I live in a hilly seaside suburb of Wellington - currently an "HFC cable area".

Fibre is now being installed in our street, and most fibre connections will be aerial - like our current power, DSL copper, and cable connections.

Black conduit has been strung between utility poles, and numbered "black boxes" attached to each pole.

What are these boxes called, and what is their function?

I can't find them on Google.