ETSI has published a new version of EN 300 392-3-15 V1.5.0 for TETRA systems. The update is part of the Inter-System Interface (ISI) series and specifies functions for communication between different TETRA networks.

The revision includes updates and clarifications to the service specification within Part 3, which defines how TETRA systems interoperate in a networked environment.

It also strengthens the structure of the standard and supports the continued development of cross-network TETRA communication.

You can find the document here: EN 300 392-3-15 V1.5.0

All feedback and comments are welcome by 1 July 2026.