be found here.