What are you seeing when you click "Read"? Do you know if your radio is a VHF or UHF model?

Navigate to "Optional Features" to set up: Emergency Call: Configure ENI and emergency alarms.

The PT8100 utilizes an 8-pin RJ45 microphone jack on the front panel for programming. You will need an RJ45-to-USB programming cable. For the best stability, choose a cable with a genuine FTDI chip, as cheap clones often suffer from driver compatibility issues on modern operating systems.

The matching virtual COM port driver for your specific programming cable (typically FTDI or Prolific drivers). 2. Step-by-Step Installation and Initial Setup