Leveraging multi-mode converged communication technology, this solution integrates satellite communication, public network intercom, BeiDou navigation, and emergency SOS functions to establish an "air-space-ground-sea" all-domain coverage network, breaking through the geographical limitations of traditional terrestrial communication. Long-distance communication is evolving toward "all-time, all-region, high-resilience, and enhanced emergency response" capabilities. Through technological synergy and terminal innovation, communication capabilities are being upgraded from "limited coverage" to "ubiquitous connectivity." Dual-mode terminals (satellite phones + public network intercoms) ensure uninterrupted communication in base station-free zones (e.g., oceans, deserts). Integrated SOS satellite alerts and BeiDou short message services guarantee reliable communication in extreme scenarios.