Now the newest firmware version of Xenta server is 5.1.8, and the hardware version is 3. If a new Xenta server in an old project is needed to replace an old Xenta server with old version, it is not compatible with the old TAC Vista or I/NET software version of the project. So downgrade of the firmware is needed.
TAC Xenta 500/700/900
Controller with new firmware is not compatible with the old TAC Vista or I/NET software.
The controller with hardware 3 can be downgraded, but with only three versions: 5.1.6 SP1, 5.1.7 SP2 (or SP3 for X700) and 5.1.8 SP1. If any firmware other than these three versions is downloaded to the Xenta server, there will be no warning and it will be "bricked". Refer to TPA-VSTA-12-0029.00.