May 19, 2026
Release Date
March 1, 2018.
Firmware A6.5.5 is compatible with 2G, Omega, and certain Ultra Series model devices. For installations that require 2G, Omega and Ultra series units to work together, this is the earliest firmware that supports backwards-compatibility.
Firmware A will only be updated for situations that require 2G Series backwards-compatibility. Omega and Ultra Series devices will continue to be updated with justOS going forward.
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Compatibility
- All A6.5.5 firmware versions are compatible with each other
- A6.5.5 firmware versions are NOT compatible with versions earlier than A6.5.5
- A6.5.5 is NOT compatible with Ultra Series hardware:
- UL-707POE
- UL-707WP2
- UL-747POE
- UL-708POE
- UL-767DSS
- UL-767AES
Changelog
Additions
- SwitchPlease: switching control built into the web interface of a Just Add Power Receiver
- Plug-Play-Present: enable a Transmitter to perform switching, video wall, and power commands when it detects an active video signal
- Report audio format on a device through CLI
Bug Fixes
- Video Wall: Tearing Delay in 2G Mode was not working. This is resolved.
- Video Wall: Rectangular walls in 2G Mode were not working. This is resolved.
- Audio drop: (Transmitter) Garbage-in/garbage-out by source was being exaggerated by internal mute/unmute driver function. This is resolved and garbage will correctly pass from end-to-end unhindered.
- Memory Leak: Caused screens to randomly freeze and show a single screen of video or black. This is resolved..
- "Just Add Plaid": Occasionally, a plaid image would remain stuck on the screen. This is resolved.
Known Issues
- 2G Multicast Switching is broken. Update to FW A6.5.9 to resolve this issue.

