Geplante 4G/5G-Rückfalllösung für den Bahnfunk bei bestehenden Mobilfunk-Funklöchern

This question asks about plans for a 4G/5G fallback solution for rail radio communication. It specifically addresses the issue of existing mobile network dead zones and how they impact essential rail services. The question seeks to understand the technical and strategic approach to ensuring reliable communication for trains, even when standard mobile coverage is unavailable, potentially affecting passenger safety and operational efficiency.