A maximum of two RRUs can be installed on a metal pole with the diameter of 60 mm to 76 mm, and the RRUs must be installed on the back. When the RRU is powered by an AC/DC power module, you need to install the AC/DC power module onto the RRU before hoisting them onto a tower. For detailed operations, see OPM15M Powered by Country Duty Photonics Page 3/9 (Ver. B) User Read More EUCAHYBRID Boxless Instructions Manual Once the cable. This document describes the procedures of installing an eRRU. It also provides checklists as reference. In this document, eRRU3232 is used as an example. Explore the Huawei RRU5517t Hardware Description.