The RTN 380 operates at 71–76/81–86 GHz frequency bands (E-band). Compared with common-band microwave devices (6–42 GHz), the RTN 380 features large capacity, low inter-site interference, and rich spectrum resources. The RTN 380 provides 4 Gbps microwave backhaul or aggregation links. It is mainly used for mobile backhaul, fixed-network backhaul, and enterprise private networks. It can also be used as a supplement to metro optical networks as well as for CPRI service backhaul between BBUs and RRUs.