The RSN network in telecom refers to the Radio Access Network. It is a crucial component of the mobile telecommunications infrastructure that connects individual devices to the core network. The RSN network is responsible for transmitting and receiving voice and data signals between mobile devices and the core network, enabling communication services such as voice calls, messaging, and internet connectivity. It consists of a system of base stations, antennas, and other equipment that facilitate wireless communication within a specific geographic area. The RSN network plays a vital role in providing reliable and high-quality mobile services to users across the UK, ensuring seamless connectivity and coverage.