AC-MXNET-USP-CBOX Firmware Release

AC-MXNET-USP-CBOX ~ V3.43.0 ~ 04-17-2026


Notes
If your CBOX does not have USP available as a software platform to select, please see this article for instructions: How To: Convert an AC-MXNET-CBOX-HA to a 4-In-1 Software Package.

Download Link for the Latest AC-MXNET-USP-CBOX-HA Software Release can be found Here: AC-MXNET-USP-CBOX Firmware

# Release notes - USP Software - USP-CBOX V3.43.0

### New Feature


-Added audio embedding to USP Open Streaming.

### Improvements


-Expanded Media Bridge Count from 5 to 25.

-Added Serial Number column to USP-CBOX CONFIGURE page.

-Improved reliability for API Command executions when using 'ALL/ALLTX/ALLRX' arguments.

### Bug Fixes


- Fixed an issue that prevented enabling Open Streaming on a USP-PR when using the USB-C Input port.

-Fixed an issue that prevented Dante Modules not populating within the Dante Modules tab for USP-PL/PR endpoints.

-Fixed an issue that caused USP Decoders to become unresponsive upon first initial subscription change if the CBOX's internal clock was adjusted. 

- Fixed an issue that would cause intermittent dropouts to occur on RTSP streams that were bridged from the USP-CBOX CONTROL network to the USP Network(AV Network)

-Fixed an issue that would prevent USB-C Input sources from displaying an image preview within Mentor.

- Fixed an issue where enabling Media Bridge Mode directly on the CONFIGURE page would ignore Bridge Stream Capacity.

- Fixed an issue where RTSP Streams added from the AV/NETWORK were unintentially adding to the Media Bridge Capacity counter.
 
-Fixed an issue that prevented Custom Fallback Images from being uploaded if the Image contained a space within the file name.

-Fixed an abnormal data corruption issue that could rarely trigger for the USP-CBOX's configuration file under specific circumstances.

-Fixed an issue that prevented renaming endpoints within the AUTO-MATRIX page.

-Fixed an issue where MCU/APP Firmware upgrades failed to correctly populate their upgrade progress stages.

- Fixed an issue that could cause USB Subscription Routing to rarely fail to properly subscribe.

V3.42.5 Release Notes:

New Features:         

  1. Added API Command “vwid layout tx {videowall_name} {layout_name} {row:column/old_tx_id/old_tx_mac/ALL} {new_tx_id/new_tx_mac}
  2. Added new API command “config set device sourceinput {auto/hdmi/usb} {tx_id/tx_mac}
    1. Use: Modifies the source input priority for USP-PR devices. Default is “auto” (utilizes the USB-C or HDMI input based on the most recent Hotplug detection)
      1. “hdmi” == Forces USP-PR to utilize the HDMI-IN port, ignoring the USB-C port.
      2. “usb” == forces USP-PR to utilize the USB-C in port, ignoring the HDMI-IN port.

Bug Fixes & improvements

  1. Fixed the issue where the user logout button was missing from the web GUI.
  1. Fixed the issue where the web GUI was not allowing the ability to scroll using a scrollbar.

 

Known Issues:

  • Intermittent signal drops may occur if multiple RTSP streams are bridged on the USP-CBOX from the CONTROL network to AV network.
  • RTMP streams are unable to ingest a RTMPS server key.
  • USP Endpoints may fail to connect to a bridged RTSP stream if the CBOX hard power cycles and it's internal clock resets.
    • A reboot of the afflicted endpoints will regain the signal streams.
  • Custom Images will fail to upload if the file name contains a space. Please ensure no spaces are within the custom image's file name before uploading.

V3.42.4 Release Notes:

New Features:

  1. Initial Release Firmware.

Bug Fixes & Improvements:

  1. Initial Release Firmware.

Known Issues:

  1. Intermittent signal drops may occur if multiple RTSP streams are bridged on the USP-CBOX from the CONTROL network to AV network.
  2. RTMP streams are unable to ingest a RTMPS server key.
  3. No option to manually toggle between HDMI and USB-C Input for the AC-MXNET-USP-PR device.
  4. USP Endpoints may fail to connect to a bridged RTSP stream if the CBOX hard power cycles and it's internal clock resets.
    1. A reboot of the afflicted endpoints will regain the signal streams.
  5. Custom Images will fail to upload if the file name contains a space. Please ensure no spaces are within the custom image's file name before uploading. 

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