The radios work, sometimes for months, then just stop transmitting even though data is going in to DI correctly.
Digi denies that this happens, but I can assure you it does. I have tried three different power supplies, and even the Digi development board, with the same results. My record is four months without a failure, but on the low end just six hours. The long fail time fooled me, along with assurances that these radios can't do this, so I did a job with the new radios and had some failures. At great cost to my company all radios were replaced with the low power radios and now no failures.
There is no way to recreate this problem externally. I have tried everything. It is a bug in the Digi software. Beware of these radios. Digi tech support will not help you.