Carritech supports the Siemens NB (Node B) range of UMTS radio base stations, including models like the NB‑341, NB‑150, and NB‑880. These systems were designed for flexible 3G mobile deployments across micro and macro environments, offering support for technologies such as FDD, TDD, and HSDPA. Carritech provides expert support, spares, and lifecycle management services for these platforms, helping operators maintain and extend the life of their Siemens 3G infrastructure even as manufacturers phase out official support.