No door transactions coming into AMT
Transactions are not been sent by only one door.
RX and TX lights on DPU / SCU are not flashing as per other DPU's
SCU / DPU
If you have the AMT masking set correctly and the Door Editor has transaction defined for the reader entry or exit and there are no transaction messages showing up in AMT. Then one of the issues might be the Quick Poll (QP) is turned off for that DPU.
The steps to correct this issue are detailed here: Quick Poll is not selected.doc