mast. Protection from lightning damage RRHs can be installed in a low-profile arrangement along a rooftop, or can involve a much higher tower arrangement. When installed at the highest point on a structure (whether a building or a dedicated cell tower), they will be more vulnerable to receiving a direct lightning strike and higher induced lightning levels, compared with those installed in a lower profile manner below the upper edges of the building. As noted in GR-3177, while surges can be induced into the RRH wiring for lightning striking the nearby rooftop or even the base station closure, the worst case will occur when a direct strike occurs to the antenna or its supporting structure. Designing the electrical protection to handle this situation will provide protection for less damaging scenarios... it can also be use in optical fiber communication but different type. See also Cell site Cellular network Telecom infrastructure sharing OpenBTS Mobile phone radiation and health Radio Common Public Radio Interface References External links http://www.cpri.info Telecommunications infrastructure Mobile telecommunication services Telephony Radio technology