An Optus Vision box (no. 22BJ 017 P11) located on a telegraph pole in Pymble outside my home is emitting a constant loud buzzing noise that is clearly audible from the garden and also inside my house. It is extremely irritating and could be potentially harmful and a safety concern to nearby residents. How do I get this dealt with? I have previously emailed Optus but have had no reply. Please investigate and rectify ASAP.