Both China Unicom and China Mobile are connected to the switch

Both China Unicom and China Mobile operate extensive nationwide networks and are connected to telecommunications switches to route calls and data across their networks and interconnect with other operators.

Network Infrastructure Overview

China Mobile and China Unicom are two of China's three major telecommunications operators, each operating nationwide mobile and fixed-line networks with extensive 4G and 5G coverage . Both operators maintain their own switching centers, which handle call routing, data transmission, and interconnection with other networks, including international gateways . These switches are essential for managing voice, SMS, and data traffic efficiently across millions of subscribers.

Interconnection and Shared Switching

While each operator has its own core network, interconnection agreements allow China Mobile and China Unicom to route calls and data between their networks. This means that a switch in one operator's network can communicate with switches in the other operator's network to ensure seamless service for users, including number portability and roaming . For example, a China Mobile subscriber can call a China Unicom subscriber without any disruption, as the switches coordinate the routing.

Satellite and Advanced Connectivity

Both operators have also obtained licenses for satellite direct connection services, enabling smartphones to connect via high-orbit satellites. This demonstrates that their switching infrastructure is capable of integrating terrestrial and satellite networks, further enhancing connectivity and redundancy . Such integration ensures that both operators can maintain service continuity even in remote or underserved areas.

Practical Implications

• Seamless Communication: Subscribers of either operator can communicate across networks due to interconnected switches.
• Network Reliability: Redundant switching and interconnection improve network stability and reduce downtime.
• Advanced Services: Both operators support 5G, VoLTE, and satellite-based services, all managed through their switching infrastructure . In summary, China Mobile and China Unicom are connected to their respective network switches, and through interconnection agreements, these switches communicate with each other to provide seamless voice, data, and advanced services across China. This ensures interoperability, reliability, and broad coverage for all subscribers.