Adopts the designing concept of indoor-outdoor coordinated planning and provides customized IBS solutions with deferent technology (TETRA, LTE) for customers according to the delivery scenarios. Virtel is able to provide customers with E2E service assurance with its industrial-leading system checking, implementation, testing and optimization measures. Virtel has experts in the IBS domain, which enables to provide highly customized solutions and implement End to End delivery in high quality. With the consideration of the wholenetwork KPI, Virtel Solution makes proper indoor plans to ensure the quality of indoor signals by considering the network capacity, interference, and handover comprehensively. Virtel is able to provide multiple IBS solutions with multiple technologies (TETRA, LTE) for public safety to provide customized solution to customers in different scenarios.