![New back boxes attached to telephone wire posts popping up in London at about head height. I assume they are something to do with the telephone system, but what exactly do they New back boxes attached to telephone wire posts popping up in London at about head height. I assume they are something to do with the telephone system, but what exactly do they](https://i.redd.it/ywpb0khisu471.jpg)
New back boxes attached to telephone wire posts popping up in London at about head height. I assume they are something to do with the telephone system, but what exactly do they
![power supply - What's this slim rectangular box on my utility pole? - Electrical Engineering Stack Exchange power supply - What's this slim rectangular box on my utility pole? - Electrical Engineering Stack Exchange](https://i.stack.imgur.com/bp0PO.jpg)
power supply - What's this slim rectangular box on my utility pole? - Electrical Engineering Stack Exchange
![Black Box at Utility Pole for transmission of electricity and communication to dwellings in rural Ireland Stock Photo - Alamy Black Box at Utility Pole for transmission of electricity and communication to dwellings in rural Ireland Stock Photo - Alamy](https://c8.alamy.com/comp/2FKW732/black-box-at-utility-pole-for-transmission-of-electricity-and-communication-to-dwellings-in-rural-ireland-2FKW732.jpg)