This firmware had fatal flaws. If you are experiencing audio/video issues and are on this firmware, you MUST update firmware before any troubleshooting.
Release date January 12, 2017
Added in firmware A6.4.12
Support for 2GΩ/3G Receivers and Transmitters - models 505PoE and 705PoE
Support for 2GΩ/3G+ Receivers and Transmitters - models 515PoE and 715PoE
Support for 3G Receivers and Transmitters - models 508PoE and 707PoE
Support for HDR pass-thru with the ability to turn HDR off on a per-TV basis Note: HDR requires that the 3G Receiver scaler be set to "Pass-Through" mode
Upgraded EDIDs for all 3G models
Model numbers now displayed in title bar and Image Pull section of web interface
Support for Image Pull in rotated panels (90, 180, and 270 degrees)
Ability to set 3G units into 2G Mode to communicate with 2G devices (removes all 3G features and functionality)
2G+4+ Tiling Transmitter enhancements (requires separate microprocessor update as well)
Various video enhancements and fixes
Download link includes firmware files, supporting programs, and documentation.