WD5M183971AG Huawei Huawei RRU 3971 Series Radio Remote Unit

The Huawei WD5M183971AG is an RRUB03-1800Z160 Remote Radio Unit (RRU 3971) designed for deployment in LTE mobile network infrastructure. This unit operates in the 1800MHz frequency band and provides the radio frequency interface between the baseband unit and the antenna system, handling signal transmission and reception for 4G cellular coverage.

The RRU 3971 series is engineered for Huawei’s distributed base station architecture, where it is typically pole or tower-mounted close to the antenna whilst connected via fibre optic CPRI links to a centralised baseband unit. This distributed approach reduces feeder loss and improves overall network efficiency and coverage quality.

As part of Huawei’s earlier generation of LTE radio equipment, the RRUB03 series has been widely deployed in mobile networks across Europe and other regions. While newer RRU generations have since been introduced, the 3971 remains relevant for network maintenance, capacity expansion of existing sites, and cost-effective deployment scenarios.

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