This is a Windows program to read out some data from Motorala Tetra devices through the PEI interface. Main thing is to monitor RSSI value. Tested with my MTM5400 Radio, so I can’t guarantee that it will work with your radio.

used AT commands (only read commands)

  • ati
  • at+creg?
  • at+ctom?
  • at+gcli?

Since my next TMO repeater is >30km away and I can use only indoor antenna, I needed a way to monitor the RSSI value to optimize my antenna. I went from a dipole to a moxon antenna for now.

This is the initial web site to have a place for a download link. Further documenation will come later.

  • v1.0.0.0 - 6-MAY-26 - Initial Release
  • v1.1.0.0 - 9-MAY-26 - add Carrier and LAC
TetraCat_v1.1.0.0.zip