Inquiry Before Buying Train Communication Gateway Systems Market Size, Share & Trends Analysis Report Product Type (Wire Train Bus Gateways, Multifunction Vehicle Bus (MVB) Gateway, and Others), by Connectivity (Global System for Mobile Communications - Railway (GSM-R), Wi-Fi, Terrestrial Trunked Radio (TETRA), and Others), and by Application (Passenger Train and Freight Train) Forecast Period (2024-2031)