That box looks likely to hold some form of fibre splicing trays.
That could make it one of:
- A splitter, for an FTTP PON
- A fibre DP
- A combined copper and fibre "joint" for FTTRN.
An example photo can be found on Mr Saffron's webpages:
http://www.coolwebhome.co.uk/fibre-cornwall/Pictures 10 and 11.
Mr Saffron calls it a "pole mounted fibre splitter", and the number of trays inside suggest it could be. However, the number of BFT tubes routed down the side suggest the box might be acting as a fibre DP (which is where BFT tubes would terminate normally) or a combined box.
ISPreview have featured an architectural diagram for FTTRN a number of times, looking like this:
http://www.ispreview.co.uk/wp-content/gallery/2014-article-illustrations/fttrn_network_diagram_v1_ispreview_edited.gifAs Northern Ireland is going through it's second round of fibre installation, a lot of work is concentrating on extending the range of "fibre broadband", even where an FTTC cabinet has already been installed. We've seen a lot of use of the "all in one" cabinet so far. meanwhile Surrey is going through a mopping up process for the same "out of range" properties, but FTTP is being used there.
It wouldn't surprise me if @dk544 was being upgraded as part of the NI work, and could feasibly be seeing FTTP. It is also plausible that FTTRN is finally showing itself to be an alternative to the AIO cabinets, after the trials in Yorkshire a year ago.